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Warlock changes in WoW Forever: every spell and talent vs Classic

Rotations & Guide · PvE · PvP · Builds · Abilities · Talent Calculator · Macros · Changes vs Classic

Every Warlock change in the WoW Forever beta client (build 1.60.1.70170) compared with Classic Era 1.15.9.69722: 18 new talents, 32 new or changed spells, 33 changed talents, 12 Classic spells and talents removed, 16 Season of Discovery leftovers. Each spell lists every rank's damage or healing, spell power coefficient, cost, cast time, range and duration in both clients, written as "Forever instead of Classic". Classic Era is only the baseline: every Forever number comes from the Forever client's own data. Ranks learned above the beta's level cap (30) are in the client but can't be reached yet.

Jump to: New spells · New talents · Changed spells · Changed talents · Removed · Season of Discovery leftovers

New Warlock spells in Forever

Portal of Summoning New

New in Forever: was a Season of Discovery spell; learned later (vs its Season of Discovery version).

New in Forever: not a Classic Era ability. It keeps its Season of Discovery spell ID, and Forever teaches it at level 60, so the comparison is with that Season of Discovery version.
Learned later. Forever: level 60 instead of level 1.
Ranks with a Season of Discovery spell ID are compared with that SoD version from the Classic Era client, not original Classic.

Rank	Level	Forever	Classic Era	Coefficient	Classic coefficient
—	60	—	— (Season of Discovery)	—	—

New Warlock talents

Demonic Aegis New talent

New Demonology talent, tier 2, 2 ranks, from level 15.

Forever (Rank 2): Increases the effectiveness of your Demon Skin and Demon Armor spells by 30%.

Demonic Energies New talent

New Demonology talent, tier 2, 2 ranks, from level 15.

Forever (Rank 2): You heal your pet for 15% of all spell damage you deal. When you gain Mana from Life Tap, your summoned demon gains 100% of the Mana you gain.

Improved Drains New talent

New Affliction talent, tier 2, 3 ranks, from level 15.

Forever (Rank 3): Increases health drained or damage done by your Drain Life, Drain Soul, and Wrack spells by 20%.

Malediction New talent (Classic Era: Improved Curse of Weakness)

New Affliction talent in the place of Classic's Improved Curse of Weakness.

Classic Era (Rank 5): Increases the effect of your Curse of Weakness by 20%.

Forever (Rank 5): Increases all periodic damage done by your Warlock spells by 5%.

Molten Skin New talent

New Destruction talent, tier 2, 5 ranks, from level 15.

Forever (Rank 5): Reduces all damage taken by 10%.

Soul Harvest New talent (Classic Era: Improved Drain Soul)

New Affliction talent in the place of Classic's Improved Drain Soul.

Season of Discovery (Rank 2): Gives you a 100% chance to get a 100% increase to your Mana regeneration for 10 sec if the target is killed by you while you drain its soul. In addition your Mana may continue to regenerate while casting at 50% of normal.

Forever (Rank 2): Killing a non-trivial target afflicted by your Drain Soul increases your Mana regeneration by 100% for 10 sec and allows 100% of normal Mana regeneration to continue while casting.

Pandemic New talent

New Affliction talent, tier 3, 3 ranks, from level 20.

Forever (Rank 3): Increases the critical strike damage bonus of your Corruption, Bane of Agony, Bane of Doom, Drain Soul, Drain Life, Siphon Life, and Wrack spells by 100%.

Decimation New talent

New Demonology talent, tier 4, 2 ranks, from level 25.

Forever (Rank 2): Reduces the cooldown of your Soul Fire spell by 90%. When you cast Shadow Bolt or Searing Pain on an enemy below 35% health, they deal 6% increased damage, and for the next 10 sec your Soul Fire spell has its cast time reduced by 40% and costs no Soul Shards.

Demonic Brand New talent

New Demonology talent, tier 4, 3 ranks, from level 25.

Forever (Rank 3): Your Searing Pain generates 50% less threat and brands the target for 10 sec. Your pet's next 6 attacks against the target generate high threat and deal 20 to 23 (scales with Fire spell power and Shadow spell power) Fire or Shadow damage based on the pet. (Numbers at level 30; they grow with your level.)

Malevolence New talent (Classic Era: Grim Reach)

New Affliction talent in the place of Classic's Grim Reach.

Classic Era (Rank 5): Increases the range of your Affliction spells by 20%.

Forever (Rank 5): Increases the critical effect chance of your Shadow spells by 5%.

Bane of Havoc New talent (Classic Era: Improved Immolate)

New Destruction talent in the place of Classic's Improved Immolate.

Classic Era (Rank 1): Increases the initial damage of your Immolate spell by 25%.

Forever (Rank 1): Afflicts the target for 5 min, causing 15% of all damage done by the Warlock to other targets to also be dealt to the cursed target. Bane of Havoc is limited to 1 target, and only one Bane per Warlock can be active on any one target.

Demonic Knowledge New talent

New Demonology talent, tier 5, 3 ranks, from level 30.

Forever (Rank 3): Increases your spell damage and your Demon pet's spell damage by up to 100% of your level while you have a summoned Demon pet active.

Fire and Brimstone New talent

New Destruction talent, tier 5, 3 ranks, from level 30.

Forever (Rank 3): Increases the critical strike chance of your Conflagrate spell by 25%.

Improved Felhunter New talent (Classic Era: Improved Subjugate Demon)

New Demonology talent in the place of Classic's Improved Subjugate Demon.

Classic Era (Rank 3): Reduces the Attack Speed and Casting Speed penalty of your Subjugate Demon spell by 10% and reduces the resist chance by 10%.

Forever (Rank 3): Increases the Attack Power reduction of your Felhunter's Tainted Blood, the healing of its Devour Magic, and the detection level of its Paranoia by 30%, and reduces the cooldown of its Spell Lock by 6 sec.

Shadow and Flame New talent (Classic Era: Emberstorm)

New Destruction talent in the place of Classic's Emberstorm.

Season of Discovery (Rank 5): Increases the damage done by your Fire spells by 10%.

Forever (Rank 5): Hitting an enemy with Conflagrate increases all Shadow damage you deal by 10% for 20 sec, and hitting an enemy with Shadowburn increases all Fire damage you deal by 10% for 20 sec. In addition, Conflagrate has a 100% chance not to consume Immolate, and Shadowburn has a 100% chance to instantly refund a Soul Shard.

Demonic Pact New talent

New Demonology talent, tier 7, 1 rank, from level 40.

Forever (Rank 1): Your Demonic Sacrifice effect is no longer cancelled by summoning a different Demon pet. Resummoning the sacrificed pet will still cancel the effect.

Incinerate New talent

New Destruction talent, tier 7, 1 rank, from level 40; less damage (vs its Season of Discovery version); costs more mana; cast time 2.5 sec instead of 2.25 sec; duration none instead of 15 sec.

Less damage. Rank 1: 90–104 instead of 222–258.
Costs more mana. Rank 1: 205 Mana instead of 14% of base Mana.
Cast time: 2.5 sec instead of 2.25 sec.
Duration: none instead of 15 sec.
Ranks with a Season of Discovery spell ID are compared with that SoD version from the Classic Era client, not original Classic.

Rank	Level	Forever	Classic Era	Coefficient	Classic coefficient	Cost	Cast time	Duration
Rank 1	40	90–104	222–258 (Season of Discovery)	0.714	0.714	205 Mana instead of 14% of base Mana	2.5 sec instead of 2.25 sec	none instead of 15 sec
Rank 2	50	134–156	new in Forever	0.714	—	265 Mana	2.5 sec	none
Rank 3	60	201–233	new in Forever	0.714	—	325 Mana	2.5 sec	none

Forever (Rank 1): Deals 90 to 104 Fire damage to your target and an additional 25% damage if the target is afflicted by Immolate.

Wrack New talent (Classic Era: Dark Pact)

New Affliction talent in the place of Classic's Dark Pact.

Classic Era (Rank 1): Drains 150 of your pet's Mana, returning 100% to you.

Forever (Rank 1): Tears the target apart from within, inflicting 36 Shadow damage every 1 sec and increasing the damage they take from your other Shadow damage over time effects by 10% for 6 sec.

Changed Warlock spells, rank by rank

Classic Era's coefficients for ranks learned before level 20 include Classic's low-level penalty; the Forever client gives those ranks their full coefficient (see the downrank calculator).

Demon Skin Changed

Tooltip changed.

Tooltip text changed on 2 ranks; the numbers in both clients' spell data are the same.

Rank	Level	Forever	Classic Era	Coefficient	Classic coefficient
Rank 1	1	40	40	—	—
Rank 2	10	120	120	—	—

Classic Era (Rank 2): Protects the caster, increasing armor by 120 and restores 5 Health per 5 sec. for 30 min.

Forever (Rank 2): Protects the caster, increasing armor by 120 and increases health regeneration by 5 health per 5 sec. for 30 min.

Immolate Changed

Less damage (all 8 ranks); higher spell power coefficient (2 of 8 ranks).

Less damage (all 8 ranks). Rank 8: 275 over 15 sec + 158 instead of 510 over 15 sec + 279.
Higher spell power coefficient (2 of 8 ranks). Rank 2: 0.2 instead of 0.125.

Rank	Level	Forever	Classic Era	Coefficient	Classic coefficient
Rank 1	1	15 over 15 sec + 8	20 over 15 sec + 8	0.2	0.058
Rank 2	10	30 over 15 sec + 17	40 over 15 sec + 19	0.2	0.125
Rank 3	20	60 over 15 sec + 32	90 over 15 sec + 45	0.2	0.2
Rank 4	30	95 over 15 sec + 56	165 over 15 sec + 90	0.2	0.2
Rank 5	40	125 over 15 sec + 72	255 over 15 sec + 134	0.2	0.2
Rank 6	50	190 over 15 sec + 106	365 over 15 sec + 192	0.2	0.2
Rank 7	60	260 over 15 sec + 146	485 over 15 sec + 258	0.2	0.2
Rank 8	60	275 over 15 sec + 158	510 over 15 sec + 279	0.2	0.2

Rank 1: 15 over 15 sec + 8 instead of 20 over 15 sec + 8; Rank 2: 30 over 15 sec + 17 instead of 40 over 15 sec + 19; Rank 3: 60 over 15 sec + 32 instead of 90 over 15 sec + 45; Rank 4: 95 over 15 sec + 56 instead of 165 over 15 sec + 90; Rank 5: 125 over 15 sec + 72 instead of 255 over 15 sec + 134; Rank 6: 190 over 15 sec + 106 instead of 365 over 15 sec + 192; Rank 7: 260 over 15 sec + 146 instead of 485 over 15 sec + 258; Rank 8: 275 over 15 sec + 158 instead of 510 over 15 sec + 279.

Classic Era (Rank 8): Burns the enemy for 279 Fire damage and then an additional 510 Fire damage over 15 sec.

Forever (Rank 8): Burns the enemy for 158 Fire damage and then an additional 275 Fire damage over 15 sec.

Shadow Bolt Changed

Less damage (all 10 ranks); higher spell power coefficient (3 of 10 ranks).

Less damage (all 10 ranks). Rank 10: 253–283 instead of 482–538.
Higher spell power coefficient (3 of 10 ranks). Rank 3: 0.8 instead of 0.56.

Rank	Level	Forever	Classic Era	Coefficient	Classic coefficient
Rank 1	1	11–15	12–16	0.486	0.14
Rank 2	6	22–28	23–29	0.629	0.299
Rank 3	12	38–44	48–56	0.8	0.56
Rank 4	20	52–60	86–98	0.857	0.857
Rank 5	28	73–83	142–162	0.857	0.857
Rank 6	36	95–107	204–230	0.857	0.857
Rank 7	44	133–149	281–315	0.857	0.857
Rank 8	52	180–202	360–402	0.857	0.857
Rank 9	60	237–265	455–507	0.857	0.857
Rank 10	60	253–283	482–538	0.857	0.857

Rank 1: 11–15 instead of 12–16; Rank 2: 22–28 instead of 23–29; Rank 3: 38–44 instead of 48–56; Rank 4: 52–60 instead of 86–98; Rank 5: 73–83 instead of 142–162; Rank 6: 95–107 instead of 204–230; Rank 7: 133–149 instead of 281–315; Rank 8: 180–202 instead of 360–402; Rank 9: 237–265 instead of 455–507; Rank 10: 253–283 instead of 482–538.

Classic Era (Rank 10): Sends a shadowy bolt at the enemy, causing 482 to 538 Shadow damage.

Forever (Rank 10): Sends a shadowy bolt at the enemy, causing 253 to 283 Shadow damage.

Corruption Changed

Less damage (6 of 7 ranks); higher spell power coefficient (all 7 ranks).

Less damage (6 of 7 ranks). Rank 7: 438 over 18 sec instead of 822 over 18 sec.
Higher spell power coefficient (all 7 ranks). Rank 7: 0.2 instead of 0.167.

Rank	Level	Forever	Classic Era	Coefficient	Classic coefficient
Rank 1	4	40 over 12 sec	40 over 12 sec	0.2	0.08
Rank 2	14	65 over 15 sec	90 over 15 sec	0.2	0.155
Rank 3	24	132 over 18 sec	222 over 18 sec	0.2	0.167
Rank 4	34	168 over 18 sec	324 over 18 sec	0.2	0.167
Rank 5	44	240 over 18 sec	486 over 18 sec	0.2	0.167
Rank 6	54	342 over 18 sec	666 over 18 sec	0.2	0.167
Rank 7	60	438 over 18 sec	822 over 18 sec	0.2	0.167

Rank 2: 65 over 15 sec instead of 90 over 15 sec; Rank 3: 132 over 18 sec instead of 222 over 18 sec; Rank 4: 168 over 18 sec instead of 324 over 18 sec; Rank 5: 240 over 18 sec instead of 486 over 18 sec; Rank 6: 342 over 18 sec instead of 666 over 18 sec; Rank 7: 438 over 18 sec instead of 822 over 18 sec.

Classic Era (Rank 7): Corrupts the target, causing 822 Shadow damage over 18 sec.

Forever (Rank 7): Corrupts the target, causing 438 Shadow damage over 18 sec.

Curse of Weakness Changed

Stronger effect (all 6 ranks).

Stronger effect (all 6 ranks). Rank 6: −37 instead of −31.

Rank	Level	Forever	Classic Era	Coefficient	Classic coefficient
Rank 1	4	−4	−3	—	—
Rank 2	12	−7	−6	—	—
Rank 3	22	−12	−10	—	—
Rank 4	32	−18	−15	—	—
Rank 5	42	−26	−22	—	—
Rank 6	52	−37	−31	—	—

Rank 1: −4 instead of −3; Rank 2: −7 instead of −6; Rank 3: −12 instead of −10; Rank 4: −18 instead of −15; Rank 5: −26 instead of −22; Rank 6: −37 instead of −31.

Classic Era (Rank 6): Damage caused by the target is reduced by 31 for 2 min. Only one Curse per Warlock can be active on any one target.

Forever (Rank 6): Physical damage caused by the target is reduced by 37 for 2 min. Only one Curse per Warlock can be active on any one target.

Life Tap Changed

Tooltip changed.

Tooltip text changed on 6 ranks; the numbers in both clients' spell data are the same.

Classic Era (Rank 6): Converts 420 health into 420 mana

Forever (Rank 6): Converts 420 (+100% of Spirit) Health into 420 (+100% of Spirit) Mana for you. Spirit increases the amount converted.

Bane of Agony Renamed (Classic Era: Curse of Agony)

Renamed from Curse of Agony; less damage (all 6 ranks); higher spell power coefficient (all 6 ranks).

Renamed: Curse of Agony in Classic Era.
Less damage (all 6 ranks). Rank 6: 552 over 24 sec instead of 1044 over 24 sec.
Higher spell power coefficient (all 6 ranks). Rank 6: 0.133 instead of 0.083.

Rank	Level	Forever	Classic Era	Coefficient	Classic coefficient
Rank 1	8	72 over 24 sec	84 over 24 sec	0.133	0.046
Rank 2	18	120 over 24 sec	180 over 24 sec	0.133	0.077
Rank 3	28	168 over 24 sec	324 over 24 sec	0.133	0.083
Rank 4	38	252 over 24 sec	504 over 24 sec	0.133	0.083
Rank 5	48	396 over 24 sec	780 over 24 sec	0.133	0.083
Rank 6	58	552 over 24 sec	1044 over 24 sec	0.133	0.083

Rank 1: 72 over 24 sec instead of 84 over 24 sec; Rank 2: 120 over 24 sec instead of 180 over 24 sec; Rank 3: 168 over 24 sec instead of 324 over 24 sec; Rank 4: 252 over 24 sec instead of 504 over 24 sec; Rank 5: 396 over 24 sec instead of 780 over 24 sec; Rank 6: 552 over 24 sec instead of 1044 over 24 sec.

Classic Era (Rank 6): Curses the target with agony, causing 1044 Shadow damage over 24 sec. This damage is dealt slowly at first, and builds up as the Curse reaches its full duration. Only one Curse per Warlock can be active on any one target.

Forever (Rank 6): Afflicts the target with agony, causing 552 Shadow damage over 24 sec. This damage is dealt slowly at first, and builds up as the Bane reaches its full duration. Only one Bane per Warlock can be active on any one target.

Create Healthstone Merged

5 Classic spells merged into one.

One ranked ability in Forever (5 ranks); Classic Era had separate spells: Create Healthstone, Create Healthstone (Greater), Create Healthstone (Lesser), Create Healthstone (Major), Create Healthstone (Minor).

Rank	Level	Forever	Classic Era	Coefficient	Classic coefficient
Rank 1	10	—	— (Create Healthstone (Minor))	—	—
Rank 2	22	—	— (Create Healthstone (Lesser))	—	—
Rank 3	34	—	—	—	—
Rank 4	46	—	— (Create Healthstone (Greater))	—	—
Rank 5	58	—	— (Create Healthstone (Major))	—	—

Classic Era (Rank 5): Creates a Major Healthstone that can be used to instantly restore 1200 health. Conjured items disappear if logged out for more than 15 minutes.

Forever (Rank 5): Creates a Major Healthstone that can be used to instantly restore 1440 health. Conjured items disappear if logged out for more than 15 minutes.

Drain Soul Changed

More damage on 2 ranks, less on 2; higher spell power coefficient (1 of 4 ranks).

More damage on 2 ranks, less on 2. Rank 4: 420 over 15 sec instead of 455 over 15 sec.
Higher spell power coefficient (1 of 4 ranks). Rank 1: 0.1 instead of 0.063.

Rank	Level	Forever	Classic Era	Coefficient	Classic coefficient
Rank 1	10	85 over 15 sec	55 over 15 sec	0.1	0.063
Rank 2	24	170 over 15 sec	155 over 15 sec	0.1	0.1
Rank 3	38	270 over 15 sec	295 over 15 sec	0.1	0.1
Rank 4	52	420 over 15 sec	455 over 15 sec	0.1	0.1

Rank 1: 85 over 15 sec instead of 55 over 15 sec; Rank 2: 170 over 15 sec instead of 155 over 15 sec; Rank 3: 270 over 15 sec instead of 295 over 15 sec; Rank 4: 420 over 15 sec instead of 455 over 15 sec.

Classic Era (Rank 4): Drains the soul of the target, causing 455 Shadow damage over 15 sec. If the target dies while being drained, and yields experience or honor, the caster gains a Soul Shard. Soul Shards are required for other spells.

Forever (Rank 4): Drains the soul of the target, causing 420 Shadow damage over 15 sec. Non-trivial targets damaged by Drain Soul have a chance to grant you a Soul Shard. Non-trivial targets killed by Drain Soul will always grant you a Soul shard. Soul Shards are required for other spells.

Health Funnel Changed

More healing (all 7 ranks).

More healing (all 7 ranks). Rank 7: 1530 over 10 sec + 612 over 10 sec instead of 1530 over 10 sec.

Rank	Level	Forever	Classic Era	Coefficient	Classic coefficient
Rank 1	12	120 over 10 sec + 54 over 10 sec	120 over 10 sec	—	—
Rank 2	20	240 over 10 sec + 105 over 10 sec	240 over 10 sec	—	—
Rank 3	28	430 over 10 sec + 170 over 10 sec	430 over 10 sec	—	—
Rank 4	36	640 over 10 sec + 254 over 10 sec	640 over 10 sec	—	—
Rank 5	44	890 over 10 sec + 350 over 10 sec	890 over 10 sec	—	—
Rank 6	52	1190 over 10 sec + 470 over 10 sec	1190 over 10 sec	—	—
Rank 7	60	1530 over 10 sec + 612 over 10 sec	1530 over 10 sec	—	—

Rank 1: 120 over 10 sec + 54 over 10 sec instead of 120 over 10 sec; Rank 2: 240 over 10 sec + 105 over 10 sec instead of 240 over 10 sec; Rank 3: 430 over 10 sec + 170 over 10 sec instead of 430 over 10 sec; Rank 4: 640 over 10 sec + 254 over 10 sec instead of 640 over 10 sec; Rank 5: 890 over 10 sec + 350 over 10 sec instead of 890 over 10 sec; Rank 6: 1190 over 10 sec + 470 over 10 sec instead of 1190 over 10 sec; Rank 7: 1530 over 10 sec + 612 over 10 sec instead of 1530 over 10 sec.

Classic Era (Rank 7): Gives 153 health to the caster's pet every second for 10 sec as long as the caster channels.

Forever (Rank 7): Gives 153 health to the caster's pet every second for 10 sec as long as the caster channels. Generates reduced threat.

Curse of Recklessness Changed

Stronger effect (all 4 ranks).

Stronger effect (all 4 ranks). Rank 4: −505 instead of 90.

Rank	Level	Forever	Classic Era	Coefficient	Classic coefficient
Rank 1	14	−175	20	—	—
Rank 2	28	−285	45	—	—
Rank 3	42	−395	65	—	—
Rank 4	56	−505	90	—	—

Rank 1: −175 instead of 20; Rank 2: −285 instead of 45; Rank 3: −395 instead of 65; Rank 4: −505 instead of 90.

Classic Era (Rank 4): Curses the target with recklessness, increasing melee attack power by 90 but reducing armor by 640 for 2 min. Cursed enemies will not flee and will ignore Fear and Horror effects. Only one Curse per Warlock can be active on any one target.

Forever (Rank 4): Curses the target with recklessness, reducing the target's armor by 505 for 2 min. Cursed enemies will not flee and will ignore Fear and Horror effects. Only one Curse per Warlock can be active on any one target.

Drain Life Changed

Less damage (5 of 6 ranks).

Less damage (5 of 6 ranks). Rank 6: 255 over 5 sec instead of 355 over 5 sec.

Rank	Level	Forever	Classic Era	Coefficient	Classic coefficient
Rank 1	14	50 over 5 sec	50 over 5 sec	—	—
Rank 2	22	70 over 5 sec	85 over 5 sec	—	—
Rank 3	30	110 over 5 sec	145 over 5 sec	—	—
Rank 4	38	140 over 5 sec	205 over 5 sec	—	—
Rank 5	46	195 over 5 sec	275 over 5 sec	—	—
Rank 6	54	255 over 5 sec	355 over 5 sec	—	—

Rank 2: 70 over 5 sec instead of 85 over 5 sec; Rank 3: 110 over 5 sec instead of 145 over 5 sec; Rank 4: 140 over 5 sec instead of 205 over 5 sec; Rank 5: 195 over 5 sec instead of 275 over 5 sec; Rank 6: 255 over 5 sec instead of 355 over 5 sec.

Classic Era (Rank 6): Transfers 71 health every second from the target to the caster. Lasts 5 sec.

Forever (Rank 6): Transfers 51 health every 1 second from the target to the caster. Lasts 5 sec.

Create Soulstone Merged

5 Classic spells merged into one.

One ranked ability in Forever (5 ranks); Classic Era had separate spells: Create Soulstone, Create Soulstone (Greater), Create Soulstone (Lesser), Create Soulstone (Major), Create Soulstone (Minor).

Rank	Level	Forever	Classic Era	Coefficient	Classic coefficient
Rank 1	18	—	— (Create Soulstone (Minor))	—	—
Rank 2	30	—	— (Create Soulstone (Lesser))	—	—
Rank 3	40	—	—	—	—
Rank 4	50	—	— (Create Soulstone (Greater))	—	—
Rank 5	60	—	— (Create Soulstone (Major))	—	—

Searing Pain Changed

Less damage (all 6 ranks); higher spell power coefficient (1 of 6 ranks).

Less damage (all 6 ranks). Rank 6: 105–123 instead of 204–240.
Higher spell power coefficient (1 of 6 ranks). Rank 1: 0.429 instead of 0.396.

Rank	Level	Forever	Classic Era	Coefficient	Classic coefficient
Rank 1	18	21–25	34–42	0.429	0.396
Rank 2	26	30–36	59–71	0.429	0.429
Rank 3	34	40–48	86–104	0.429	0.429
Rank 4	42	56–68	122–146	0.429	0.429
Rank 5	50	78–92	158–188	0.429	0.429
Rank 6	58	105–123	204–240	0.429	0.429

Rank 1: 21–25 instead of 34–42; Rank 2: 30–36 instead of 59–71; Rank 3: 40–48 instead of 86–104; Rank 4: 56–68 instead of 122–146; Rank 5: 78–92 instead of 158–188; Rank 6: 105–123 instead of 204–240.

Classic Era (Rank 6): Inflict searing pain on the enemy target, causing 204 to 240 Fire damage. Causes a high amount of threat.

Forever (Rank 6): Inflict searing pain on the enemy target, causing 105 to 123 Fire damage. Causes a high amount of threat.

Curse of the Elements Changed

New rank: rank 4 (level 50); weaker effect (all 3 ranks); costs less mana (all 3 ranks); learned earlier (all 3 ranks).

Weaker effect (all 3 ranks). Rank 3: −60 instead of −75.
Costs less mana (all 3 ranks). Rank 3: 150 Mana instead of 200 Mana.
Learned earlier (all 3 ranks). Rank 3: level 40 instead of level 60.
New in Forever: Rank 4 (level 50).

Rank	Level	Forever	Classic Era	Coefficient	Classic coefficient	Cost
Rank 1	20	−30	−45	—	—	50 Mana instead of 100 Mana
Rank 2	30	−45	−60	—	—	100 Mana instead of 150 Mana
Rank 3	40	−60	−75	—	—	150 Mana instead of 200 Mana
Rank 4	50	−75	new in Forever	—	—	200 Mana

Rank 1: −30 instead of −45; Rank 2: −45 instead of −60; Rank 3: −60 instead of −75.

Season of Discovery (Rank 1): All your Curses except Curse of Shadow and Curse of the Elements now apply the Mark of Chaos, reducing the target's Arcane, Fire, Frost, Nature, and Shadow resistances by 49 and increasing all spell damage taken from those schools by 7% while they remain cursed. (Numbers at level 30; they grow with your level.)

Forever (Rank 1): Curses the target for 5 min, reducing Magic resistances by 30 and increases Magic damage taken by 4%. Only one Curse per Warlock can be active on any one target.

Demon Armor Changed

Tooltip changed.

Tooltip text changed on 5 ranks; the numbers in both clients' spell data are the same.

Rank	Level	Forever	Classic Era	Coefficient	Classic coefficient
Rank 1	20	210	210	—	—
Rank 2	30	300	300	—	—
Rank 3	40	390	390	—	—
Rank 4	50	480	480	—	—
Rank 5	60	570	570	—	—

Classic Era (Rank 5): Protects the caster, increasing armor by 570, Shadow resistance by 15 and restores 15 health every 5 sec. for 30 min.

Forever (Rank 5): Protects the caster, increasing armor by 570, Shadow resistance by 15 and increases health regeneration by 15 health per 5 sec. for 30 min.

Rain of Fire Changed

Value no longer in the client.

The Forever client has no number for these ranks: the server works it out (Classic Era Rank 4: 904 over 8 sec).

Rank	Level	Forever	Classic Era	Coefficient	Classic coefficient
Rank 1	20	worked out by the server	168 over 8 sec	—	—
Rank 2	34	worked out by the server	384 over 8 sec	—	—
Rank 3	46	worked out by the server	620 over 8 sec	—	—
Rank 4	58	worked out by the server	904 over 8 sec	—	—

Classic Era (Rank 4): Calls down a fiery rain to burn enemies in the area of effect for 904 Fire damage over 8 sec.

Forever (Rank 4): Calls down a fiery rain to burn enemies in the area of effect for 880 Fire damage over 8 sec.

Shadowburn Changed

Less damage (all 6 ranks); range 30 yd instead of 20 yd; duration 8 sec instead of 5 sec; moved to tier 3; top rank's effect changed.

Less damage (all 6 ranks). Rank 6: 251–281 instead of 450–502.
Range: 30 yd instead of 20 yd (all 6 ranks).
Duration: 8 sec instead of 5 sec (all 6 ranks).
Moved: Destruction tier 3, column 4 in Classic Era; Destruction tier 3, column 3 in Forever.
What the top rank does changed (tooltips below).

Rank	Level	Forever	Classic Era	Coefficient	Classic coefficient	Range	Duration
Rank 1	20	62–70	87–99	0.429	0.429	30 yd instead of 20 yd	8 sec instead of 5 sec
Rank 2	24	75–85	115–131	0.429	0.429	30 yd instead of 20 yd	8 sec instead of 5 sec
Rank 3	32	111–125	186–210	0.429	0.429	30 yd instead of 20 yd	8 sec instead of 5 sec
Rank 4	40	139–157	261–293	0.429	0.429	30 yd instead of 20 yd	8 sec instead of 5 sec
Rank 5	48	192–214	350–392	0.429	0.429	30 yd instead of 20 yd	8 sec instead of 5 sec
Rank 6	56	251–281	450–502	0.429	0.429	30 yd instead of 20 yd	8 sec instead of 5 sec

Rank 1: 62–70 instead of 87–99; Rank 2: 75–85 instead of 115–131; Rank 3: 111–125 instead of 186–210; Rank 4: 139–157 instead of 261–293; Rank 5: 192–214 instead of 350–392; Rank 6: 251–281 instead of 450–502.

Classic Era (Rank 1): Instantly blasts the target for 87 to 99 Shadow damage. If the target dies within 5 sec of Shadowburn, and yields experience or honor, the caster gains a Soul Shard.

Forever (Rank 1): Instantly blasts the target for 62 to 70 Shadow damage. If a non-trivial target dies within 8 sec of being hit with Shadowburn, the caster gains a Soul Shard.

Conflagrate Changed

Less damage (all 4 ranks); moved to tier 4; top rank's effect changed.

Less damage (all 4 ranks). Rank 6: 251–313 instead of 447–557.
Moved: Destruction tier 7, column 2 in Classic Era; Destruction tier 4, column 3 in Forever.
What the top rank does changed (tooltips below).

Rank	Level	Forever	Classic Era	Coefficient	Classic coefficient
Rank 1	25	84–106	new in Forever	0.429	—
Rank 2	32	107–137	new in Forever	0.429	—
Rank 3	40	128–164	240–306 (Classic Rank 1)	0.429	0.429
Rank 4	48	172–216	316–396 (Classic Rank 2)	0.429	0.429
Rank 5	54	212–266	383–479 (Classic Rank 3)	0.429	0.429
Rank 6	60	251–313	447–557 (Classic Rank 4)	0.429	0.429

Rank 3: 128–164 instead of 240–306; Rank 4: 172–216 instead of 316–396; Rank 5: 212–266 instead of 383–479; Rank 6: 251–313 instead of 447–557.

Classic Era (Rank 1): Ignites a target that is already afflicted by Immolate, dealing 240 to 306 Fire damage and consuming the Immolate spell.

Forever (Rank 1): Ignites a target that is already afflicted by your Immolate spell, dealing 84 to 106 Fire damage and consuming your Immolate effect.

Curse of Tongues Changed

Tooltip changed.

Tooltip text changed on 2 ranks; the numbers in both clients' spell data are the same.

Rank	Level	Forever	Classic Era	Coefficient	Classic coefficient
Rank 1	26	−50	−50	—	—
Rank 2	50	−60	−60	—	—

Classic Era (Rank 2): Forces the target to speak in Demonic, slowing the casting time of all spells by 60%. Only one Curse per Warlock can be active on any one target. Lasts 30 sec.

Forever (Rank 2): Forces the target to speak in Demonic, increasing the casting time of all spells by 60%. Only one Curse per Warlock can be active on any one target. Lasts 30 sec.

Detect Invisibility Merged

3 Classic spells merged into one.

One ranked ability in Forever (3 ranks); Classic Era had separate spells: Detect Greater Invisibility, Detect Invisibility, Detect Lesser Invisibility.

Rank	Level	Forever	Classic Era	Coefficient	Classic coefficient
Rank 1	26	100	100 (Detect Lesser Invisibility)	—	—
Rank 2	38	200	200	—	—
Rank 3	50	300	300 (Detect Greater Invisibility)	—	—

Create Firestone Merged

4 Classic spells merged into one.

One ranked ability in Forever (4 ranks); Classic Era had separate spells: Create Firestone, Create Firestone (Greater), Create Firestone (Lesser), Create Firestone (Major).

Rank	Level	Forever	Classic Era	Coefficient	Classic coefficient
Rank 1	28	—	— (Create Firestone (Lesser))	—	—
Rank 2	36	—	—	—	—
Rank 3	46	—	— (Create Firestone (Greater))	—	—
Rank 4	56	—	— (Create Firestone (Major))	—	—

Classic Era (Rank 4): Creates a Major Firestone which can be equipped in the off hand. When equipped, enchants the main hand weapon with fire, granting each attack a chance to deal 80 to 120 additional Fire damage. In addition, equipping the Major Firestone increases the damage done by fire spells by 21. Conjured items disappear if logged out for more than 15 minutes.

Forever (Rank 4): Creates a Major Firestone which can be used to enchant your weapon with Fire, increasing your spell critical strike chance by 2% and the damage done by your Fire spells by up to 21. Conjured items disappear if logged out for more than 15 minutes.

Hellfire Changed

Less damage (all 3 ranks).

Less damage (all 3 ranks). Rank 3: 3090 over 15 sec instead of 3120 over 15 sec.

Rank	Level	Forever	Classic Era	Coefficient	Classic coefficient
Rank 1	30	1230 over 15 sec	1245 over 15 sec	0.022	0.022
Rank 2	42	2055 over 15 sec	2085 over 15 sec	0.022	0.022
Rank 3	54	3090 over 15 sec	3120 over 15 sec	0.022	0.022

Rank 1: 1230 over 15 sec instead of 1245 over 15 sec; Rank 2: 2055 over 15 sec instead of 2085 over 15 sec; Rank 3: 3090 over 15 sec instead of 3120 over 15 sec.

Classic Era (Rank 3): Ignites the area surrounding the caster, causing 208 Fire damage to himself/herself and 208 Fire damage to all nearby enemies every 1 sec. Lasts 15 sec.

Forever (Rank 3): Ignites the area surrounding the caster, causing 206 Fire damage to himself/herself and 206 Fire damage to all nearby enemies every 1 sec. Lasts 15 sec.

Hellfire Effect Changed

Less damage (all 3 ranks).

Less damage (all 3 ranks). Rank 3: 206 instead of 208.

Rank	Level	Forever	Classic Era	Coefficient	Classic coefficient
Rank 1	30	82	83	0.022	0.022
Rank 2	42	137	139	0.022	0.022
Rank 3	54	206	208	0.022	0.022

Rank 1: 82 instead of 83; Rank 2: 137 instead of 139; Rank 3: 206 instead of 208.

Siphon Life Changed

Less damage (all 4 ranks); top rank's effect changed.

Less damage (all 4 ranks). Rank 4: 410 over 30 sec instead of 450 over 30 sec.
What the top rank does changed (tooltips below).

Rank	Level	Forever	Classic Era	Coefficient	Classic coefficient
Rank 1	30	110 over 30 sec	150 over 30 sec	—	—
Rank 2	38	190 over 30 sec	220 over 30 sec	—	—
Rank 3	48	290 over 30 sec	330 over 30 sec	—	—
Rank 4	58	410 over 30 sec	450 over 30 sec	—	—

Rank 1: 110 over 30 sec instead of 150 over 30 sec; Rank 2: 190 over 30 sec instead of 220 over 30 sec; Rank 3: 290 over 30 sec instead of 330 over 30 sec; Rank 4: 410 over 30 sec instead of 450 over 30 sec.

Classic Era (Rank 1): Transfers 15 health from the target to the caster every 3 sec. Lasts 30 sec.

Forever (Rank 1): Transfers 11 health from the target to the caster every 3 sec. Lasts 30 sec.

Create Spellstone Merged

3 Classic spells merged into one.

One ranked ability in Forever (3 ranks); Classic Era had separate spells: Create Spellstone, Create Spellstone (Greater), Create Spellstone (Major).

Rank	Level	Forever	Classic Era	Coefficient	Classic coefficient
Rank 1	36	—	—	—	—
Rank 2	48	—	— (Create Spellstone (Greater))	—	—
Rank 3	60	—	— (Create Spellstone (Major))	—	—

Classic Era (Rank 3): Creates a Major Spellstone for the caster. When equipped and used, the Major Spellstone removes all magic effects from the caster and will absorb 900 magic damage for 1 min. In addition, equipping the Major Spellstone improves your chance to get a critical strike with spells by 1%. Conjured items disappear if logged out for more than 15 minutes.

Forever (Rank 3): Creates a Major Spellstone which can be used to enchant your weapon with Shadow, increasing your spell haste by 2% and the damage done by your Shadow spells by up to 21. Conjured items disappear if logged out for more than 15 minutes.

Curse of Idiocy Changed

No longer taught by a trainer.

No trainer teaches it in Forever: it comes from a quest, item, rune or talent, or is the effect of another ability.

Rank	Level	Forever	Classic Era	Coefficient	Classic coefficient
Rank 1	38	−6	−6	—	—

Death Coil Changed

Less damage (all 3 ranks); costs more mana (all 3 ranks).

Less damage (all 3 ranks). Rank 3: 454 instead of 470.
Costs more mana (all 3 ranks). Rank 3: 600 Mana instead of 565 Mana.

Rank	Level	Forever	Classic Era	Coefficient	Classic coefficient	Cost
Rank 1	42	272	287	—	—	435 Mana instead of 430 Mana
Rank 2	50	359	375	—	—	525 Mana instead of 495 Mana
Rank 3	58	454	470	—	—	600 Mana instead of 565 Mana

Rank 1: 272 instead of 287; Rank 2: 359 instead of 375; Rank 3: 454 instead of 470.

Classic Era (Rank 3): Causes the enemy target to run in horror for 3 sec and causes 470 Shadow damage. The caster gains 100% of the damage caused in health.

Forever (Rank 3): Causes the enemy target to run in horror for 3 sec and causes 454 Shadow damage. The caster gains 100% of the damage caused in health.

Soul Fire Changed

Less damage (all 2 ranks).

Less damage (all 2 ranks). Rank 2: 383–479 instead of 703–881.

Rank	Level	Forever	Classic Era	Coefficient	Classic coefficient
Rank 1	48	334–420	623–783	1	1
Rank 2	56	383–479	703–881	1	1

Rank 1: 334–420 instead of 623–783; Rank 2: 383–479 instead of 703–881.

Classic Era (Rank 2): Burn the enemy's soul, causing 703 to 881 Fire damage.

Forever (Rank 2): Burn the enemy's soul, causing 383 to 479 Fire damage.

Bane of Doom Renamed (Classic Era: Curse of Doom)

Renamed from Curse of Doom; less damage; higher spell power coefficient.

Renamed: Curse of Doom in Classic Era.
Less damage. Forever: 1742 over 1 min instead of 3200 over 1 min.
Higher spell power coefficient. Forever: 4 instead of 1.

Rank	Level	Forever	Classic Era	Coefficient	Classic coefficient
—	60	1742 over 1 min	3200 over 1 min	4	1

Classic Era: Curses the target with impending doom, causing 3200 Shadow damage after 1 min. If the target dies from this damage, there is a chance that a Doomguard will be summoned. Cannot be cast on players.

Forever: Afflicts the target with impending doom, causing 1742 Shadow damage after 1 min. If the target dies from this damage, there is a chance that a Doomguard will be summoned. Cannot be cast on players. Only one Bane per Warlock can be active on any one target.

Changed Warlock talents

Bane Changed

Moved to tier 1; top rank's effect changed.

Moved: Destruction tier 2, column 2 in Classic Era; Destruction tier 1, column 3 in Forever.
What the top rank does changed (tooltips below).

Classic Era (Rank 5): Reduces the casting time of your Shadow Bolt and Immolate spells by 0.5 sec and your Soul Fire spell by 2 sec.

Forever (Rank 5): Reduces the casting time of your Shadow Bolt, Immolate, and Incinerate spells by 0.5 sec and your Soul Fire spell by 2 sec.

Demonic Embrace Changed

Top rank's effect changed.

What the top rank does changed (tooltips below).

Classic Era (Rank 5): Increases your total Stamina by 15% but reduces your total Spirit by 5%.

Forever (Rank 5): Increases your total Stamina by 15%.

Destructive Reach Changed

Moved to tier 1; top rank's effect changed.

Moved: Destruction tier 4, column 2 in Classic Era; Destruction tier 1, column 1 in Forever.
What the top rank does changed (tooltips below).

Classic Era (Rank 2): Increases the range of your Destruction spells by 20%.

Forever (Rank 2): Increases the range of your damaging spells by 20%.

Improved Corruption Changed

Top rank's effect changed.

What the top rank does changed (tooltips below).

Classic Era (Rank 5): Reduces the casting time of your Corruption spell by 2 sec.

Forever (Rank 5): Reduces the casting time of your Corruption spell by 2 sec and increases the damage it deals by 10%.

Improved Health Funnel Changed

Moved to tier 1; top rank's effect changed.

Moved: Demonology tier 2, column 1 in Classic Era; Demonology tier 1, column 1 in Forever.
What the top rank does changed (tooltips below).

Classic Era (Rank 2): Increases the amount of Health transferred by your Health Funnel spell by 20%.

Forever (Rank 2): Increases the amount of health transferred by your Health Funnel spell by 40%, reduces its health cost by 30%, and reduces all threat your Health Funnel generates by 100%. Allows Health Funnel to be used regardless of your demon's health.

Improved Imp Changed

Top rank's effect changed.

What the top rank does changed (tooltips below).

Classic Era (Rank 3): Increases the effect of your Imp's Firebolt, Fire Shield, and Blood Pact spells by 30%.

Forever (Rank 3): Increases the damage of your Imp's Firebolt spell by 30% and the effect of its Fire Shield spell by 30%.

Improved Life Tap Changed

Moved to tier 1.

Moved: Affliction tier 2, column 3 in Classic Era; Affliction tier 1, column 1 in Forever.

Improved Shadow Bolt Changed

Top rank's effect changed.

What the top rank does changed (tooltips below).

Classic Era (Rank 5): Your Shadow Bolt critical strikes increase Shadow damage dealt to the target by 20% until 4 non-periodic damage sources are applied. Effect lasts a maximum of 12 sec.

Forever (Rank 5): Your Shadow Bolt critical strikes increase Shadow damage taken by the target from your attacks by 20% for 12 sec.

Suppression Changed

Top rank's effect changed.

What the top rank does changed (tooltips below).

Classic Era (Rank 5): Reduces the chance for enemies to resist your Affliction spells by 10%.

Forever (Rank 5): Improves your chance to hit by 5% and reduces all threat you generate by 20%.

Unholy Power Changed

Moved to tier 1; top rank's effect changed.

Moved: Demonology tier 4, column 3 in Classic Era; Demonology tier 1, column 4 in Forever.
What the top rank does changed (tooltips below).

Classic Era (Rank 5): Increases the damage done by your Voidwalker, Succubus, Incubus, and Felhunter's melee attacks by 20%.

Forever (Rank 5): Increases all damage done by your Imp, Voidwalker, Succubus, Incubus, and Felhunter pets by 10%.

Aftermath Changed

Top rank's effect changed.

What the top rank does changed (tooltips below).

Classic Era (Rank 5): Gives your Destruction spells a 10% chance to daze the target for 5 sec.

Forever (Rank 5): Increases the initial damage of your Immolate spell by 50% and your Conflagrate spell has a 100% chance to Daze the target, reducing the target's movement speed by 50% for 5 sec.

Cataclysm Changed

Moved to tier 2; 3 ranks instead of 5; top rank's effect changed.

Moved: Destruction tier 1, column 3 in Classic Era; Destruction tier 2, column 2 in Forever.
3 ranks in Forever; Classic Era had 5.
What the top rank does changed (tooltips below).

Classic Era (Rank 3 (Era rank 5)): Reduces the Mana cost of your Destruction spells by 5%.

Forever (Rank 3 (Era rank 5)): Reduces the Mana cost of your Destruction spells by 10%.

Fel Vitality Changed (Classic Era: Fel Intellect)

3 ranks instead of 5; top rank's effect changed.

3 ranks in Forever; Classic Era had 5.
What the top rank does changed (tooltips below).

Classic Era (Rank 3 (Era rank 5)): Increases the maximum Mana of your Imp, Voidwalker, Succubus, Incubus, and Felhunter by 15%.

Forever (Rank 3 (Era rank 5)): Increases the maximum health and Mana of your Imp, Voidwalker, Succubus, Incubus, and Felhunter by 15%, and increases your maximum Mana by 15%.

Improved Voidwalker Changed

Top rank's effect changed.

What the top rank does changed (tooltips below).

Classic Era (Rank 3): Increases the effectiveness of your Voidwalker's Torment, Consume Shadows, Sacrifice and Suffering spells by 30%.

Forever (Rank 3): Increases the effectiveness of your Voidwalker's Torment, Consume Shadows, Sacrifice, and Suffering spells by 30%.

Amplify Curse Changed

Top rank's effect changed.

What the top rank does changed (tooltips below).

Classic Era (Rank 1): Increases the effect of your next Curse of Weakness or Curse of Agony by 50%, or your next Curse of Exhaustion by 20%. Lasts 30 sec.

Forever (Rank 1): Increases the effect of your next Curse of Weakness or Bane of Agony by 50%, or your next Curse of Exhaustion by 20%. Lasts 30 sec.

Demonic Sacrifice Changed

Moved to tier 3; top rank's effect changed.

Moved: Demonology tier 5, column 2 in Classic Era; Demonology tier 3, column 2 in Forever.
What the top rank does changed (tooltips below).

Classic Era (Rank 1): When activated, sacrifices your summoned demon to grant you an effect that lasts 30 min. The effect is canceled if any Demon is summoned. Imp: Increases your Fire damage by 15%. Voidwalker: Restores 3% of total Health every 4 sec. Succubus/Incubus: Increases your Shadow damage by 15%. Felhunter: Restores 2% of total Mana every 4 sec.

Forever (Rank 1): When activated, sacrifices your summoned Demon to enhance the opposing aspect of your power, granting you an effect that lasts 2 hours. The effect is canceled if any Demon is summoned. Imp: Increases your Shadow damage by 15%. Voidwalker: Restores 2% of your total Mana every 4 sec. Succubus/Incubus: Increases your Fire damage by 15%. Felhunter: Restores 3% of your total Health every 4 sec.

Fel Concentration Changed

3 ranks instead of 5; top rank's effect changed.

3 ranks in Forever; Classic Era had 5.
What the top rank does changed (tooltips below).

Classic Era (Rank 3 (Era rank 5)): Gives you a 70% chance to avoid interruption caused by damage while channeling the Drain Life, Drain Mana, or Drain Soul spell.

Forever (Rank 3 (Era rank 5)): Gives you a 70% chance to avoid interruption caused by damage while channeling or casting your Drain Life, Drain Mana, Drain Soul, or Wrack spells.

Improved Bane of Agony Changed (Classic Era: Improved Curse of Agony)

2 ranks instead of 3; top rank's effect changed.

2 ranks in Forever; Classic Era had 3.
What the top rank does changed (tooltips below).

Classic Era (Rank 2 (Era rank 3)): Increases the damage done by your Curse of Agony by 6%.

Forever (Rank 2 (Era rank 3)): Increases the damage done by your Bane of Agony by 10%.

Master Summoner Changed

Moved to tier 3.

Moved: Demonology tier 4, column 2 in Classic Era; Demonology tier 3, column 3 in Forever.

Ruin Changed

Moved to tier 3; 5 ranks instead of 1.

Moved: Destruction tier 5, column 3 in Classic Era; Destruction tier 3, column 2 in Forever.
5 ranks in Forever; Classic Era had 1.

Agonizing Flames Changed (Classic Era: Improved Searing Pain)

Moved to tier 4; renamed from Improved Searing Pain; 3 ranks instead of 5; top rank's effect changed.

Renamed: Improved Searing Pain in Classic Era.
Moved: Destruction tier 4, column 4 in Classic Era; Destruction tier 4, column 2 in Forever.
3 ranks in Forever; Classic Era had 5.
What the top rank does changed (tooltips below).

Classic Era (Rank 3 (Era rank 5)): Increases the critical strike chance of your Searing Pain spell by 10%.

Forever (Rank 3 (Era rank 5)): Increases the critical strike chance of your Searing Pain spell by 10% and the damage done by all your Destruction spells by 10%.

Curse of Exhaustion Changed

Moved to tier 4; top rank's effect changed.

Moved: Affliction tier 5, column 3 in Classic Era; Affliction tier 4, column 3 in Forever.
What the top rank does changed (tooltips below).

Classic Era (Rank 1): Reduces the target's movement speed by 10% for 12 sec. Only one Curse per Warlock can be active on any one target.

Forever (Rank 1): Reduces the target's movement speed by 30% for 12 sec. Only one Curse per Warlock can be active on any one target.

Fel Domination Changed

Moved to tier 4.

Moved: Demonology tier 3, column 2 in Classic Era; Demonology tier 4, column 3 in Forever.

Intensity Changed

3 ranks instead of 2; top rank's effect changed.

3 ranks in Forever; Classic Era had 2.
What the top rank does changed (tooltips below).

Classic Era (Rank 3 (Era rank 2)): Gives you a 70% chance to resist interruption caused by damage while channeling the Rain of Fire, Hellfire or Soul Fire spell.

Forever (Rank 3 (Era rank 2)): Gives you a 70% chance to resist interruption caused by damage while casting or channeling any Destruction spell.

Nightfall Changed

Top rank's effect changed.

What the top rank does changed (tooltips below).

Classic Era (Rank 2): Gives your Corruption and Drain Life spells a 4% chance to cause you to enter a Shadow Trance state after damaging the opponent. The Shadow Trance state reduces the casting time of your next Shadow Bolt spell by 100%.

Forever (Rank 2): Gives your Corruption, Drain Soul, Drain Life, and Wrack spells a 4% chance to cause you to enter a Shadow Trance after damaging the opponent. The Shadow Trance reduces the casting time of your next Shadow Bolt spell by 100%.

Pyroclasm Changed

Top rank's effect changed.

What the top rank does changed (tooltips below).

Classic Era (Rank 2): Gives your Rain of Fire, Hellfire, and Soul Fire spells a 26% chance to stun the target for 3 sec.

Forever (Rank 2): Gives your Soul Fire spell a 26% chance to Stun the target for 3 sec, and your Rain of Fire and Hellfire spells a 26% chance over their duration to Stun targets they damage for 3 sec.

Soul Link Changed

Moved to tier 5; top rank's effect changed.

Moved: Demonology tier 7, column 2 in Classic Era; Demonology tier 5, column 2 in Forever.
What the top rank does changed (tooltips below).

Classic Era (Rank 1): When active, 30% of all damage taken by the caster is taken by your Imp, Voidwalker, Succubus, Incubus, or Felhunter demon instead. In addition, both the demon and master will inflict 3% more damage. Lasts as long as the demon is active.

Forever (Rank 1): When active, 30% of all damage taken by the caster is taken by your Imp, Voidwalker, Succubus, Incubus, or Felhunter Demon instead. In addition, both the Demon and the master will inflict 3% more damage. Lasts as long as the Demon is active.

Soul Siphon Changed (Classic Era: Improved Drain Life)

Moved to tier 5; renamed from Improved Drain Life; 3 ranks instead of 5; top rank's effect changed.

Renamed: Improved Drain Life in Classic Era.
Moved: Affliction tier 2, column 4 in Classic Era; Affliction tier 5, column 3 in Forever.
3 ranks in Forever; Classic Era had 5.
What the top rank does changed (tooltips below).

Classic Era (Rank 3 (Era rank 5)): Increases the Health drained by your Drain Life spell by 10%.

Forever (Rank 3 (Era rank 5)): Increases the damage done or health drained by your Drain Life, Drain Soul, and Wrack spells by 12% per each of your other Affliction effects active on the target, up to a maximum increase of 36%.

Master Demonologist Changed

Top rank's effect changed.

What the top rank does changed (tooltips below).

Classic Era (Rank 5): Grants both the Warlock and the summoned demon an effect as long as that demon is active. Imp - Reduces threat caused by 20%. Voidwalker - Reduces physical damage taken by 10%. Succubus/Incubus - Increases all damage caused by 10%. Felhunter - Increases all resistances by 1 per level.

Forever (Rank 5): Grants both the Warlock and the summoned demon an effect as long as that demon is active. Imp - Increases Fire damage done by 10%. Voidwalker - Reduces Physical damage taken by 10%. Succubus/Incubus - Increases Shadow damage done by 10%. Felhunter - Reduces Magic damage taken by 10%.

Shadow Mastery Changed

Moved to tier 6; top rank's effect changed.

Moved: Affliction tier 6, column 2 in Classic Era; Affliction tier 6, column 3 in Forever.
What the top rank does changed (tooltips below).

Classic Era (Rank 5): Increases the damage dealt or life drained by your Shadow spells by 10%.

Forever (Rank 5): Increases the damage dealt or life drained by your Shadow spells by 5%.

Also changed as talents: Shadowburn, Conflagrate, Siphon Life (under Changed spells).

Classic Warlock spells and talents not in Forever

Devastation Removed talent

Classic Era Destruction talent (tier 3), not in Forever's talent trees.

A Destruction talent in Classic Era (tier 3, 5 ranks). Forever's talent trees don't have it.

Classic Era (Rank 5): Increases the critical strike chance of your Destruction spells by 5%.

Fel Stamina Removed talent

Classic Era Demonology talent (tier 3), not in Forever's talent trees.

A Demonology talent in Classic Era (tier 3, 5 ranks). Forever's talent trees don't have it.

Classic Era (Rank 5): Increases the maximum Health of your Imp, Voidwalker, Succubus, Incubus, and Felhunter by 15%.

Improved Curse of Exhaustion Removed talent

Classic Era Affliction talent (tier 5), not in Forever's talent trees.

A Affliction talent in Classic Era (tier 5, 4 ranks). Forever's talent trees don't have it.

Classic Era (Rank 4): Increases the speed reduction of your Curse of Exhaustion by 20%.

Improved Drain Mana Removed talent

Classic Era Affliction talent (tier 4), not in Forever's talent trees.

A Affliction talent in Classic Era (tier 4, 2 ranks). Forever's talent trees don't have it.

Classic Era (Rank 2): Causes 30% of the Mana drained by your Drain Mana spell to damage the opponent.

Improved Firebolt Removed talent

Classic Era Destruction talent (tier 3), not in Forever's talent trees.

A Destruction talent in Classic Era (tier 3, 2 ranks). Forever's talent trees don't have it.

Classic Era (Rank 2): Reduces the casting time of your Imp's Firebolt spell by 1 sec.

Improved Firestone Removed talent

Classic Era Demonology talent (tier 5), not in Forever's talent trees.

A Demonology talent in Classic Era (tier 5, 2 ranks). Forever's talent trees don't have it.

Classic Era (Rank 2): Increases the bonus Fire damage from Firestones and the Firestone effect by 30%.

Improved Healthstone Removed talent

Classic Era Demonology talent (tier 1), not in Forever's talent trees.

A Demonology talent in Classic Era (tier 1, 2 ranks). Forever's talent trees don't have it.

Classic Era (Rank 2): Increases the amount of Health restored by your Healthstone by 20%.

Improved Lash of Pain Removed talent

Classic Era Destruction talent (tier 3), not in Forever's talent trees.

A Destruction talent in Classic Era (tier 3, 2 ranks). Forever's talent trees don't have it.

Classic Era (Rank 2): Reduces the cooldown of your Succubus' and Incubus' Lash of Pain spell by 6 sec.

Improved Spellstone Removed talent

Classic Era Demonology talent (tier 7), not in Forever's talent trees.

A Demonology talent in Classic Era (tier 7, 2 ranks). Forever's talent trees don't have it.

Classic Era (Rank 2): Increases the amount of damage absorbed by your Spellstone by 30%.

Summon Felsteed Not taught

Still in the client files, but no longer a Warlock ability.

A trained Warlock ability in Classic Era (level 40). It is still in the Forever client files, but not on Forever's class ability list.

Classic Era: Summons a Felsteed, which serves as a mount for the caster. Speed is increased by 60%.

Curse of Shadow Removed

Classic Era ability (level 44) with no record in the Forever client.

On Classic Era's Warlock ability list (level 44, 2 ranks); the Forever client has no record of it.

Classic Era: Curses the target for 5 min, reducing Shadow and Arcane resistances by 75 and increasing Shadow and Arcane damage taken by 10%. Only one Curse per Warlock can be active on any one target.

Summon Dreadsteed Not taught

Still in the client files, but no longer a Warlock ability.

A trained Warlock ability in Classic Era (level 60). It is still in the Forever client files, but not on Forever's class ability list.

Classic Era: Summons a Dreadsteed, which serves as a mount for the caster. Speed is increased by 100%.

Season of Discovery leftovers

Speculation: these 16 Season of Discovery spells are still in the Forever client files, but no Forever trainer, quest or talent teaches them, so they are probably unused.

Unchanged Warlock abilities

The same as Classic Era in the client data (every rank's numbers and tooltip):

Source: the WoW Forever beta client's spell and talent tables (build 1.60.1.70170), compared with the Classic Era 1.15.9.69722 client by spell ID and name. Spell IDs from 395000 up are Season of Discovery spells the Classic Era client also carries: those are compared with their Season of Discovery version.