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

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

Every Mage change in the WoW Forever beta client (build 1.60.1.70170) compared with Classic Era 1.15.9.69722: 5 new talents, 28 new or changed spells, 36 changed talents, 1 Classic spells and talents removed, 12 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 Mage spells in Forever

Frostfire Bolt New

New in Forever: was a Season of Discovery rune; less damage (vs its Season of Discovery version); lower spell power coefficient; costs more mana; learned later.

• New in Forever: not a Classic Era ability. It was a Season of Discovery rune; in Forever it is a class ability.
• Less damage. Rank 1: 92–108 + 27 over 9 sec instead of 325–379 + 36 over 9 sec.
• Lower spell power coefficient. Rank 1: 0.814 instead of 1.
• Costs more mana. Rank 1: 205 Mana instead of 14% of base Mana.
• Learned later. Rank 1: level 40 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.

Season of Discovery (Rank 1): Launches a bolt of frostfire at the enemy, causing 176 to 205 Frostfire damage, slowing movement speed by 40% and causing an additional 19 Frostfire damage over 9 sec. This spell will be checked against the lower of the target's Frost and Fire resists and counts as both Frost and Fire damage. (Numbers at level 30; they grow with your level.)

Forever (Rank 1): Launches a bolt of frostfire at the enemy, causing 92 to 108 Frostfire damage, slowing movement speed by 40% and causing an additional 27 Frostfire damage over 9 sec. This spell will be checked against the lower of the target's Frost and Fire resists and counts as both Frost and Fire damage.

Teleport: Dalaran New

New in Forever.

• New in Forever: not a Classic Era ability.

New Mage talents

Arcane Blast New talent

New Arcane talent, tier 3, 1 rank, from level 20; less damage (vs its Season of Discovery version); costs more mana.

• Less damage. Rank 1: 50–58 instead of 453–527.
• Costs more mana. Rank 1: 15% of base Mana instead of 7% of base Mana.
• Ranks with a Season of Discovery spell ID are compared with that SoD version from the Classic Era client, not original Classic.

Forever (Rank 1): Blasts the target with energy, dealing 50 to 58 Arcane damage. Each time you cast Arcane Blast, the damage of all your other spells is increased by 10% and the mana cost of Arcane Blast is increased by 175%. Effect stacks up to 4 times and lasts 8 sec or until any other damage spell is cast.

Ice Lance New talent

New Frost talent, tier 3, 1 rank, from level 20; less damage (vs its Season of Discovery version); costs more mana; learned later.

• Less damage. Rank 2: 33–39 instead of 55–65.
• Costs more mana. Rank 2: 55 Mana instead of 8% of base Mana.
• Learned later. Rank 2: level 28 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.

Forever (Rank 1): Deals 26 to 30 Frost damage to an enemy target. Deals 300% increased damage to Frozen targets.

Heating Up New talent

New Fire talent, tier 4, 1 rank, from level 25.

Forever (Rank 1): Non-periodic critical strikes with Fireball, Frostfire Bolt, Fire Blast, and Scorch reduce the cast time of your next Pyroblast cast within 20 sec by 25%, stacking up to 3 times.

Missile Barrage New talent

New Arcane talent, tier 4, 1 rank, from level 25.

Forever (Rank 1): Gives your Arcane Blast spell a 40% chance, and your Fireball, Frostbolt, and Frostfire Bolt spells a 20% chance to reduce the channeled duration of your next Arcane Missiles spell by 50%, reduce the Mana cost by 100%, and missiles fire every 0.5 sec.

Fingers of Frost New talent

New Frost talent, tier 5, 2 ranks, from level 30.

Forever (Rank 2): Gives your Chill effects a 15% chance to grant you the Fingers of Frost effect, which treats your next 2 spells cast as if the target were Frozen. Lasts 15 sec.

Changed Mage 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).

Arcane Intellect Changed

Duration 1 hr instead of 30 min.

• Duration: 1 hr instead of 30 min (all 5 ranks).

Classic Era (Rank 5): Increases the target's Intellect by 31 for 30 min.

Forever (Rank 5): Increases the target's Intellect by 31 for 1 hour.

Chilled Changed

One rank instead of 3.

• One rank in Forever; Classic Era had 3.

Fireball Changed

Less damage (11 of 12 ranks); higher spell power coefficient (4 of 12 ranks).

• Less damage (11 of 12 ranks). Rank 12: 425–541 + 60 over 8 sec instead of 596–760 + 76 over 8 sec.
• Higher spell power coefficient (4 of 12 ranks). Rank 4: 0.857 instead of 0.793.

Rank 2: 30–44 + 3 over 6 sec instead of 31–45 + 3 over 6 sec; Rank 3: 45–61 + 6 over 6 sec instead of 53–73 + 6 over 6 sec; Rank 4: 62–86 + 12 over 8 sec instead of 84–116 + 12 over 8 sec; Rank 5: 92–124 + 16 over 8 sec instead of 139–187 + 20 over 8 sec; Rank 6: 131–175 + 24 over 8 sec instead of 199–265 + 28 over 8 sec; Rank 7: 162–212 + 24 over 8 sec instead of 255–335 + 32 over 8 sec; Rank 8: 204–266 + 32 over 8 sec instead of 318–414 + 40 over 8 sec; Rank 9: 262–338 + 40 over 8 sec instead of 392–506 + 52 over 8 sec; Rank 10: 328–420 + 48 over 8 sec instead of 475–609 + 60 over 8 sec; Rank 11: 397–505 + 56 over 8 sec instead of 561–715 + 72 over 8 sec; Rank 12: 425–541 + 60 over 8 sec instead of 596–760 + 76 over 8 sec.

Classic Era (Rank 12): Hurls a fiery ball that causes 596 to 760 Fire damage and an additional 76 Fire damage over 8 sec.

Forever (Rank 12): Hurls a fiery ball that causes 425 to 541 Fire damage and an additional 60 Fire damage over 8 sec.

Conjure Water Changed

New rank: rank 8.

• New in Forever: Rank 8.

Frostbolt Changed

Less damage (9 of 11 ranks); higher spell power coefficient (3 of 11 ranks).

• Less damage (9 of 11 ranks). Rank 11: 457–493 instead of 515–555.
• Higher spell power coefficient (3 of 11 ranks). Rank 3: 0.597 instead of 0.463.

Rank 3: 43–49 instead of 51–57; Rank 4: 57–63 instead of 74–82; Rank 5: 91–99 instead of 126–138; Rank 6: 128–140 instead of 174–190; Rank 7: 173–189 instead of 227–247; Rank 8: 234–254 instead of 292–316; Rank 9: 295–321 instead of 353–383; Rank 10: 371–401 instead of 429–463; Rank 11: 457–493 instead of 515–555.

Classic Era (Rank 11): Launches a bolt of frost at the enemy, causing 515 to 555 Frost damage and slowing movement speed by 40% for 9 sec.

Forever (Rank 11): Launches a bolt of frost at the enemy, causing 457 to 493 Frost damage and slowing movement speed by 40% for 9 sec.

Fire Blast Changed

Less damage (6 of 7 ranks); higher spell power coefficient (2 of 7 ranks).

• Less damage (6 of 7 ranks). Rank 7: 402–474 instead of 431–509.
• Higher spell power coefficient (2 of 7 ranks). Rank 2: 0.429 instead of 0.332.

Rank 2: 52–64 instead of 57–71; Rank 3: 90–110 instead of 103–127; Rank 4: 148–178 instead of 168–202; Rank 5: 215–257 instead of 242–290; Rank 6: 303–359 instead of 332–394; Rank 7: 402–474 instead of 431–509.

Classic Era (Rank 7): Blasts the enemy for 431 to 509 Fire damage.

Forever (Rank 7): Blasts the enemy for 402 to 474 Fire damage.

Arcane Missiles Changed

Tooltip changed.

• Tooltip text changed on 7 ranks; the numbers in both clients' spell data are the same.

Classic Era (Rank 8): Launches Arcane Missiles at the enemy, causing 230 Arcane damage each second for 5 sec.

Forever (Rank 8): Launches Arcane Missiles at the enemy, causing 209 Arcane damage each second for 5 sec.

Frost Nova Changed

Less damage (3 of 4 ranks); higher spell power coefficient (1 of 4 ranks).

• Less damage (3 of 4 ranks). Rank 4: 69–77 instead of 71–79.
• Higher spell power coefficient (1 of 4 ranks). Rank 1: 0.029 instead of 0.018.

Rank 2: 32–36 instead of 33–37; Rank 3: 50–56 instead of 52–58; Rank 4: 69–77 instead of 71–79.

Classic Era (Rank 4): Blasts enemies near the caster for 71 to 79 Frost damage and freezes them in place for up to 8 sec. Damage caused may interrupt the effect.

Forever (Rank 4): Blasts enemies near the caster for 69 to 77 Frost damage and freezes them in place for up to 8 sec. Damage caused may interrupt the effect.

Dampen Magic Changed

Stronger effect (all 5 ranks).

• Stronger effect (all 5 ranks). Rank 5: −135 instead of −90.

Rank 1: −15 instead of −10; Rank 2: −30 instead of −20; Rank 3: −60 instead of −40; Rank 4: −90 instead of −60; Rank 5: −135 instead of −90.

Classic Era (Rank 5): Dampens magic used against the targeted party member, decreasing damage taken from spells by up to 90 and healing spells by up to 180. Lasts 10 min.

Forever (Rank 5): Dampens magic used against the targeted party member, decreasing damage taken from spells by up to 135 and healing spells by up to 270. Lasts 10 min.

Arcane Explosion Changed

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

• Less damage (all 6 ranks). Rank 6: 232–252 instead of 243–263.
• Higher spell power coefficient (1 of 6 ranks). Rank 1: 0.143 instead of 0.111.

Rank 1: 30–34 instead of 32–36; Rank 2: 52–58 instead of 57–63; Rank 3: 90–98 instead of 97–105; Rank 4: 129–141 instead of 139–151; Rank 5: 175–191 instead of 186–202; Rank 6: 232–252 instead of 243–263.

Classic Era (Rank 6): Causes an explosion of arcane magic around the caster, causing 243 to 263 Arcane damage to all targets within 10 yards.

Forever (Rank 6): Causes an explosion of arcane magic around the caster, causing 232 to 252 Arcane damage to all targets within 10 yards.

Flamestrike Changed

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

• Less damage (all 6 ranks). Rank 6: 375–459 instead of 375–459 + 340 over 8 sec.
• Higher spell power coefficient (1 of 6 ranks). Rank 1: 0.157 instead of 0.134.

Rank 1: 52–68 instead of 52–68 + 48 over 8 sec; Rank 2: 96–122 instead of 96–122 + 88 over 8 sec; Rank 3: 154–192 instead of 154–192 + 140 over 8 sec; Rank 4: 220–272 instead of 220–272 + 196 over 8 sec; Rank 5: 291–359 instead of 291–359 + 264 over 8 sec; Rank 6: 375–459 instead of 375–459 + 340 over 8 sec.

Classic Era (Rank 6): Calls down a pillar of fire, burning all enemies within the area for 375 to 459 Fire damage and an additional 340 Fire damage over 8 sec.

Forever (Rank 6): Calls down a pillar of fire, burning all enemies within the area for 375 to 459 Fire damage and an additional 332 Fire damage over 8 sec. Only one Flamestrike can be active per Mage at a time.

Amplify Magic Changed

Stronger effect (all 4 ranks).

• Stronger effect (all 4 ranks). Rank 4: 113 instead of 75.

Rank 1: 23 instead of 15; Rank 2: 45 instead of 30; Rank 3: 75 instead of 50; Rank 4: 113 instead of 75.

Classic Era (Rank 4): Amplifies magic used against the targeted party member, increasing damage taken from spells by up to 75 and healing spells by up to 150. Lasts 10 min.

Forever (Rank 4): Amplifies magic used against the targeted party member, increasing damage taken from spells by up to 113 and healing spells by up to 225. Lasts 10 min.

Remove Lesser Curse Changed

Tooltip changed.

• Tooltip text changed on 1 rank; the numbers in both clients' spell data are the same.

Classic Era: Removes 1 Curse from a friendly target.

Forever: Removes 1 Curse or Bane from a friendly target.

Blink Changed

Tooltip changed.

• Tooltip text changed on 1 rank; the numbers in both clients' spell data are the same.

Classic Era: Teleports the caster 20 yards forward, unless something is in the way. Also frees the caster from stuns and bonds.

Forever: Teleports the caster 20 yards forward, unless something is in the way. Also frees the caster from Stuns and Immobilizes.

Blizzard Changed

Value no longer in the client.

• The Forever client has no number for these ranks: the server works it out (Classic Era Rank 6: 1192 over 8 sec).

Classic Era (Rank 6): Ice shards pelt the target area doing 1192 Frost damage over 8 sec.

Forever (Rank 6): Ice shards pelt the target area doing 1168 Frost damage over 8 sec.

Fire Ward Changed

Weaker effect (all 5 ranks).

• Weaker effect (all 5 ranks). Rank 5: 913 instead of 920.

Rank 1: 162 instead of 165; Rank 2: 285 instead of 290; Rank 3: 463 instead of 470; Rank 4: 668 instead of 675; Rank 5: 913 instead of 920.

Classic Era (Rank 5): Absorbs 920 Fire damage. Lasts 30 sec.

Forever (Rank 5): Absorbs 913 Fire damage. Lasts 30 sec.

Pyroblast Changed

Less damage (all 8 ranks); top rank's effect changed.

• Less damage (all 8 ranks). Rank 8: 520–646 + 212 over 12 sec instead of 716–890 + 268 over 12 sec.
• What the top rank does changed (tooltips below).

Rank 1: 95–125 + 44 over 12 sec instead of 141–187 + 56 over 12 sec; Rank 2: 116–152 + 56 over 12 sec instead of 180–236 + 72 over 12 sec; Rank 3: 167–215 + 76 over 12 sec instead of 255–327 + 96 over 12 sec; Rank 4: 216–274 + 100 over 12 sec instead of 329–419 + 124 over 12 sec; Rank 5: 275–347 + 124 over 12 sec instead of 407–515 + 156 over 12 sec; Rank 6: 350–438 + 152 over 12 sec instead of 503–631 + 188 over 12 sec; Rank 7: 428–534 + 184 over 12 sec instead of 600–750 + 228 over 12 sec; Rank 8: 520–646 + 212 over 12 sec instead of 716–890 + 268 over 12 sec.

Classic Era (Rank 1): Hurls an immense fiery boulder that causes 141 to 187 Fire damage and an additional 56 Fire damage over 12 sec.

Forever (Rank 1): Hurls an immense fiery boulder that causes 95 to 125 Fire damage and an additional 44 Fire damage over 12 sec.

Frost Ward Changed

Weaker effect (all 5 ranks).

• Weaker effect (all 5 ranks). Rank 5: 913 instead of 920.

Rank 1: 162 instead of 165; Rank 2: 284 instead of 290; Rank 3: 463 instead of 470; Rank 4: 668 instead of 675; Rank 5: 913 instead of 920.

Classic Era (Rank 5): Absorbs 920 Frost damage. Lasts 30 sec.

Forever (Rank 5): Absorbs 913 Frost damage. Lasts 30 sec.

Scorch Changed

Less damage (all 7 ranks).

• Less damage (all 7 ranks). Rank 7: 163–193 instead of 233–275.

Rank 1: 35–43 instead of 53–65; Rank 2: 50–60 instead of 77–93; Rank 3: 63–75 instead of 100–120; Rank 4: 85–101 instead of 133–159; Rank 5: 106–126 instead of 162–192; Rank 6: 137–163 instead of 200–239; Rank 7: 163–193 instead of 233–275.

Classic Era (Rank 7): Scorch the enemy for 233 to 275 Fire damage.

Forever (Rank 7): Scorch the enemy for 163 to 193 Fire damage.

Cone of Cold Changed

Less damage (all 5 ranks); duration 6 sec instead of 8 sec.

• Less damage (all 5 ranks). Rank 5: 325–355 instead of 335–365.
• Duration: 6 sec instead of 8 sec (all 5 ranks).

Rank 1: 92–102 instead of 98–108; Rank 2: 137–151 instead of 146–160; Rank 3: 194–214 instead of 203–223; Rank 4: 254–280 instead of 264–290; Rank 5: 325–355 instead of 335–365.

Classic Era (Rank 5): Targets in a cone in front of the caster take 335 to 365 Frost damage and are slowed by 50% for 8 sec.

Forever (Rank 5): Targets in a cone in front of the caster take 325 to 355 Frost damage and are slowed by 40% for 6 sec.

Blast Wave Changed

Less damage (all 5 ranks); top rank's effect changed.

• Less damage (all 5 ranks). Rank 5: 453–533 instead of 462–544.
• What the top rank does changed (tooltips below).

Rank 1: 148–178 instead of 154–186; Rank 2: 193–231 instead of 201–241; Rank 3: 268–318 instead of 277–329; Rank 4: 356–422 instead of 365–433; Rank 5: 453–533 instead of 462–544.

Classic Era (Rank 1): A wave of flame radiates outward from the caster, damaging all enemies caught within the blast for 154 to 186 Fire damage, and dazing them for 6 sec.

Forever (Rank 1): A wave of flame radiates outward from the caster, damaging all enemies caught within the blast for 148 to 178 Fire damage, and Dazing them for 50% reduced movement speed for 6 sec.

Mage Armor Changed

Tooltip changed.

• Tooltip text changed on 3 ranks; the numbers in both clients' spell data are the same.

Classic Era (Rank 3): Increases your resistance to all magic by 15 and allows 30% of your mana regeneration to continue while casting. Only one type of Armor spell can be active on the Mage at any time. Lasts 30 min.

Forever (Rank 3): Increases your resistance to all magic by 15 and allows 50% of your mana regeneration to continue while casting. Only one type of Armor spell can be active on the Mage at any time. Lasts 30 min.

Ice Barrier Changed

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

• Weaker effect (all 4 ranks). Rank 4: 811 instead of 818.
• What the top rank does changed (tooltips below).

Rank 1: 431 instead of 438; Rank 2: 542 instead of 549; Rank 3: 671 instead of 678; Rank 4: 811 instead of 818.

Classic Era (Rank 1): Instantly shields you, absorbing 438 damage. Lasts 1 min. While the shield holds, spells will not be interrupted.

Forever (Rank 1): Instantly shields you, absorbing 431 damage. Lasts 1 min. While the shield holds, your spellcasts will not be interrupted or delayed from taking damage.

Arcane Brilliance Changed

Rank 1 removed.

• Not in Forever: Rank 1 (Classic Era had 1 ranks).

Classic Era: Infuses the target's party with brilliance, increasing their Intellect by 31 for 1 hour.

Forever: Infuses the target's party and raid with brilliance, increasing their Intellect by 31 for 1 hour.

Changed Mage talents

Arcane Focus Changed

Top rank's effect changed.

• What the top rank does changed (tooltips below).

Classic Era (Rank 5): Reduces the chance that the opponent can resist your Arcane spells by 10%.

Forever (Rank 5): Improves your chance to hit with Arcane spells by 5%.

Elemental Precision Changed

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

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

Classic Era (Rank 5 (Era rank 3)): Reduces the chance that the opponent can resist your Frost and Fire spells by 6%.

Forever (Rank 5 (Era rank 3)): Improves your chance to hit with Frost and Fire spells by 5%.

Frost Warding Changed

Top rank's effect changed.

• What the top rank does changed (tooltips below).

Classic Era (Rank 2): Increases the armor and resistances given by your Frost Armor and Ice Armor spells by 30%. In addition, gives your Frost Ward a 20% chance to reflect Frost spells and effects while active.

Forever (Rank 2): Increases the Armor and resistance given by your Frost Armor and Ice Armor spells by 30%. In addition, gives your Frost Ward a 20% chance to reflect Frost spells and effects while active.

Improved Channeling Changed

Top rank's effect changed.

• What the top rank does changed (tooltips below).

Classic Era (Rank 5): Gives you a 100% chance to avoid interruption caused by damage while channeling Arcane Missiles.

Forever (Rank 5): Gives you a 100% chance to avoid interruption caused by damage while channeling Arcane Missiles and a 70% chance while casting Arcane Blast.

Improved Fireball Changed

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

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

Classic Era (Rank 5): Reduces the casting time of your Fireball spell by 0.5 sec.

Forever (Rank 5): Reduces the casting time of your Fireball and Frostfire Bolt spells by 0.5 sec.

Incineration Changed (Classic Era: Incinerate)

Moved to tier 1; renamed from Incinerate; 3 ranks instead of 2; top rank's effect changed.

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

Classic Era (Rank 3 (Era rank 2)): Increases the critical strike chance of your Fire Blast and Scorch spells by 4%.

Forever (Rank 3 (Era rank 2)): Increases the critical strike chance of your Fire Blast, Ice Lance, Arcane Blast, and Scorch spells by 6%.

Wake of Fire Changed (Classic Era: Improved Fire Blast)

Moved to tier 1; renamed from Improved Fire Blast; 2 ranks instead of 3; top rank's effect changed.

• Renamed: Improved Fire Blast in Classic Era.
• Moved: Fire tier 2, column 3 in Classic Era; Fire tier 1, column 1 in Forever.
• 2 ranks in Forever; Classic Era had 3.
• What the top rank does changed (tooltips below).

Classic Era (Rank 2 (Era rank 3)): Reduces the cooldown of your Fire Blast spell by 1.5 sec.

Forever (Rank 2 (Era rank 3)): Reduces the cooldown of your Fire Blast spell by 2 sec. Killing a non-trivial target increases the critical strike chance of your next Fire Blast cast within 30 sec by 50%.

Wand Specialization Changed

Moved to tier 1.

• Moved: Arcane tier 2, column 1 in Classic Era; Arcane tier 1, column 1 in Forever.

Arcane Resilience Changed

Moved to tier 2; 2 ranks instead of 1.

• Moved: Arcane tier 3, column 3 in Classic Era; Arcane tier 2, column 4 in Forever.
• 2 ranks in Forever; Classic Era had 1.

Arcane Subtlety Changed

Moved to tier 2; top rank's effect changed.

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

Classic Era (Rank 2): Reduces your target's resistance to all your spells by 10 and reduces the threat caused by your Arcane spells by 40%.

Forever (Rank 2): Reduces your target's resistance to all your spells by 15 and reduces the threat caused by your Arcane spells by 30%.

Frostbite Changed

Moved to tier 2.

• Moved: Frost tier 2, column 2 in Classic Era; Frost tier 2, column 4 in Forever.

Impact Changed

Moved to tier 2; 3 ranks instead of 5.

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

Magic Absorption Changed

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

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

Classic Era (Rank 2 (Era rank 5)): Increases all resistances by 10 and causes all spells you fully resist to restore 5% of your total mana. 1 sec. cooldown.

Forever (Rank 2 (Era rank 5)): Increases all your resistances by 10 and causes all spells you fully resist to restore 2% of your total mana. Cannot trigger more often than 1 time per sec.

Permafrost Changed

Moved to tier 2; top rank's effect changed.

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

Classic Era (Rank 3): Increases the duration of your Chill effects by 3 secs and reduces the target's speed by an additional 10%.

Forever (Rank 3): Increases the duration of your Chill effects by 33% and reduces the target's speed by an additional 10%.

Arcane Geometry Changed

Top rank's effect changed.

• What the top rank does changed (tooltips below).

Classic Era (Rank 2): Increases the effect of your Amplify Magic and Dampen Magic spells by 50%.

Forever (Rank 2): Increases the range of your Arcane spells by 6 yards.

Arcane Impact Changed

Top rank's effect changed.

• What the top rank does changed (tooltips below).

Classic Era (Rank 3): Increases the critical strike chance of your Arcane Explosion spell by an additional 6%.

Forever (Rank 3): Increases the critical strike chance of your Arcane spells by 6%.

Burning Soul Changed

Moved to tier 3; 3 ranks instead of 2.

• Moved: Fire tier 3, column 4 in Classic Era; Fire tier 3, column 1 in Forever.
• 3 ranks in Forever; Classic Era had 2.

Frost Channeling Changed

Moved to tier 3.

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

Improved Blizzard Changed

Top rank's effect changed.

• What the top rank does changed (tooltips below).

Classic Era (Rank 3): Adds a chill effect to your Blizzard spell. This effect lowers the target's movement speed by 65%. Lasts 1.5 sec.

Forever (Rank 3): Adds a Chill effect to your Blizzard spell. This effect lowers the target's movement speed by 40% for 1.5 sec.

Arcane Meditation Changed

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

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

Classic Era (Rank 3): Allows 15% of your Mana regeneration to continue while casting.

Forever (Rank 3): Allows 50% of your Mana regeneration to continue while casting.

Arcane Shielding Changed

Top rank's effect changed.

• What the top rank does changed (tooltips below).

Classic Era (Rank 2): Decreases the mana lost per point of damage taken when Mana Shield is active by 20%.

Forever (Rank 2): Decreases the Mana lost per point of damage taken when your Mana Shield spell is active by 33% and increases the resistances granted by your Mage Armor spell by 50%.

Ice Block Changed

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

• Moved: Frost tier 5, column 2 in Classic Era; Frost tier 4, column 2 in Forever.
• What the top rank does changed (tooltips below).

Classic Era (Rank 1): You become encased in a block of ice, protecting you from all physical attacks and spells for 10 sec, but during that time you cannot attack, move or cast spells.

Forever (Rank 1): You become encased in a block of ice, protecting you from all physical attacks and spells for 10 sec, but during that time you cannot attack, move, or cast spells.

Improved Counterspell Changed

Top rank's effect changed.

• What the top rank does changed (tooltips below).

Classic Era (Rank 2): Gives your Counterspell a 100% chance to silence the target for 4 sec.

Forever (Rank 2): Your Counterspell also Silences the target for 4 sec.

Improved Scorch Changed

Top rank's effect changed.

• What the top rank does changed (tooltips below).

Classic Era (Rank 3): Your Scorch spells have a 100% chance to cause your target to be vulnerable to Fire damage. This vulnerability increases the Fire damage dealt to your target by 3% and lasts 30 sec. Stacks up to 5 times.

Forever (Rank 3): Your Scorch spell has a 100% chance to cause your target to be vulnerable to Fire damage. This vulnerability increases all Fire damage you deal to your target by 3% and lasts 30 sec, stacking up to 5 times.

Master of Elements Changed

Top rank's effect changed.

• What the top rank does changed (tooltips below).

Classic Era (Rank 3): Your Fire and Frost spell criticals will refund 30% of their base mana cost.

Forever (Rank 3): Your Fire and Frost critical strikes will refund 30% of their base mana cost.

Shatter Changed

Moved to tier 4; 3 ranks instead of 5.

• Moved: Frost tier 4, column 3 in Classic Era; Frost tier 4, column 4 in Forever.
• 3 ranks in Forever; Classic Era had 5.

Arcane Mind Changed

Top rank's effect changed.

• What the top rank does changed (tooltips below).

Classic Era (Rank 5): Increases your maximum Mana by 10%.

Forever (Rank 5): Increases your Intellect by 10% and increases the critical strike damage bonus of your Arcane spells by 100%.

Cold Snap Changed

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

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

Classic Era (Rank 1): When activated, this spell finishes the cooldown on all of your Frost spells.

Forever (Rank 1): Finishes the remaining cooldown on all your other Frost spells.

Improved Cone of Cold Changed

Moved to tier 5.

• Moved: Frost tier 5, column 3 in Classic Era; Frost tier 5, column 1 in Forever.

Arcane Instability Changed

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

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

Classic Era (Rank 3): Increases your spell damage and critical strike chance by 3%.

Forever (Rank 3): Increases the damage done by your spells by 3% and your critical strike chance by 3%.

Winter's Chill Changed

Top rank's effect changed.

• What the top rank does changed (tooltips below).

Classic Era (Rank 5): Gives your Frost damage spells a 100% chance to apply the Winter's Chill effect, which increases the chance a Frost spell will critically hit the target by 2% for 15 sec. Stacks up to 5 times.

Forever (Rank 5): Gives your Frost damage spells a 100% chance to apply the Winter's Chill effect, which increases the chance your Ice Lance and Frostbolt spells will critically hit the target by 2% for 15 sec. Stacks up to 5 times.

Arcane Power Changed

Top rank's effect changed.

• What the top rank does changed (tooltips below).

Classic Era (Rank 1): When activated, your spells deal 30% more damage while costing 30% more mana to cast. This effect lasts 15 sec.

Forever (Rank 1): For the next 15 sec, your spells deal 30% more damage while costing 30% more mana to cast.

Combustion Changed

Top rank's effect changed.

• What the top rank does changed (tooltips below).

Classic Era (Rank 1): When activated, this spell causes each of your Fire damage spell hits to increase your critical strike chance with Fire damage spells by 10%. This effect lasts until you have caused 3 critical strikes with Fire spells.

Forever (Rank 1): When activated, this spell causes each of your Fire damage spell hits to increase your critical strike chance with Fire damage spells by 10%. This effect lasts until you have caused 3 non-periodic critical strikes with Fire spells.

Also changed as talents: Pyroblast, Blast Wave, Ice Barrier (under Changed spells).

Classic Mage spells and talents not in Forever

Detect Magic Removed

Classic Era ability (level 16) with no record in the Forever client.

• On Classic Era's Mage ability list (level 16, 1 rank); the Forever client has no record of it.

Classic Era: Detects beneficial magic effects on the target for 2 min.

Season of Discovery leftovers

Speculation: these 12 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.

• Expanded Intellect
• Living Flame
• Arcane Barrage
• Arcane Surge
• Balefire Bolt
• Frozen Orb
• Icy Veins
• Living Bomb
• Mass Regeneration
• Regeneration
• Rewind Time
• Spellfrost Bolt

Unchanged Mage abilities

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

• Fire Vulnerability
• Frost Armor
• Conjure Food
• Polymorph
• Clearcasting
• Slow Fall
• Evocation
• Mana Shield
• Teleport: Ironforge
• Teleport: Orgrimmar
• Teleport: Stormwind
• Teleport: Undercity
• Counterspell
• Conjure Mana Agate
• Ice Armor
• Teleport: Darnassus
• Teleport: Thunder Bluff
• Conjure Mana Jade
• Portal: Ironforge
• Portal: Orgrimmar
• Portal: Stormwind
• Portal: Undercity
• Conjure Mana Citrine
• Portal: Darnassus
• Portal: Thunder Bluff
• Conjure Mana Ruby
• Felfire
• Polymorph: Cow

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.