Sunken Temple
Dungeon, level 45+. 11 quests, with where to get each one and what the quest giver looks like.
Quests
Into The Temple of Atal'Hakkar (level 50, Alliance)
Gather 10 Atal'ai Tablets for Brohann Caskbelly in Stormwind.
Get it from: Brohann Caskbelly <Explorers' League>, Stormwind City (69.5, 40.4). Requires level 41. First: Rhapsody's Tale. Classic data, not yet confirmed in Forever
The Temple of Atal'Hakkar (level 50, Horde)
Collect 20 Fetishes of Hakkar and bring them to Fel'Zerul in Stonard.
Get it from: Fel'zerul, Swamp of Sorrows, at Stonard (47.9, 54.8). Requires level 38. First: Return to Fel'Zerul. Classic data, not yet confirmed in Forever
Into the Depths (level 51)
Find the Altar of Hakkar in the Sunken Temple in Swamp of Sorrows.
Get it from: Marvon Rivetseeker, Tanaris (52.7, 45.9). Requires level 46. First: The Stone Circle. Classic data, not yet confirmed in Forever
Secret of the Circle (level 51)
Travel into the Sunken Temple and discover the secret hidden in the circle of statues.
Get it from: Marvon Rivetseeker, Tanaris (52.7, 45.9). Requires level 46. First: The Stone Circle. Classic data, not yet confirmed in Forever
The Sunken Temple (level 51, Horde)
Find Marvon Rivetseeker in Tanaris.
Get it from: Witch Doctor Uzer'i, Feralas, at Camp Mojache (74.4, 43.4). Requires level 46. Classic data, not yet confirmed in Forever
Blood of Morphaz (level 52)
Kill Morphaz in the sunken temple of Atal'Hakkar, and return his blood to Greta Mosshoof in Felwood. The entrance to the sunken temple can be found in the Swamp of Sorrows.
Get it from: Ogtinc, Azshara (42.4, 42.6). Requires level 50. First: The Ichor of Undeath. Classic data, not yet confirmed in Forever
Zapper Fuel (level 52, Horde)
Deliver the Unloaded Zapper and 5 samples of Atal'ai Haze to Larion in Marshal's Refuge.
Get it from: Liv Rizzlefix <Workshop Assistant>, Durotar (33.0, 79.8). Requires level 47. First: Marvon's Workshop. Classic data, not yet confirmed in Forever
Jammal'an the Prophet (level 53)
The Atal'ai Exile in The Hinterlands wants the Head of Jammal'an.
Get it from: Atal'ai Exile, The Hinterlands (33.8, 75.2). Requires level 38. Classic data, not yet confirmed in Forever
The God Hakkar (level 53)
Bring the Filled Egg of Hakkar to Yeh'kinya in Tanaris.
Get it from: Yeh'kinya, Tanaris (67.0, 22.4). Requires level 40. First: The Ancient Egg. Classic data, not yet confirmed in Forever
The Essence of Eranikus (level 55)
Place the Essence of Eranikus in the Essence Font located in this lair in the Sunken Temple.
Get it from: unknown. Requires level 48. Classic data, not yet confirmed in Forever
Eranikus, Tyrant of the Dream (level 60)
Travel to the continent of Teldrassil and find Malfurion's agent somewhere outside the walls of Darnassus.
Get it from: Malfurion Stormrage, inside Sunken Temple (appears during the run). Requires level 60. Classic data, not yet confirmed in Forever
Bosses
Avatar of Hakkar, Atal'alarion, Jammal'an the Prophet, Dreamscythe, Festering Rotslime, Weaver, Atal'ai Defenders, Shade of Eranikus, Dreamscythe and Weaver, Hazzas, Morphaz, Jammal'an and Ogom, Morphaz and Hazzas
Classic quest data from CMaNGOS classic-db (GPL-3.0); maps, models and confirmed quests from WoW Forever.