Temple of Atal'Hakkar (also known as Sunken Temple and more rarely, Lost Temple) was a shrine erected by the Atal'ai trolls, led by their master Jammal'an the Prophet, to the nefarious Blood God — Hakkar the Soulflayer. Believing that this was the intended site for Hakkar's reentry into Azeroth, the great Dragon Aspect, Ysera, and her green dragonflight sunk the temple into the depths of the Swamp of Sorrows...but the dragons did not realize that it was the wrong location until it was too late.