Years ago, in the ruined temple of Atal'Hakkar, loyal priests of the Blood God Hakkar the Soulflayer attempted to summon the wrathful deity's avatar into the world. But his followers, the Atal'ai priesthood, discovered that the Soulflayer could only be summoned within the Gurubashi tribe's ancient capital, Zul'Gurub. Newly reborn in this jungle fortress, Hakkar took control of the Gurubashi tribe and mortal champions of the trolls' mighty animal gods. The Soulflayer's dark influence was barely halted when the wise Zandalari tribe recruited heroes from the Horde and the Alliance and staged an invasion of Zul'Gurub.