Up until the invasion of Azeroth, Gul'dan's background was basically conterminous with that of his "Coreverse" counterpart, with a few changes. When it later was made clear to the orcs of the Horde that they were being controlled by Deathwing, the shaman-turned-warlock turned into a devout worshiper of Deathwing, whether for personal gain or real beliefs is unclear. What is known is that he now leads the order of mighty clerics drawing their power directly from the Dread Aspect. His base of operations is his own semi-autonomous city-state of Argumar, build on the ancient ruins of the high elven capital of Silvermoon.