Skull Warren is a cave at the middle section of the eastern face of Dreadmaul Rock in the Burning Steppes. Part of Firegut Ogre territory for years, since their alliance with the Blackrock clan the cave has been taken over by the Blackrock as a training ground for their warlocks, overseen by High Warlock Xi'lun.
Patch changes
Patch 5.0.4 (2012-08-28): Cavern given its own subzone.