From WoWWiki

Mok'Doom is an area of Lower Blackrock Spire, and the domain of the Stonespire ogres. It is ruled by Highlord Omokk, who has been granted a boon by Urok Doomhowl. This boon ensures that any ogre who challenges Omokk, is struck dead by magic. Thus, only a non-ogre could kill Omokk. Mok'Doom itself is a dead-end area that is reached by a short stone bridge leading from the upper reaches of Hordemar City.

Subzones of Blackrock Spire
Blackrock Stadium • Chamber of Battle • Dragonspire Hall • The Furnace • Hall of Binding • Hall of Blackhand • Halycon's Lair • Hordemar City • Mok'Doom • The Rookery • Skitterweb Tunnels • Spire Throne • The Storehouse • Tazz'Alaor