The Tol'vir are a race of "stone-like cat people" created by the titans that originate and dwell in the zones of Uldum. They were created to maintain titan repositories and machinery. There was once another society of tol'vir in Northrend, but they were overthrown by the Nerubians and transformed into Obsidian destroyers. It is possible that some of the original Tol'vir in Northrend still exists deep within the remnants of Azjol-Nerub. The tol'vir in Uldum seem to be somehow connected with Al'Akir and his elemental minions.