Makazradon is one of two massive pit lords found at Legion Hold in Shadowmoon Valley. He and his companion, Morgroron, wield weapons crafted with powerful anti-demon enchantments intended for use against Illidan.
These demons and their weapons are the subjects of the quest 
[69] Capture the Weapons.
Warlocks are no longer able to enslave this demon as of Patch 2.3.