Lanzuul is a hypothetical demon boss that may or may not be appearing in the [[Diablo III]] expansion. Maybe Lanzuul appears because of a power vacuum in the [[Burning Hells]].

The name is originally known from the concept art by Victor Lee along with a picture of a monster called [[Lanzuul's Minion]], which was displayed at the [[Blizzard Museum]] at Blizzcon 2010. That monster has not been seen in the game, nor has it been mentioned anywhere else to this point.