A purgatory monster sent to Antharas by Shilen. The Behemoth Leader who came above ground was filled with uncontrollable madness as soon as it was unshackled. It killed countless monsters and eventually even tore off some of the flesh of Antharas, its master. Antharas burst into laughter at its foolish actions, and he cast a spell so that it would guard the Essence of Antharas, which maintains the dungeon's barrier.