Molydeus

A molydeus, one of the police demons that enforce tanar'ri participation in the Blood War.  Though they technically rank below balors, even rogue balors are not above the reproach of molydeus enforcement.  The molydeus is recognizable by its deep crimson skin and the two heads, one of a snarling wolf in the front and one of a venomous serpent.  The great axe is the signature weapon of the molydeus and it disappears if the fiend is ever slain.