Busaw

Busaw, Eater of Manflesh is a unique Demon Trooper that will always spawn while climbing the stairs for the event Crazy Climber in Diablo III. He has Frozen, Molten, and Plagued affixes, sometimes being called 'pool trooper' for that set. That set of affixes is making combat especially tricky considering that the battle for the tower takes place on a very narrow serpentine ladder.

Trivia
Busaw is a Philippine legendary creature (the closest equivalent in European folklore would be a ghoul-like Undead ogre) that steals and devours corpses.