An abominable horror from deep beneath the earth, an umber hulk burrows into cave complexes, dungeons, or Underdark settlements in search of food—especially the humanoid prey it craves. Those lucky enough to survive an umber hulk attack often remember precious little of the incident, thanks to the umber hulk’s mind-scrambling gaze.
An umber hulk is a juggernaut of the Underdark, and more than a match for most groups of subterranean travelers. Fortunately for its prey, an umber hulk usually hunts alone. Resembling a cross between a great ape and a beetle, an umber hulk has a broad, sharp-toothed mouth between an enormous pair of scythe-like mandibles. Armored plates cover its massive frame, with scattered feelers poking from its body like sparse hair. Four eyes adorn its rounded head—two like an ape’s eyes, and two compound beetle eyes that confuse any creature meeting the umber hulk’s gaze.
Umber hulks can burrow through solid rock, forming new tunnels in their wake. Rubble flies behind them as they move, and experienced creatures that hear the telltale clamor of an umber hulk’s digging know to keep well away. A burrowing umber hulk rampages through tunnels and caverns without concern for the destruction caused by its digging. The steel-hard chitin of its body can withstand the cave-ins, tunnel collapses, and rock falls that commonly follow it.