Umber Hulk
Umber hulks are massive creatures that dwell deep beneath the earth.  Ripping through rock as though it were light underbrush, they rampage continuously leaving a wake of destruction.  An umber hulk is powerfully built, looking something like a cross between a great ape and a beetle.  The wedged-shaped creature stands roughly 8 feet tall and measures nearly 5 feet across, weighing about 800 pounds.  Armor plates cover virtually all of its chitinous body, whose scattered feelers resemble sparse hair.  The low rounded head is dominated by a massive pair of mandibles and rows of triangular teeth.  Umber hulks speak their own language.