Uvuudaum

The uvuudaums were lords of the Far Realm.

Description
They had a large stinger where a humanoid head would usually be located, atop a misshapen torso with two arms and eight grotesque-looking legs, arranged much like a spider. Merely being in the presence of an uvuudaum could drive most creatures insane.

History
In, the Purple Claws mercenary company accidentally entered the lair of an uvuudaum during an expedition to Throrgar in the Underdark. Every member of the company was killed by the uvuudaum's mooncalf minions.