Intellect Devourer

Intellect Devourer #1
Bred by Mind-Flayers in the deepest Underdark, these 'four-legged brains' stalk intelligent prey, co-opting their bodies after devouring their brain.

Intellect Devourer #2
A thoroughly repugnant creature, the Waterdhavian Intellect Devourer radiates evil. You cannot read its strange features, but only a fool would think it friendly.