The illithid, or mind flayer, is an evil and feared creature of the Underdark; its powers are formidable and it feeds on the brains of any creature it encounters. Using arcane powers, it enslaves or destroys its foes, which include such powerful creatures as drow and kuo-toa.
Mind flayer / Illithid - The mind flayer, also called the illithid, is an evil and sadistic being, humanoid in appearance but with a four-tentacled octopus-like head. These beings are feared throughout the Underdark for their telepathic abilities and usually are not without two or more slaves, mentally bound, to each individual mind flayer.
An ulitharid towers over other mind flayers, standing at least nine feet in height. It possesses six tentacles, including two almost as long as its entire body. Its skin is a darker purple than other illithids, and it favors elaborate robes, spreading collars, and often high-crowned headdresses. Ulitharids eclipse common mind flayers in both size and psychic potency, and are viewed almost as minor deities by other illithids.