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Forgotten Realms Wiki has an article about: Mind flayers

"This strange, humanoid-shaped being stands about as tall as a human. Its flesh is rubbery and greenish-mauve, glistening with slime. The creature's head looks rather like a four-tentacled octopus, made all the more horrible by a pair of bloated white eyes."

Illithid render

Mind flayers, also known as Illithids, are monstrous humanoid aberrations with psionic powers. They live in the moist caverns and cities of the enormous Underdark. They believe themselves to be the dominant species of the multiverse, and use other intelligent creatures as thralls, slaves, and cattle.

Illithids have four octopus-like tentacles around a beaked or lamprey-like mouth, and require the brains of sentient creatures as part of their diet. An illithid who snares a living creature in all four of its tentacles can extract and devour its living brain. One of the most feared powers is the dreaded Mind Blast, where the illithid emits a cone-shaped psionic shockwave to incapacitate any creature with its mind for a short amount of time. Illithids also have other psionic powers, generally telepathic in nature, although their exact effects have varied over editions. Other powers include a defensive psionic shield and powers of psionic domination for controlling the minds of others.



  • Because NWN2 does not implement the mechanics of psionics, the mind flayer's psionic powers are treated as spell-like abilities.