2021-8-13 · "Mind flayers might comprise the single most dangerous threat to the dominion of humanoids in the daylight lands of the surface world." Lords of Madness, page 4 The illithid, commonly known as the mind flayer, is an aberrant humanoid best recognized by its tentacled mouth, which it uses to suck out and consume humanoid brains. It is highly intelligent, and feared for its powerful psionic ...