Mind flayers, also known as illithids, are fictional creatures from the Dungeons & Dragons role-playing game. They are characterized by their humanoid bodies, tentacled faces, and psionic abilities. Mind flayers are known for their intelligence and cunning, often using their mental powers to manipulate others. These creatures typically dwell in underground lairs and are infamous for their practice of consuming the brains of sentient beings. This act not only sustains them but also allows them to gain knowledge and memories from their victims. Mind flayers often form communities called colonies, where they work together to achieve their goals.