Illithids, also known as mind flayers, are a fictional race of creatures in the Dungeons & Dragons universe. They are characterized by their octopus-like heads, which feature tentacles, and their ability to consume the brains of other beings. Illithids are known for their powerful psionic abilities, allowing them to manipulate minds and control others. These creatures typically dwell in underground lairs and are often depicted as malevolent beings seeking to dominate or enslave other races. Illithids are part of a larger society, often organized into groups called colonies, and they are known to use thralls—enslaved beings—to do their bidding.