Mind Flayers or Illithids are a non-playable race in Baldur's Gate 3. They are a type of Aberration. The Githyanki word for a Mind Flayer is ghaik.
Mind Flayers are psionic aberrations with a humanoid-like figure and a tentacled head that communicate using telepathy. They feast on the brains of intelligent beings and can enthrall other creatures to their will. Every Mind Flayer is connected to an Elder Brain, a colossal and powerful psionic brain that commands the Mind Flayers it is linked to.
Mind Flayers reproduce by infecting other creatures with a Mind Flayer Tadpole, which consumes its host from the inside, transforming them into another Mind Flayer in a process called Ceremorphosis.
Thousands of years ago, Mind Flayers were a dominant planar power. Using massive flying vessels called Nautiloids, they traveled to hundreds of worlds, harvesting intelligent humanoids to consume, propagate their race, and use as slave labour. One of their enslaved races, the Githyanki, rose up and destroyed their empire, leaving only small pockets of Mind Flayers behind.
A Mind Flayer in Early Access