Mind Flayer

Mind flayers are monsters with the ability to drain intelligence. Some are found in the Athkatla Sewers in the Mind Flayer lair, in the Mind Flayer Dungeon in the Underdark, and in Sendai's Enclave. There are some offshoots, including the highly magic-resistant and spellcasting Ulitharid and Vampiric Illithids. Umber Hulks are often found with mind flayers.