The Waterdhavian Intellect Devourer was sent to Neverwinter from Waterdeep in the hopes that it could provide a component to the spell that would cure the Wailing Death. It was kept in the Neverwinter Academy while the spell was prepared. Once the Academy was attacked, however, the Intellect Devourer disappeared into the city.
- "Bred by Mind-Flayers in the deepest Underdark, these 'four-legged brains' stalk intelligent prey, co-opting their bodies after devouring their brain." (Prologue)
The Waterdhavian Intellect Devourer appears in the original campaign of Neverwinter Nights.