Intellect Devourer is a rare Creature — Horror card from Battle for Baldur's Gate Promos (PCLB), collector number 132s. Current market price: — (foil $2.32), TCGplayer market prices via Scryfall.
Devour Intellect — When this creature enters, each opponent exiles a card from their hand until this creature leaves the battlefield. Body Thief — You may play lands and cast spells from among cards exiled with this creature. If you cast a spell this way, you may spend mana as though it were mana of any color to cast it.