Intellect Devourer — Battle for Baldur's Gate Promos #132s

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.