Mindreaver is a rare Creature — Human Wizard card from Born of the Gods (BNG), collector number 44. Current market price: $0.12 (foil $0.69), TCGplayer market prices via Scryfall.
Heroic — Whenever you cast a spell that targets this creature, exile the top three cards of target player's library. {U}{U}, Sacrifice this creature: Counter target spell with the same name as a card exiled with this creature.