Tidehollow Sculler is a uncommon Artifact Creature — Zombie card from Shards of Alara (ALA), collector number 202. Current market price: $0.24 (foil $2.70), TCGplayer market prices via Scryfall.
When this creature enters, target opponent reveals their hand and you choose a nonland card from it. Exile that card. When this creature leaves the battlefield, return the exiled card to its owner's hand.