Tidehollow Sculler is a uncommon Artifact Creature — Zombie card from Modern Event Deck 2014 (MD1), collector number 2. Current market price: $0.14, 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.