Sly Spy is a uncommon Creature — Human Spy card from Unstable (UST), collector number 67c. Current market price: $0.44 (foil $12.00), TCGplayer market prices via Scryfall.
Whenever this creature deals combat damage to a player, that player loses a finger until this creature leaves the battlefield. (The finger is chosen by its owner and can't roll dice or touch cards.)