Assassin Gauntlet is a uncommon Artifact — Equipment card from Assassin's Creed (ACR), collector number 12. Current market price: $0.31 (foil $0.33), TCGplayer market prices via Scryfall.
When this Equipment enters, attach it to up to one target creature you control. Tap all creatures target opponent controls. Equipped creature gets +1/+1 and has "Whenever this creature deals combat damage to a player, draw a card, then discard a card." Equip {2}