Sting, Bilbo's Sword is a rare Legendary Artifact — Equipment card from The Hobbit (HOB), collector number 178. Current market price: $0.35 (foil $0.47), TCGplayer market prices via Scryfall.
Flash When Sting enters, put a hone counter on Sting for each creature target opponent controls. Attach Sting to up to one target creature you control. (Each hone counter on an Equipment grants +1/+0 to equipped creature.) Equip {3}