Dueling Rapier is a common Artifact — Equipment card from Adventures in the Forgotten Realms (AFR), collector number 140. Current market price: $0.31 (foil $0.35), TCGplayer market prices via Scryfall.
Flash When this Equipment enters, attach it to target creature you control. Equipped creature gets +2/+0. Equip {4} ({4}: Attach to target creature you control. Equip only as a sorcery.)