Pirate's Cutlass is a common Artifact — Equipment card from Ixalan (XLN), collector number 242. Current market price: $0.08 (foil $0.45), TCGplayer market prices via Scryfall.
When this Equipment enters, attach it to target Pirate you control. Equipped creature gets +2/+1. Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery.)