Pirate Hat is a common Artifact — Equipment card from The Lost Caverns of Ixalan (LCI), collector number 70. Current market price: $0.28 (foil $0.27), TCGplayer market prices via Scryfall.
Equipped creature gets +1/+1 and has "Whenever this creature attacks, draw a card, then discard a card." Equip Pirate {1} Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery.)