Deadeye Plunderers is a uncommon Creature — Human Pirate card from Ixalan (XLN), collector number 220. Current market price: $0.27 (foil $0.47), TCGplayer market prices via Scryfall.
This creature gets +1/+1 for each artifact you control. {2}{U}{B}: Create a Treasure token. (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.")