Malcolm, Keen-Eyed Navigator is a uncommon Legendary Creature — Siren Pirate card from Special Guests (SPG), collector number 2. Current market price: $7.32 (foil $15.12), TCGplayer market prices via Scryfall.
Flying Whenever one or more Pirates you control deal damage to your opponents, you create a Treasure token for each opponent dealt damage. (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.") Partner (You can have two commanders if both have partner.)