Malcolm, Alluring Scoundrel is a rare Legendary Creature — Siren Pirate card from The Lost Caverns of Ixalan (LCI), collector number 63. Current market price: $3.06 (foil $3.96), TCGplayer market prices via Scryfall.
Flash Flying Whenever Malcolm deals combat damage to a player, put a chorus counter on it. Draw a card, then discard a card. If there are four or more chorus counters on Malcolm, you may cast the discarded card without paying its mana cost.