Emberwilde Captain is a rare Creature — Djinn Pirate card from Commander Legends (CMR), collector number 175. Current market price: $2.23 (foil $1.76), TCGplayer market prices via Scryfall.
When this creature enters, you become the monarch. Whenever an opponent attacks you while you're the monarch, this creature deals damage to that player equal to the number of cards in their hand.