Admiral Beckett Brass is a mythic Legendary Creature — Human Pirate card from Ixalan (XLN), collector number 217. Current market price: $0.37 (foil $1.95), TCGplayer market prices via Scryfall.
Other Pirates you control get +1/+1. At the beginning of your end step, gain control of target nonland permanent controlled by a player who was dealt combat damage by three or more Pirates this turn.