Arna Kennerüd, Skycaptain is a mythic Legendary Creature — Human Knight card from Modern Horizons 3 (MH3), collector number 371. Current market price: $1.04 (foil $4.79), TCGplayer market prices via Scryfall.
Flying, lifelink Ward—Discard a card. Whenever a modified creature you control attacks, double the number of each kind of counter on it. Then for each nontoken permanent attached to it, create a token that's a copy of that permanent attached to that creature.