Coalition Skyknight is a uncommon Creature — Human Knight card from Dominaria United (DMU), collector number 14. Current market price: $0.12 (foil $0.14), TCGplayer market prices via Scryfall.
Flying Enlist (As this creature attacks, you may tap a nonattacking creature you control without summoning sickness. When you do, add its power to this creature's until end of turn.)