Lyev Skyknight is a uncommon Creature — Human Knight card from Return to Ravnica (RTR), collector number 179. Current market price: $0.19 (foil $0.46), TCGplayer market prices via Scryfall.
Flying When this creature enters, detain target nonland permanent an opponent controls. (Until your next turn, that permanent can't attack or block and its activated abilities can't be activated.)