Oona, Queen of the Fae is a rare Legendary Creature — Faerie Wizard card from Shadowmoor (SHM), collector number 172. Current market price: $2.31 (foil $78.29), TCGplayer market prices via Scryfall.
Flying {X}{U/B}: Choose a color. Target opponent exiles the top X cards of their library. For each card of the chosen color exiled this way, create a 1/1 blue and black Faerie Rogue creature token with flying.