Oona, Queen of the Fae is a rare Legendary Creature — Faerie Wizard card from Modern Masters (MMA), collector number 193. Current market price: $1.62 (foil $15.97), 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.