Thieving Sprite is a common Creature — Faerie Rogue card from Modern Masters (MMA), collector number 101. Current market price: $0.18 (foil $0.38), TCGplayer market prices via Scryfall.
Flying When this creature enters, target player reveals X cards from their hand, where X is the number of Faeries you control. You choose one of those cards. That player discards that card.