Thieving Sprite is a common Creature — Faerie Rogue card from Lorwyn (LRW), collector number 143. Current market price: $0.25 (foil $1.60), 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.