Spry and Mighty is a rare Sorcery card from Lorwyn Eclipsed Promos (PECL), collector number 195p. Current market price: $0.29 (foil $1.08), TCGplayer market prices via Scryfall.
Choose exactly two creatures you control. You draw X cards and the chosen creatures get +X/+X and gain trample until end of turn, where X is the difference between the chosen creatures' powers.