Bulk Up is a uncommon Instant card from Secrets of Strixhaven Mystical Archive (SOA), collector number 170. Current market price: — (foil $8.02), TCGplayer market prices via Scryfall.
Double target creature's power until end of turn. Flashback {4}{R}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)