Savage Swipe is a common Sorcery card from Modern Horizons (MH1), collector number 178. Current market price: $0.15 (foil $0.16), TCGplayer market prices via Scryfall.
Target creature you control gets +2/+2 until end of turn if its power is 2. Then it fights target creature you don't control. (Each deals damage equal to its power to the other.)