Blizzard Brawl is a uncommon Snow Sorcery card from Kaldheim (KHM), collector number 162. Current market price: $0.32 (foil $0.30), TCGplayer market prices via Scryfall.
Choose target creature you control and target creature you don't control. If you control three or more snow permanents, the creature you control gets +1/+0 and gains indestructible until end of turn. Then those creatures fight each other. (Each deals damage equal to its power to the other.)