Frostfist Strider is a uncommon Creature — Elemental Giant card from Dominaria United (DMU), collector number 51. Current market price: $0.16 (foil $0.27), TCGplayer market prices via Scryfall.
Ward {2} (Whenever this creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays {2}.) When this creature enters, tap target creature an opponent controls and put a stun counter on it. (If a permanent with a stun counter would become untapped, remove one from it instead.)