Bronze Guardian is a rare Artifact Creature — Golem card from Commander 2021 (C21), collector number 13. Current market price: $1.65, TCGplayer market prices via Scryfall.
Double strike Ward {2} (Whenever this creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays {2}.) Other artifacts you control have ward {2}. Bronze Guardian's power is equal to the number of artifacts you control.