Urza, Prince of Kroog is a rare Legendary Creature — Human Artificer card from The Brothers' War Promos (PBRO), collector number 226p. Current market price: $0.62 (foil $0.54), TCGplayer market prices via Scryfall.
Artifact creatures you control get +2/+2. {6}: Create a token that's a copy of target artifact you control, except it's a 1/1 Soldier creature in addition to its other types.