Tawnos, the Toymaker is a rare Legendary Creature — Human Artificer card from The Brothers' War (BRO), collector number 359. Current market price: $0.51 (foil $0.79), TCGplayer market prices via Scryfall.
Whenever you cast a Beast or Bird creature spell, you may copy it, except the copy is an artifact in addition to its other types. (The copy becomes a token.)