Oltec Matterweaver is a mythic Creature — Human Artificer card from The Big Score (BIG), collector number 3. Current market price: $2.29 (foil $2.55), TCGplayer market prices via Scryfall.
Whenever you cast a creature spell, choose one — • Create a 1/1 colorless Gnome artifact creature token. • Create a token that's a copy of target artifact token you control.