Oltec Matterweaver is a mythic Creature — Human Artificer card from The Big Score (BIG), collector number 33. Current market price: $5.66 (foil $7.86), 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.