Toymaker is a uncommon Artifact Creature — Spellshaper card from The List (PLST), collector number MMQ-314. Current market price: $0.29, TCGplayer market prices via Scryfall.
{1}, {T}, Discard a card: Target noncreature artifact becomes an artifact creature with power and toughness each equal to its mana value until end of turn. (It retains its abilities.)