Neurok Transmuter is a uncommon Creature — Human Wizard card from Darksteel (DST), collector number 27. Current market price: $0.20 (foil $1.88), TCGplayer market prices via Scryfall.
{U}: Target creature becomes an artifact in addition to its other types until end of turn. {U}: Until end of turn, target artifact creature becomes blue and isn't an artifact.