Memnarch is a rare Legendary Artifact Creature — Wizard card from Archenemy (ARC), collector number 112. Current market price: $5.47, TCGplayer market prices via Scryfall.
{1}{U}{U}: Target permanent becomes an artifact in addition to its other types. (This effect lasts indefinitely.) {3}{U}: Gain control of target artifact. (This effect lasts indefinitely.)