Memnarch 
Legendary Artifact Creature — Wizard
: Target permanent becomes an artifact in addition to its other types. (This effect lasts indefinitely.)
: Gain control of target artifact. (This effect lasts indefinitely.)
Legality
standardNOT LEGALpioneerNOT LEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL