The Blackstaff of Waterdeep FOIL pr-p (RU)

You may choose not to untap The Blackstaff of Waterdeep during your untap step.
Animate Walking Statue — 1U, T: Another target nontoken artifact you control becomes a 4/4 artifact creature for as long as The Blackstaff of Waterdeep remains tapped. Activate only as a sorcery.