The classic untap all my stuff combo is Dramatic Reversal and Isochron Scepter, but Aphetto Alchemist + Illusionist's Bracers will also tap and untap an artifact infinitely
Those are pricey, but the shadowless versions are the most expensive
However, there is a common complaint about the quality of certain CMR foils, specifically the standard foiling on regular and extended art cards
Marvel's Spider-Man Collector Booster Box Your friendly neighborhood Spider-Man swings into Magic: The Gathering, and not a moment too soon
It doesnt have many applications outside of EDH unless you wanted to get really spicy with Sorin, Imperious Bloodlord in Timeless, but in EDH it chews away at your opponents resources with a few clones
Its a big, evasive demon, it gives you a strong reason to have demons around, and it replaces itself, among other things