Paradox Engine
Legendary Artifact (CMC 5)
Whenever you cast a spell, untap all nonland permanents you control.
Decks with Paradox Engine
[AER] Aether Revolt #169 (M)
[PAER] Aether Revolt Promos #169s (M)
[KLR] Kaladesh Remastered #259 (M)
[MPS] Masterpiece Series: Kaladesh Inventions #43 (M)