Mox Opal [Kaladesh Inventions] Set_Urza's Destiny The imps' warbling cries echo

The imps' warbling cries echo through Phyrexia's towers like those of mourning doves in a cathedral

Set: Kaladesh Prerelease Promos Type: Legendary Creature — Vedalken Artificer Rarity: Rare Cost: {3}{U} Artifacts you control have hexproof

that player plays with that card revealed in their hand and can't play it

"I fear that as we scurry after phantoms

where X is the number of Zombies you control

Mox Opal [Kaladesh Inventions] Set_Urza's Destiny The imps' warbling cries echoSet: Kaladesh Inventions Type: Legendary Artifact Rarity: Mythic Cost: {0} Metalcraft {T}: Add one mana of any color. Activate only if you control three or more artifacts. On loan from a private collection, this unique mechanism extracts power from a carefully prepared gemstone.