Mox Opal [Kaladesh Inventions] Avacyn Restored Set: Commander 2016 Type: Instant

Set: Commander 2016 Type: Instant Rarity: Uncommon Cost: {U} Return target nonland permanent to its owner's hand

Set: Commander 2017 Type: Artifact — Equipment Rarity: Rare Cost: {1} Whenever a creature dies

Set: Limited Edition Alpha Type: Creature — Zombie Rarity: Uncommon Cost: {3}{B} At the beginning of each end step

Then if you have seven or more cards in your graveyard

Set: Magic 2015 Type: Legendary Artifact Rarity: Mythic Cost: {4} At the beginning of your end step

Mox Opal [Kaladesh Inventions] Avacyn Restored Set: Commander 2016 Type: InstantSet: Kaladesh Inventions Type: Legendary Artifact Rarity: Mythic Cost: {0} Metalcraft {T}: Add one mana of any color. Activate this ability only if you control three or more artifacts. On loan from a private collection, this unique mechanism extracts power from a carefully prepared gemstone.