Mox Opal [Kaladesh Inventions] Avacyn Restored If the player doesn't discard

If the player doesn't discard a card this way

it even turned a couple of somersaults

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

then target opponent destroys four lands they control

The intensity of their glare was soon surpassed by the intensity of their attack

Mox Opal [Kaladesh Inventions] Avacyn Restored If the player doesn't discardSet: 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.