Mox Opal [Kaladesh Inventions]Set: 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.

Choose a color

that player sacrifices it

Activate only if you control six or more artifacts

In its shadow

−3: Return target creature card from your graveyard to the battlefield

choose target artifact card in your graveyard

Sacrifice this artifact: Add one mana of any color

(Piles can be empty

the Orcs invented an incredibly destructive weapon

change Halfdane's base power and toughness to the power and toughness of target creature other than Halfdane until the end of your next upkeep

insatiate to pursue vain war with heav'n

Riptide survivor