Mox Opal (Foil) (SOM) from Scars of Mirrodin, available at 401 Games Canada.

• Rarity: Mythic Rare
• Finish: Foil
• Artist: Volkan Baǵa
• Card Text:
  Metalcraft — T: Add one mana of any color to your mana pool. Activate this ability only if you control three or more artifacts.