The Mightstone and Weakstone - Foil - Prerelease Promo

Extra Info

• Color: Artifact
• Card Text: When The Mightstone and Weakstone enters the battlefield, choose one -
  • Draw two cards.
  • Target creature gets -5/-5 until end of turn.
  {T}: Add {C}{C}. This mana can't be spent to cast nonartifact spells.
  (Melds with Urza, Lord Protector.)
• Rarity: P
• Cost: 5
• Card Type: Legendary Artifact - Powerstone
• Artist: Ryan Pancoast
• Name: The Mightstone and Weakstone
• Finish: Foil
• Card Number: 238/287
• Set Name: The Brothers' War