Name: The Mightstone and Weakstone Cost: 5 CMC: 5 Color: CID: Type: Legendary Artifact -- Powerstone Rules Text: When The Mightstone and Weakstone enters, 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.) [Melds with Urza, Lord Protector into Urza, Planeswalker.] Set/Rarity: The Brothers' War rare, The Brothers' War Promos rare Set Code: BRO-R, PBRO-R Legality: Legal in duel, Legal in vintage, Legal in commander, Legal in oathbreaker, Legal in penny, Legal in brawl, Legal in competitivebrawl, Legal in gladiator, Legal in pioneer, Legal in historic, Legal in timeless, Legal in modern, Legal in legacy Price: $4.17 Foil price: $5.55