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 Legality: Legal in oathbreaker, Legal in commander, Legal in legacy, Legal in brawl, Legal in pioneer, Legal in vintage, Legal in modern, Legal in historic, Legal in duel, Legal in timeless, Legal in gladiator, Legal in penny Price: $3.35 Foil price: $4.23