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The Mightstone and Weakstone
ReprintLegendary Artifact — Powerstone
When The Mightstone and Weakstone enters, choose one — • Draw two cards. • Target creature gets -5/-5 until end of turn. : Add . This mana can't be spent to cast nonartifact spells. (Melds with Urza, Lord Protector.)
rare · #238s · pbro