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.)
The Mightstone and Weakstone (BRO-238) - The Brothers' War
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.)
: Add 
