The Mightstone and Weakstone

When The Mightstone and Weakstone enters the battlefield, choose one — • Draw two cards • Target creature gets -5/-5 until end of turn. T: Add CC. This mana can't be spent to cast nonartifact spells. (Melds with Urza, Lord Protector.) ------------- Meld Partner: Urza, Lord Protector When Melded, it becomes the following: Uza, Planeswalker Legendary Planeswalker — Urza You may activate the loyalty abilities of Urza, Planeswalker twice each turn rather than only once. [+2]: Artifact, instant, and sorcery spells you cast this turn cost 2 less to cast. You gain 2 life. [+1]: Draw two cards, then discard a card. [0]: Create two 1/1 colorless Soldier artifact creature tokens. [-3]: Exile target nonland permanent. [-10]: Artifacts and planeswalkers you control gain indestructible until end of turn. Destroy all nonland permanents.