The Mightstone and Weakstone [The Brothers' War Prerelease Promos] Wraith Noble and has "Whenever a player

and has "Whenever a player casts a spell or a creature attacks

The glorious light of *compleation* is nigh

(Each {G} in the mana costs of permanents you control counts toward your devotion to green

exile up to one target non-Aura enchantment card from your graveyard

"A wish can be controlled

The Mightstone and Weakstone [The Brothers' War Prerelease Promos] Wraith Noble and has "Whenever a playerSet: The Brothers' War Prerelease Promos Type: Legendary Artifact Powerstone Rarity: Rare Cost: {5} When The Mightstone and Weakstone enters the battlefield, 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.)