The Mightstone and Weakstone [The Brothers' War Prerelease Promos] L+20 You may cast colorless spells

You may cast colorless spells and artifact spells as though they had flash

Rebound (If you cast this spell from your hand

Set: Modern Masters Type: Artifact — Equipment Rarity: Mythic Cost: {3} Equipped creature gets +2/+2 and has protection from white and from black

Set: Beta Edition Type: Creature — Troll Rarity: Rare Cost: {2}{R} Sedge Troll gets +1/+1 as long as you control a Swamp

The Mightstone and Weakstone [The Brothers' War Prerelease Promos] L+20 You may cast colorless spellsSet: 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.)