The Mightstone and Weakstone [The Brothers' War Prerelease Promos] 078 Set: March of the Machine

Set: March of the Machine Type: Legendary Planeswalker — Wrenn Rarity: Mythic Cost: {1}{G}{G} Lands you control have “{T}: Add one mana of any color

attach it to target legendary creature you control

Set: World Championships 2018 Type: Lightning Rarity: Ultra Rare Retreat cost: Colorless

It becomes an Angel in addition to its other types and gains flying

The Mightstone and Weakstone [The Brothers' War Prerelease Promos] 078 Set: March of the MachineSet: 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.)