The Mightstone and Weakstone [The Brothers' War Prerelease Promos] Skyridge your players will face an

your players will face an adventure like never before

+1: Up to one target land you control becomes a 3/3 Elemental creature with vigilance

It has "Sacrifice this creature: Add C

Set: Celebrations: 25th Anniversary - Classic Collection Type: Darkness Rarity: Ultra Rare Retreat cost: Colorless

) You can discard this card and 1 EARTH monster

The Mightstone and Weakstone [The Brothers' War Prerelease Promos] Skyridge your players will face anSet: 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.)