Defense Grid (Retro Schematic) (Serialized) [The Brothers' War Retro Artifacts] Snake if the amount of mana

if the amount of mana spent to cast that spell is greater than Liberator

Go to Minas Tirith and save my people

When Skitterbeam Battalion enters the battlefield

{7}: If you both own and control Urza

Any number of target nonland permanents you control phase out

Defense Grid (Retro Schematic) (Serialized) [The Brothers' War Retro Artifacts] Snake if the amount of manaSet: The Brothers' War Retro Artifacts Type: Artifact Rarity: Rare Cost: {2} Each spell costs {3} more to cast except during its controller's turn. "Properly installed, each powerstone emits a targeted electromagnetic field that halts momentum as sure as stone." *Tome of Obstructions*