Defense Grid (Retro Schematic) (Serialized) [The Brothers' War Retro Artifacts] SM49 Return it to the battlefield

Return it to the battlefield under its owner's control at the beginning of the end step

Then you may sacrifice a creature

Set: Sun & Moon: Guardians Rising Type: Psychic Rarity: Promo Retreat cost: Colorless

Deep within the Cabal's vault

Set: Base Set Shadowless Unlimited Type: Lightning Rarity: Rare Retreat cost: Colorless

Defense Grid (Retro Schematic) (Serialized) [The Brothers' War Retro Artifacts] SM49 Return it to the battlefieldSet: 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*