Mesmeric Orb (Retro Schematic) (Serialized) [The Brothers' War Retro Artifacts] XY189 Whenever the final chapter ability

Whenever the final chapter ability of a Saga you control resolves

1 Heirloom Blade

each other creature gets -1/-1 until end of turn

Add 1 card with [Greymon] or [Omnimon] in its name and 1 [X Antibody] among them to your hand

They may play it this turn

Mesmeric Orb (Retro Schematic) (Serialized) [The Brothers' War Retro Artifacts] XY189 Whenever the final chapter abilitySet: The Brothers' War Retro Artifacts Type: Artifact Rarity: Mythic Cost: {2} Whenever a permanent becomes untapped, that permanent's controller mills a card. "I now believe the strange orb was some kind of Thran security device. Supporting this hteory, I can no longer recall where I found it." Tocasia, journal entry