Aetherflux Reservoir (Retro Schematic) (Serialized) [The Brothers' War Retro Artifacts] Halfling Citizen where X is the greatest

where X is the greatest power among creatures you control

Set: Secret Lair Drop Series Type: Sorcery Rarity: Rare Cost: {2}{U} Search your library for an artifact card

If you search your library this way

For each of those cards

This mana can't be spent to pay generic mana costs

Aetherflux Reservoir (Retro Schematic) (Serialized) [The Brothers' War Retro Artifacts] Halfling Citizen where X is the greatestSet: The Brothers' War Retro Artifacts Type: Artifact Rarity: Mythic Cost: {4} Whenever you cast a spell, you gain 1 life for each spell you've cast this turn. Pay 50 life: Aetherflux Reservoir deals 50 damage to any target. "These estimates are conservative. Its true capacity may be far, far greater." Research notes, signature illegible