Aetherflux Reservoir (Retro) [The Brothers' War Retro Artifacts] Artificer Ward—Sacrifice a permanent with mana

Ward—Sacrifice a permanent with mana value 1 or greater

and Phyrexia: All Will be One are Argentum expansions

(Whenever an artifact you control becomes the target of a spell or ability an opponent controls

if that creature has greater power or toughness than this creature

protection from Phyrexians

Aetherflux Reservoir (Retro) [The Brothers' War Retro Artifacts] Artificer Ward—Sacrifice a permanent with manaSet: 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. While most power is used for ordinary, everyday tasks, one shouldn't underestimate its potential for the extraordinary.