Aetherflux Reservoir [Kaladesh Prerelease Promos] Modern Masters return it to the battlefield

return it to the battlefield under its owner's control with a -1/-1 counter on it

sacrifice Phantasmal Forces unless you pay {U}

As Breeding Pool enters the battlefield

it has the power to realize epic visions

Aetherflux Reservoir [Kaladesh Prerelease Promos] Modern Masters return it to the battlefieldSet: Kaladesh Prerelease Promos Type: Artifact Rarity: Rare 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.