Aetherflux Reservoir [Kaladesh Prerelease Promos]Set: 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.

If you lose the flip

• Counter target blue spell

Set: Black & White: Legendary Treasures Type: Lightning Rarity: Secret Rare Retreat cost: Colorless

you may return target creature to its owner's hand

{T}: Add {G} or {U}

Set: Sword & Shield: Base Set Type: Item Rarity: Promo

destroy all non-Wall creatures that player controls that didn't attack this turn

Set: Sun & Moon: Crimson Invasion Type: Dragon Rarity: Promo Retreat cost: 1

Set: Welcome to Rathe Unlimited Edition: Unlimited Finish: Rainbow Foil Type: Resource Subtype: Gem Rarity: Fabled Class: Generic Legendary (You may only have 1 Heart of Fyendal in your deck

Set: Sun & Moon: Lost Thunder Type: Fairy Rarity: Ultra Rare Retreat cost: Colorless

your next attack this turn gains +1 [Power]

Set: EX: Team Rocket Returns Type: Darkness Rarity: Holo Rare Retreat cost: Colorless