Aetherflux Reservoir [Kaladesh] Cat Warrior Creatures with swampwalk can be

Creatures with swampwalk can be blocked as though they didn't have swampwalk

it deals double that damage to that permanent or player instead

Set: Alpha Edition Type: Instant Rarity: Common Cost: {U} You may tap or untap target artifact

flip Erayo

When Spellstutter Sprite enters the battlefield

Aetherflux Reservoir [Kaladesh] Cat Warrior Creatures with swampwalk can beSet: Kaladesh 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.