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.

Enchanted creature can't be blocked except by Walls

You lose 2 life

Set: Alpha Edition Type: Instant Rarity: Common Cost: {X}{W} Prevent the next X damage that would be dealt to any target this turn

Whenever enchanted creature deals damage to a player

Set: Hour of Devastation Type: Enchantment Rarity: Rare Cost: {2}{W} Players can't get counters

Set: Eighth Edition Type: Land Rarity: Rare Whenever City of Brass becomes tapped

Set: League Tokens 2014 Type: Token Enchantment Creature — Soldier Rarity: Common

Set: Ninth Edition Type: Sorcery Rarity: Rare Cost: {6}{G}{G} Each player's life total becomes the number of creatures they control

Indestructible

If you sacrifice an Island this way

−6: Untap up to two target lands you control

Set: Beta Edition Type: Land — Forest Plains Rarity: Rare ({T}: Add {G} or {W}