Whir of Invention [Aether Revolt Promos]

Whir of Invention [Aether Revolt Promos]Set: Aether Revolt Promos Type: Instant Rarity: Rare Cost: {X}{U}{U}{U} Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for {1}.) Search your library for an artifact card with mana value X or less, put it onto the battlefield, then shuffle.

Set: Exodus Type: Creature — Zombie Rarity: Rare Cost: {1}{B} {X}{X}{B}: Destroy target nonblack creature with mana value X

Set: XY: Generations Type: Lightning Rarity: Ultra Rare Retreat cost: Colorless

Set: Neo Revelation Unlimited Type: Metal Rarity: Holo Rare Retreat cost: Colorless

Whenever a Mountain enters the battlefield under your control

"I don't have time for you right now

Not all Keld's warriors are found on the battlefield

Set: Lorwyn Type: Creature — Goblin Shaman Rarity: Common Cost: {2}{B} When Spiderwig Boggart enters the battlefield

Though adept at both magic and swordplay

When Hellkite Courser enters the battlefield

this scheme deals 6 damage to that player

0: If you have at least 15 life more than your starting life total

Lord High Artificer enters the battlefield