Whir of Invention [Aether Revolt Prerelease Promos] Magic 2013 Comet Storm deals X damage

Comet Storm deals X damage to each of them

then put two cards from your hand on top of your library in any order

) Equip {4} ({4}: Attach to target creature you control

If you would begin your turn while Time Vault is tapped

Whir of Invention [Aether Revolt Prerelease Promos] Magic 2013 Comet Storm deals X damageSet: Aether Revolt Prerelease 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.