Whir of Invention [Aether Revolt Prerelease Promos] Incarnation Set: Vanguard Series Type: Vanguard

Set: Vanguard Series Type: Vanguard Rarity: Rare Creatures you control have vigilance

"You can build a perfect machine out of imperfect parts

Mines became common as cities during the days of the artificers

then put all cards exiled with Knowledge Vault into their owner's hand

Whir of Invention [Aether Revolt Prerelease Promos] Incarnation Set: Vanguard Series Type: VanguardSet: 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.