Whir of Invention [Aether Revolt Prerelease Promos] Incarnation Set: Saviors of Kamigawa Type:

Set: Saviors of Kamigawa Type: Sorcery Rarity: Rare Cost: {2}{B} Each player may bid life

"You can build a perfect machine out of imperfect parts

like a witch's oils

"Do not linger in such places

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

Whir of Invention [Aether Revolt Prerelease Promos] Incarnation Set: Saviors of Kamigawa Type:Set: 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.