![Whir of Invention [Aether Revolt Promos]](https://cdn.shopify.com/s/files/1/0514/8131/3429/products/73622e2f-5f3a-4ab2-a87b-de45f179bc5b.jpg?v=1612485968)
Whir of Invention [Aether Revolt Promos]
$7.10
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Set: Aether Revolt Promos Type: Instant 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 converted mana cost X or less, put it onto the battlefield, then shuffle your library.
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