![Whir of Invention [Aether Revolt Promos]](http://rayscollectibles.myshopify.com/cdn/shop/products/73622e2f-5f3a-4ab2-a87b-de45f179bc5b_{width}x.jpg?v=1612485968)
![Whir of Invention [Aether Revolt Promos]](http://rayscollectibles.myshopify.com/cdn/shop/products/73622e2f-5f3a-4ab2-a87b-de45f179bc5b_530x@2x.jpg?v=1612485968)
| Set: | Aether Revolt Promos |
| Type: | Instant |
| 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.