Whir of Invention
Instant
Promo, NearMint, 
#49 in Aether Revolt: Promos
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.
€7.99
Watchdog
Out of stock
| Language | English |
|---|---|
| supertype | (not set) |
| type | Instant |
| subtype | (not set) |
| color | U |
| style | Promo |
| number | 49 |
| rarity | Rare |
| manacost | X U U U |
| condition | NearMint |
| power | |
| toughness | |
| artist | Christine Choi |
| layout | Regular |
| loyalty | (not set) |