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![Whir of Invention (49) [Prerelease Cards]](http://shopmancalamonk.com/cdn/shop/files/126869_in_1000x1000_f3a9898e-5022-4423-8d3f-dacd5bffff50.jpg?v=1785618205&width=3840)
Whir of Invention (49) [Prerelease Cards]
$29.30
Prerelease Cards
Instant
rare
{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.