Whir of Invention
0279fd3c-9252-4958-9d7a-5f33aa25907e
$1.00 CND
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.