Whir of Invention is a rare Instant card from Magic: The Gathering (Aether Revolt Promos, PAER).
Rare
Aether Revolt Promos (PAER)
{X}{U}{U}{U}
Mana Value
3
Colors
U
Card Text
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.
