Whir of Invention is a rare Instant card from Magic: The Gathering (The List, PLST). Current market price: $6.22.
Rare
The List (PLST)
{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.
