Whir of Invention - The List - AER-49

Instant

Mana Cost: {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.

Rare · The List · #AER-49 (PLST)

Illustrated by Christine Choi