Whir of Invention 49 (Aether Revolt)

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.

NM - $9.10
LP - $7.30
MP - $5.50
HP - $3.70
DMG - $1.90