Whir of Invention (Special Guests)

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 - $14.00
LP - $11.00
MP - $8.50
HP - $5.50
DMG - $3.00