Whir of Invention

AER · RARE · #49/184

Instant

{X}{U}{U}{U} · MV 3

Buy 0.005 / Sell 0.03 tix

Improvise @i(Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for {1}.)@inSearch your library for an artifact card with mana value X or less, put it onto the battlefield, then shuffle.