Saheeli's Directive

Saheeli's Directive

Sorcery (CMC 3)
Improvise (Each artifact you tap after you're done activating mana abilities pays for .)
Reveal the top X cards of your library. You may put any number of artifact cards with mana value X or less from among them onto the battlefield. Then put all cards revealed this way that weren't put onto the battlefield into your graveyard.