Saheeli's Directive
Sorcery
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.
Legal in
Legacy, Vintage, Commander
Rulings (11)
Improvise can't pay for , , , , , or mana symbols in a spell's total cost.
2018-07-13
When using improvise to cast a spell with in its mana cost, first choose the value for X. That choice, plus any cost increases or decreases, will determine the spell's total cost. Then you can tap artifacts you control to help pay that cost. For example, if you cast Saheeli's Directive and choose X to be 3, the total cost is . If you tap two artifacts, you'll have to pay .
2018-07-13
If an artifact you control has a mana ability with in the cost, activating that ability while casting a spell with improvise will result in the artifact being tapped when you pay the spell's costs. You won't be able to tap it again for improvise. Similarly, if you sacrifice an artifact to activate a mana ability while casting a spell with improvise, that artifact won't be on the battlefield when you pay the spell's costs, so you won't be able to tap it for improvise.
2018-07-13
Saheeli's Directive considers the individual mana values of the artifact cards you reveal. The sum of their mana values may be greater than X.
2018-07-13