Terisiare's Devastation

The X in the cost bills you twice: once in mana, once in life, and the second payment is the one that buys the ammunition. Every point of X becomes a tapped Powerstone, and those Powerstones feed directly into the sweep, because each artifact you control deepens the -1/-1 that washes over the board. So the tokens arrive already counted toward the wrath they enable: the ramp and the clear collapse into one act. That means the spell can seed its own sweep. Fire it with a high X into an empty artifact board and the Powerstones alone push the -1/-1 far enough to erase most of a battlefield; layer it on top of a dedicated artifact shell and the number climbs past anything modest boards survive, leaving you a fistful of colorless mana to rebuild first, though that mana is walled off from nonartifact spells. The floor is low only if you commit little to X, since a small payment leaves both a shallow sweep and a shallow board. The life you pay is the honest cost of a wrath whose ceiling you set on the spot and whose reach scales with an artifact count you can pad the moment you cast it. This is a board wipe for a deck that treats artifacts as a resource to be tallied rather than merely cast, and it rewards knowing exactly how many you hold, and how many you are about to make, before you tap out.