Dregs of Sorrow
A scalable removal-plus-refuel spell that prices its two halves against each other: every creature it destroys is a card it draws back, so the X scales board control and card flow in perfect lockstep. The card never overcommits, because the X rides on top of a five-mana floor before you buy a single point of it. That floor is the design discipline keeping it honest. At its smallest it does almost nothing; it wants several targets to break apart and a turn late enough to afford a meaningful X, and it pays you for waiting with parity-breaking card advantage at the exact moment the board is most cluttered. The nonblack clause is the other constraint doing real work, and it is a restriction rather than a perk: it narrows the set of enemy threats the spell can answer, leaves black creatures across the table beyond its reach, and goes completely dead against an opponent whose board is all black. Where a flat board wipe asks nothing of your hand and gives nothing back, this is the targeted, patient build's answer: a sorcery-speed dismantling of a developed board that refuels the caster instead of stranding them empty once the dust settles. It is not a reset button so much as a trade you set the size of, paid in mana for both the bodies you remove and the hand you rebuild.
