Mephitic Vapors

Black has always owned the -X/-X sweep: Infest, Mutilate, Languish, and Toxic Deluge all scale toughness reduction into a proper wrath, killing through indestructible and regeneration because they never deal damage. What separates this one is not the size of the sweep but what rides alongside it. A single point of reduction is the smallest meaningful cut in that family, a curve-check against one-toughness aggressive starts and token swarms rather than a reset against a developed board. Anything with two toughness walks away intact and keeps swinging. As a sorcery, the shrink also has to resolve on your own turn, before blocks; it cannot be held back as a combat ambush the way an instant-speed version could, which narrows the window where a one-point cut earns its mana. The surveil 2 is what the design trades that ceiling for. Bolting card selection and graveyard-filling onto a sweeper turns a marginal board effect into a card that stays live long after the -1/-1 stops mattering, feeding delve, recursion, and self-mill payoffs while smoothing the next two draws. That is the niche it occupies: not the answer you reach for to stabilize under pressure, but the one a grindy black deck runs because the second half keeps it relevant when the first half does not.