Locust Spray

A shrink spell does two jobs at once: it outright kills anything with one toughness, and it wrecks a bigger creature's combat math for a turn, all at instant speed for the smallest possible outlay. What keeps a card like this from rotting in hand against a board of fat creatures is the second line, and here it is cycling for the same single black mana, so the floor is never worse than a card you did not want to draw. That symmetry is the quiet cleverness of the design: one swamp to cast, one swamp to cycle away, so you are never punished for holding it and never overpaying to bail. The -1/-1 effect itself is unfashionable next to hard removal, but it fills a precise gap: cheap, instant-speed answers to the mana dorks, tokens, and X/1 utility creatures that heavier removal is too expensive to spend on. In the lineage of black's small combat modifiers, this sits in the most flexible corner: a real interactive spell early, a smooth cantrip late, and never a card you regret opening your hand to find.