Plague Nurse

Toxic was designed to be additive: a keyword that stacks a poison count on top of ordinary combat damage, handed out cheaply in small increments so that a board of toxic creatures kills over several turns rather than in one swing. This is the piece that compresses that math. The activated ability bumps every other toxic creature you control up by one for a turn, so a wide board built on toxic 1 bodies suddenly delivers toxic 2 across the whole team in a single attack step. That is where the design tension lives: poison as a wincon wants breadth, a swarm of small clock-setters, but breadth alone is slow. This card converts breadth into burst, letting an army that had been ticking down over several turns land a lethal spread of counters in one combat instead. The once-per-turn clause is the restriction that keeps it from spiraling: you get one anthem's worth of extra toxic per turn cycle, not a stacking loop, so the effect rewards how many bodies you have already committed rather than how many activations you can chain. As a 3/4 with toxic 2 in its own right, it also holds the ground while the plan builds, which matters for a strategy whose creatures are individually small and whose clock is measured in poison rather than life. A support piece for a keyword that lives or dies on its aggregate, and one of the few cards that lets that aggregate spike.