Toxrill, the Corrosive + Maha, Its Feathers Night

Prerequisites

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Steps

1. 1At the beginning of your end step, Toxrill's first ability triggers, putting a slime counter on each creature your opponents control.
2. 2Because your opponents' creatures are now 0/0 due to Maha and Toxrill's static effects, the creatures die as a state-based action due to having zero toughness unless there is an effect boosting their toughness.
3. 3Repeat during each of your end steps.

Effects

• Reduce the toughness of creatures opponents control to 0 on each of your turns