Smog

You release a toxic cloud of poisonous smog in a 10 foot radius, centered on a point within range. Any creature that starts their turn in this area must succeed on a CON save against your Move DC, taking 1d6 + MOVE poison damage on a failure, or half as much on a success. Creatures that fail this save by 5 or more become poisoned.

At Higher Levels: The damage dice roll for this move changes to 2d4 at level 5, 1d12 at level 10, and 4d4 at level 17.