Boil Water

You can cause up to 10 gallons of water to boil within range. This can be in the form of a 5ft cube of water in an open container within range, or a 30ft cube of rain within range.

The affected area becomes fog and is heavily obscured. Any creature that starts their turn in the fog or enters it on a turn must make a CON save, taking 2d6 fire damage on a failed save or half as much on a successful one. The fog dissipates after 1 round.

The fire damage increases by 1d6 for every level above 1st.