Steam Mephit

The mephit exhales a 15- foot cone of scalding steam. Each creature in that area must succeed on a DC 10 Dexterity saving throw, taking 4 (1d8) fire damage on a failed save, or half as much damage on a successful one.

Constitution Saving Throw: DC 10, each creature in a 15-foot Cone. Failure: 5 (2d4) Fire damage, and the target’s Speed decreases by 10 feet until the end of the mephit’s next turn. Success: Half damage only. Failure or Success: Being underwater doesn’t grant Resistance to this Fire damage.

When the mephit dies, it explodes in a cloud of steam. Each creature within 5 feet of the mephit must succeed on a DC 10 Dexterity saving throw or take 4 (1d8) fire damage.

The mephit explodes when it dies. Dexterity Saving Throw: DC 10, each creature in a 5-foot Emanation originating from the mephit. Failure: 5 (2d4) Fire damage. Success: Half damage.