Steam mephit

Steam mephit: Chaotic and destructive, mephits come in many shapes and have a wide range of abilities. Most are drawn from the various elemental and quasi-elemental planes.

Special abilities
A steam mephit has 5/+1 damage reduction and 100% immunity to fire damage, but also has 50% vulnerability to cold damage. This creature regenerates 2 hit points per round.

This creature can use its steam mephit breath once per day.