Armor Class 10
Hit Points 17 (5d6)
Speed 30 ft., fly 30 ft.
Skills Stealth +2
Damage Immunities fire, poison
Condition Immunities exhaustion, poisoned
Senses Darkvision 60 ft., passive Perception 10
Languages Primordial (Aquan, Ignan)
Challenge 1/4
Blurred Form. Attack rolls against the mephit are made with Disadvantage unless the mephit has the Incapacitated condition.
Death Burst. The mephit explodes when it dies. dex DC 10, each creature in a 5-foot Emanation originating from the mephit. 5 (2d4) Fire damage. Half damage.
Claw. m +2, reach 5 ft. Hit: 2 (1d4) Slashing damage plus 2 (1d4) Fire damage.
Steam Breath (Recharge 5–6). con DC 10, each creature in a 15-foot Cone. 5 (2d4) Fire damage, and the target's Speed decreases by 10 feet until the end of the mephit's next turn. Half damage only. Being underwater doesn't grant Resistance to this Fire damage.
Monster Manual (2024), p. 208