Bubble Mephit

Death Burst. When the mephit dies, it pops in a spread of corrosive liquid. Each creature within 5 feet of the mephit must succeed on a DC 10 Dexterity saving throw or take 4 (1d8) acid damage.

False Appearance. While the mephit remains motionless, it is indistinguishable from an ordinary group of bubbles.

Innate Spellcasting (1/Day). The mephit can innately cast misty step, requiring no material components. Its innate spellcasting ability is Charisma.

Claws. Melee Weapon Attack: +3 to hit, reach 5 ft., one creature. Hit: 3 (1d4 + 1) slashing damage plus 2 (1d4) bludgeoning damage.

Bubble Spit (Recharge 6). The mephit exhales a 15 - foot cone of pressurized bubbles. Each creature in that area must succeed on a DC 11 Dexterity saving throw, taking 7 (2d6) bludgeoning damage on a failed save, or half as much damage on a successful one.