Death Burst. 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) Bludgeoning damage. Success: Half damage.
Blinding Breath (Recharge 6). Dexterity Saving Throw: DC 10, each creature in a 15-foot Cone. Failure: The target has the Blinded condition until the end of the mephit's next turn.
Sleep (1/Day). The mephit casts the Sleep spell, requiring no spell components and using Charisma as the spellcasting ability (spell save DC 10).
RollQuest ships the D&D 2024 SRD as a content pack, on a 5e character sheet that does the maths - roll from the sheet and let the numbers work themselves out. Free to start.