Scimitar

Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 7 (1d6 + 4) slashing damage.

Shriek (Recharge 5-6)

The chernomoi emits a loud shriek that is audible out to 100 feet. Each creature within 60 feet of the chernomoi and that can hear it must make a DC 13 Constitution saving throw, taking 10 (3d6) thunder damage on a failed save, or half as much damage on a successful one.

Spellcasting

The chernomoi casts one of the following spells, requiring no material components and using Charisma as the spellcasting ability (spell save DC 13): At will: detect magic, mage hand, mending, message, prestidigitation 1/day each: detect poison and disease, dimension door