Multiattack

The black crier uses its Bell Toll. It then makes two melee attacks.

Bell

Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 7 (1d8 + 4) bludgeoning damage plus 14 (4d6) necrotic damage.

Bell Toll

The black crier targets one creature it can see within 60 feet of it. The creature must make a DC 17 Wisdom saving throw. On a failure, the target takes 14 (4d6) necrotic damage and is frightened until the end of its next turn. On a success, the target takes half the damage and isn't frightened. If the saving throw fails by 5 or more, the target suffers one level of exhaustion.

Crier's Lament (1/Day)

The black crier unleashes a devastating peal of anguish and rage in a 30-foot cone. Each creature in the area must make a DC 16 Charisma saving throw. On a failure, a creature drops to 0 hp. On a success, a creature takes 21 (6d6) psychic damage and is frightened for 1 minute. A frightened creature can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.