Iron Claws

Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 14 (2d8 + 5) slashing damage and if the creature is wearing metal armor, it must make a successful DC 15 Constitution saving throw or be deafened until the end of its next turn.

Everywhere at Once (Recharge 5-6)

The echo demon teleports up to 60 feet to an unoccupied space. Immediately after teleporting, it can make an iron claws attack with advantage as a bonus action.

Echoes of the Abyss (1/Day)

The echo demon summons horrible wails from the deep crevasses of the Abyss. Creatures within 60 feet who can hear the wails must succeed on a DC 15 Wisdom saving throw or be stunned until the start of the echo demon's next turn. An affected creature continues hearing the troubling echoes of these cries until it finishes a long rest, and it has disadvantage on Intelligence checks until then.