Pipes of Haunting
A long set of carved bone pipes pressed into Gryph's palm by the Gestalt as part of the bargain that returned his song to him. The bargain cost him the memory of why he came to the Wildermarch in the first place; the pipes were the sweetener.
Properties (requires attunement): You can use an action to play a haunting tune on the pipes. Each creature within 30 feet that hears you must succeed on a Wisdom saving throw or become frightened of you for 1 minute. A creature that fails by 5 or more is also incapacitated while frightened in this way. A creature that succeeds is immune to the pipes for the next 24 hours. The pipes hold 3 charges and recover all expended charges daily at dawn.
The bone is old and slightly warm to the touch. Gryph has not yet asked whose it was.