Mountain Brush Key

Description
a brass key with a large emerald in the handle. The teeth of the key stick out in all directions, like a pipe cleaner.

The Key goes to a now locked treasury room in The City under the Mountain

Magic mouth has been cast of the key,

When the key is brought into the cities castle, The Key says "We Fallen. Pray you safe Lutgrabela, Flee to great circle, pray not follow you. Will contain them. Caveroun will protect. Grandchildren reclaim city, "otvoren" password" over 5 minutes