Conadaes's Power to the pebble

You implant a musical tune into a rock and set a trigger word or gesture. when the trigger conditions are met the stone will start to to play up to 10 minutes of audio. the recording must take the form of some kind of melody or poem (instrumental may acompany).

The triggering circumstance can be as general or as detailed as you like, though it must be based on visual or audible conditions that occur within 30 feet of the object. For example, you could instruct the stone to sing when any creature moves within 30 feet of the object or when a silver bell rings within 30 feet of it.