You could use music in variety of ways ranging from giving the enemies the noise of their lifetime, auditory hallucinations, to ultimately madding eldritch horror ravings that could make anyone go mad (if he ever decides to practice dark magic that is)
So considering the fact that he did cultivate his skills to the point of 'returning to origin' with the Dao, I guess that concludes that he's already an Immortal
Only after comprehending the Dao would one's realm be raised!
Eastern · Little Brother Langya
Lord of the Storms from a well known book
"I can't control the weather," I mouthed in her direction, though it was a pretty blatant lie. I could, just not well enough to guarantee that the thunderstorm wouldn't hit and destroy everything on its path. I hadn't really practiced the spells themselves; I could make it rain in the Room of Requirements, or bring up a wall of fog, but doing that in a small room and doing that for a whole sky were incredibly different things.
Umbrus Shade, The Incredibly Annoyed Ravenclaw
Book&Literature · OmnipresenceBeing