Player From Beyond The Void (Cthulhu Mythos)

""I saw Zann start as from the hint of a horrible shock. Unmistakably he was looking at the curtained window and listening shudderingly. Then I half fancied I heard a sound myself; though it was not a horrible sound, but rather an exquisitely low and infinitely distant musical note, suggesting a player in one of the neighboring houses, or in some abode beyond the lofty wall over which I had never been able to look."

"But I did not pursue this course for more than a moment; for when the dumb musician recognized the whistled air his face grew suddenly distorted with an expression wholly beyond analysis, and his long, cold, bony right hand reached out to stop my mouth and silence the crude imitation. As he did this he further demonstrated his eccentricity by casting a startled glance toward the lone curtained window, as if fearful of some intruder—a glance doubly absurd, since the garret stood high and inaccessible above all the adjacent roofs, this window being the only point on the steep street, as the concierge had told me, from which one could see over the wall at the summit."

"Yet when I looked from that highest of all gable windows, looked while the candles sputtered and the insane viol howled with the night-wind, I saw no city spread below, and no friendly lights gleaming from remembered streets, but only the blackness of space illimitable; unimagined space alive with motion and music, and having no semblance to anything on earth. And as I stood there looking in terror, the wind blew out both the candles in that ancient peaked garret, leaving me in savage and impenetrable darkness with chaos and pandemonium before me, and the daemon madness of that night-baying viol behind me.""

- H.P.Lovecraft describing the Player From Beyond The Void.

Description
The Player From Beyond The Void is a cosmic being first appearing in "The Music Of Erich Zann" (1921). Player From Beyond The Void has no known Name, and unexplainable for words, as it is a being beyond the concepts of the Ultimate Void, where the Outer Gods live. It is mostly known causing paranoia for the main character of "The Music Of Erich Zann".

Powers
Not much is known about the Player From Beyond The Void but since it is beyond the Ultimate Void, it should be extremely powerful. Although no where near as powerful since it lives beyond the Ultimate Void it could be immune Azathoth Reality Erasure.