Azathoth

The Blind Idiot God, Daemon Sultan, The Deep Dark

Azathoth cannot be described since he is always changing and is so vast everyone envisions /conceptualizes him differently.

Azathoth has been hinted at ...ancient legends of Ultimate Chaos, at whose center sprawls the blind idiot god Azathoth, Lord of All Things, encircled by his flopping horde of mindless and amorphous dancers, and lulled by the thin monotonous piping of a demoniac flute held in nameless paws.
- HPL, "The Haunter of the Dark"