Cthulhu Mythos Cosmology and Gods

Azathoth

Azathoth is described at multiple points as the lord of all existence:

"Before his eyes a kaleidoscopic range of phantasmal images played, all of them dissolving at intervals into the picture of a vast, unplumbed abyss of night wherein whirled suns and worlds of an even profounder blackness. He thought of the ancient legends of Ultimate Chaos, at whose centre 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 daemoniac flute held in nameless paws."

"There were suggestions of the vague, twilight abysses, and of still vaster, blacker abysses beyond them—abysses in which all fixed suggestions of form were absent. He had been taken there by the bubble-congeries and the little polyhedron which always dogged him; but they, like himself, had changed to wisps of milky, barely luminous mist in this farther void of ultimate blackness. (...) Eventually there had been a hint of vast, leaping shadows, of a monstrous, half-acoustic pulsing, and of the thin, monotonous piping of an unseen flute—but that was all. Gilman decided he had picked up that last conception from what he had read in the Necronomicon about the mindless entity Azathoth, which rules all time and space from a curiously environed black throne at the centre of Chaos."

"The passage through the vague abysses would be frightful, for the Walpurgis-rhythm would be vibrating, and at last he would have to hear that hitherto veiled cosmic pulsing which he so mortally dreaded. Even now he could detect a low, monstrous shaking whose tempo he suspected all too well. At Sabbat-time it always mounted and reached through to the worlds to summon the initiate to nameless rites. Half the chants of the Sabbat were patterned on this faintly overheard pulsing which no earthly ear could endure in its unveiled spatial fullness. Gilman wondered, too, whether he could trust his instinct to take him back to the right part of space. How could he be sure he would not land on that green-litten hillside of a far planet, on the tessellated terrace above the city of tentacled monsters somewhere beyond the galaxy, or in the spiral black vortices of that ultimate void of Chaos wherein reigns the mindless daemon-sultan Azathoth?"

"Out in the mindless void the daemon bore me, Past the bright clusters of dimensioned space, Till neither time nor matter stretched before me, But only Chaos, without form or place.

Here the vast Lord of All in darkness muttered Things he had dreamed but could not understand, While near him shapeless bat-things flopped and fluttered In idiot vortices that ray-streams fanned.

They danced insanely to the high, thin whining Of a cracked flute clutched in a monstrous paw, Whence flow the aimless waves whose chance combining Gives each frail cosmos its eternal law.

"I am His Messenger," the daemon said, As in contempt he struck his Master's head."

Azathoth gave birth to the Outer Gods as well as creation itself. For context, refer to and compare it to the quote below.

"Trembling in waves that golden wisps of nebula made weirdly visible, there rose a timid hint of far-off melody, droning in faint chords that our own universe of stars knows not. And as that music grew, the shantak raised its ears and plunged ahead, and Carter likewise bent to catch each lovely strain. It was a song, but not the song of any voice. Night and the spheres sang it, and it was old when space and Nyarlathotep and the Other Gods were born."