A terrifying ancient eldritch entity, cthulhu mythos, cosmic horror

a terrifying ancient eldritch entity, cthulhu mythos, cosmic horror, long tentacles, wings, divine and demonic form, cloak, contrast, relativity, quantum mechanics, abyss, nightmarish existence, insane, bizarre, dark moody atmosphere, cinematic lighting, dramatic shadows, muted colors, chiaroscuro，Transition from black and white on the left half to bright colors on the right half，Ensure seamless integration between the two halves，No dividing line，The scene is the same on both sides，Black and white pencil detail on left side，Right fill color，The mixture formed in the whole image，Perfect details, animation art style, Large murals, Strong contrast between light and dark