Create an image illustrating a fearsome interpretation of the ancient deity Cthu

Create an image illustrating a fearsome interpretation of the ancient deity Cthulhu, as envisioned in Lovecraftian horror literature. Focus should be on establishing deep shadows and eerie lighting effects, with ominous facial features. Utilize a blend of dark and vibrant colors to evoke a sense of cosmic horror, simulating the effect of a digital painting made using professional equipment like a wacom cintiq pro.