a skinned skull nightmare, tentacles, vines and thorns, illustrated by greg rutkowski, cgsociety, artist interpretation, artstation, contemporary art, 4 k, 8 k, artstation digital, artstation horror, trending on behance, lovecraftian art style, dark blue atmosphere, vignette, beautiful lighting, illustrated by h. r. giger and gaston bussiere, trending on artstation, cgsociety contest winner, 4 k, 8 k