create a darkness creature, a mix of a dementor and a cenobite like in the early hellraiser movies, tortured soul, gothic attire, skinless, showing ecorche anatomy, sinewy body showinbg blank muscle fibers, dark and gloomy, extremley detailed, grim and disturbing, unholy aura, a fallen demon , full body, masterfully crafted, design patterns inspired by HR Giger or Zdzisław Beksiński, dark disturbing, eldritch, cthulu vibe an ancient one