haunted gothic castle at night, old citadel during thunderstorm, generative ai

castle old gothic night dark medieval sky halloween lightning haunted background blue building chateau creepy dramatic europe fairy fairytale fantasy generative ghost gloomy hallowen helloween horror house light mansion midnight moonlight mystery mystic nightmare ominous palace scary shade shadow spooky tower twilight vintage wallpaper thunderstorm thunder storm citadel ai view castle scene theme terror concept