a haunted mansion engulfed in thick fog, with lightning illuminating the sky, setting the stage for a spine-chilling halloween

foggy ghostly spooky moonlight gothic abandoned moody mystical generative cemetery illustration night evil mystery dark moon light grave fantasy frightening architecture mansion tower victorian aged old silhouette scene eerie home fog grunge fear halloween background dramatic haunted mysterious building nightmare darkness misty graveyard backyard ghost horror creepy atmosphere scary engulfed thick lightning illuminating sky setting stage for spine-chilling experience experience