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

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