A cursed swamp cathedral sinking into black water, towering gothic ruins covered in moss and rot, sickly green fog crawling over the marsh, dim swamp light glowing from cracked stained glass, twisted dead trees, flooded tombs, broken stone angels half submerged in mud, damp air filled with drifting ash and insects, oppressive supernatural atmosphere, demonic sacred horror, cinematic realism, ultra detailed, dark, intense, 8k