A terrifying nun stands at the threshold of an ancient, shadowy cathedral, her presence unholy and unsettling. Her ghastly visage is veiled in layers of tattered, dark robes, adorned with intricate symbols and designs that whisper of forbidden rites. Her hollow eyes pierce through the dim, flickering candlelight, casting a chilling aura. The atmosphere is thick with eerie silence, broken only by distant echoes. Photorealistic details reveal her ghoul-like features, and the cinematic lighting adds depth to the malevolent scene, capturing every sinister shadow in stunning 8k resolution, framed in a haunting 9:16 aspect ratio.