A terrifying nun with an unholy aura, emanating a creepy and haunting presence, her figure enveloped in shadows. Her ghastly visage and intricate, detailed attire evoke a sense of dark horror. The atmosphere is enhanced by dramatic photography lighting, capturing her in a photorealistic and cinematic style. The composition is in stunning 8k resolution --ar 9:16, showcasing an unsettling blend of reality and nightmare.