A hauntingly beautiful mermaid emerges from the depths of a mist-laden lake, her wet skin glistening under the eerie, dramatic lighting. Her eyes, mysterious and siren-like, captivate and unsettle with their unholy allure. The dark, intricate design of her scales and flowing hair are rendered in photorealistic detail, creating an atmosphere that is both creepy and mesmerizing. The scene is cinematic in quality, capturing the essence of horror with its dense, shadowy surroundings. The composition is captured in stunning 8k resolution, emphasizing every intricate element of this unsettling yet captivating creature.