A hauntingly beautiful mermaid emerges from the misty depths of a secluded lake, surrounded by an aura of wetness and dense fog. Her form is both enchanting and unsettling, embodying the essence of a mysterious siren with unholy allure. The scene is steeped in a sense of eerie horror, as shadows dance across her intricately designed scales and seaweed-like hair. Dramatic lighting casts an otherworldly glow over the water, enhancing the mermaid's photorealistic features. The atmosphere is cinematic and vivid, capturing the haunting allure of a creature torn from dark folklore, rendered in stunning 8k resolution.