Sinister extraterrestrial being with leathery wings and a shaggy black torso, elongated limbs ending in dagger-like claws, grotesque visage with a fearsome maw filled with serrated teeth, emerging menacingly from a mist-laden cavern, blazing orange eyes, evocative of cosmic horror, detailed and intricately designed, high-contrast lighting, hyper-realistic, filmic quality with cinematic texture, ultra-high resolution in a vertical composition.