A menacing extraterrestrial entity with leathery, bat-like wings, a shaggy obsidian torso, and elongated limbs boasting razor-like talons emerges from an ominous veil of mist cloaking a shadowy cavern. Its grotesque visage is dominated by a gaping predator mouth filled with rows of glistening, needle-sharp teeth, while its piercing, deadly amber eyes glow with malevolent intent. This creature is a testament to cosmic horror, its dark and intricate form accentuated by dramatic lighting that casts eerie shadows, achieving a photorealistic, cinematic portrayal with subtle natural textures and grain, capturing the sheer terror in exquisite 8k detail.