Ultra detailed dark fantasy monster, massive creature with four muscular arms and long claws, glowing red eyes, sharp teeth, cracked obsidian-like skin with lava glowing through the cracks, large curved horns, torn bat-like wings, standing in a foggy cursed forest at night, cinematic lighting, volumetric fog, dramatic shadows, hyper realistic, 8k, highly detailed textures, epic horror atmosphere, concept art, game boss design