(masterpiece, best quality, ultra-detailed, dark fantasy, horror scene),
a humanoid monster emerging from a swirling black vortex on the ground,
its body pale and deformed, muscles grotesquely twisted,
a hunched rotting back with two sharp bony blade-like limbs growing from it,
atrophied original arms shrunk into small claws near its abdomen,
the claws clutching forward as if to fix prey,
dark atmosphere, ominous lighting, eerie shadows, cinematic composition