Complex sentence: He uses the naked human body as his only expressive element, showing the isolated bodies entangling each other, merging together in a convoluted mass. They are overpowered by demons in near-human form, depicted in colours of every shade of decomposing flesh.
Split into simpler sentences: He uses the naked human body as his only expressive element. He shows the isolated bodies entangling each other, merging together in a convoluted mass. They are overpowered by demons in near human form, depicted in colours of every shade of decomposing flesh.