Bloody-Soul Art, or to be more accurate the Bloody-Soul Secret Art, was one of the best Secret Arts in the history, and anticity of Navita.
Different from all other Magic Cultivation Arts on this new planet, Bloody-Soul Secret Art didn't receive magic particles from the environment but from the blood and soul of beings.
The cultivators of this Secret Art were able to cultivate through the warm blood of living beings, and their souls.
To put it bluntly, they were the same as vampires of Roy's old planet Earth, with the difference that these guys became much stronger, and fed upon their target's souls as well.
It wasn't just the Magic cultivation Art that made Roy extremely excited about this, as he already had "Broad as Universe" and he could cultivate blood element magic as well.
What made him that excited to receive that disgusting book, was the knowledge and research upon the human body, and soul that this technique provided.
