C585 Liu Ying Is a Level Three Beast

Wang Mang naturally knew what that black beast shadow was. It was the remnant soul of the Demon Beast in the Demon Core. It was also the most dangerous part of advancement. As long as the remnant soul was extracted from the energy... And expelling it from the body, the advancement is a success. On the other hand, it would be a failure.

When Wang Mang advanced to the Third Order