C418 Co-refining

It wasn't that Zuo Feng didn't want to give the energy to the Mark of the Beast to Ni Feng, but he didn't know what to do next. Or perhaps, he should say how to use the Mark of the Beast to help him recover.

The energy of the beast markings was like that of a black stone. Zuo Feng now knew that it was actually a part of the body of a divine beast at that time