Time to move

There is an experience and knowledge of the ancestors behind techniques.

Thus, Xue Ren spent some time learning these. He had nice amount of these from Daria's collection and thanks to his powers, Xue Ren was easily absorbing the common techniques of the legendary race.

Right now, he was punching forward non stop releasing the fire specks that were crying out with the beautiful screech. There were a lot of specks, so Xue Ren had done good job learning these. 

Knowing that vermillion bird's fire is about quantity, Xue Ren was working to summon as much fire specks as possible.

'So everyone is a human with the bloodline implanted.'

That's the reason as to why Daria and Guri have to work hard simply to change into the vermillion bird. However, it also implies that the main volcano is the place where the pure vermillion bird's gather.