C897 Freeze the Mortal World

Bing Yu and the others rested for a while and planned to leave.

Their target was the Yin Yang Valley. They wanted to find the Yin Yang Stone.

The Yin Yang Stone was a rare stone that was formed by absorbing the essence of the heaven and earth, and it was the best material to forge weapons.

Even a small piece could greatly increase the level of a weapon.

Therefore