C315 Collecting Formation

I clenched my teeth and stomped my feet. Just like that, I opened the box that contained the Sea Boiling Formation of Zhang Sheng.

Inside the box was an ancient map. The map was written in beast skin, and it was obvious that it had been written a long time ago.

According to the legends, Zhang Sheng was a great cultivator of the Han Dynasty. However, judging from the ancientness of this map