C674 Heavenly demon avatar！！

Ten years!

Thinking about being trapped in this secret realm for ten whole years, Teng Yan felt his scalp go numb.

What did ten years mean?

The world had changed, and things had changed!

Even if Teng Yan were to be able to leave this Blood Soul Great Formation alive ten years later, he would believe that everything in the world would have undergone a tremendous change by that time