C3613 What Is Immortal

Immortal Crystal was also a kind of immortal substance, but the difference was huge.

In King Of Hu'er's diary, Meng Fan had already clearly seen the core of the "the Road To Immortality".

It was an undying substance.

King Of Hu'er wasn't sure what exactly an undying substance was. In fact, he could see it in King Of Hu'er's diary