C3439 Who Ignited the Fire of War

"My wife, this is the mutated Internal Universe, the outer shell has become stronger, can it fly higher?" Ning Caichen and Meng Ya communicated with each other.

"Yes, to ascend to the fourth stage of the Refinement Realm from the Third-Layer Sky, the Inner Cosmic Shell must be sturdy, otherwise, it would not be able to withstand the crushing pressure of the heaven and earth from the fourth stage