C4430 A Hidden Master!

In the Heavenly Battle City.

Li Xuan was sitting with a secret manual in his hand. He was concentrating on comprehending it, but he felt irritated.

He closed the book and looked at the dark stone wall as he muttered to himself.

"Why am I so irritated? I can't calm down. Sigh."

Li Xuan sighed with a dejected expression, as if he had suffered a great blow to his heart.

At this moment