C960 Precision cutting technique

"Four hours huh …" Long Bufan muttered to himself and looked at the trembling sound coming from outside the stone door. He thought that the law barrier in the stone room was meant to protect the Ancient Lightning Symbol Tree and would not be broken that easily. He then nodded his head to Mu Rongyin and said, "Alright, I will wait for you."

Afterwards, Mu Rongyin did not speak anymore