C1220 Revenge is coming

Qu Pangsan and I signaled Li Hesheng and the rest not to get too close in case we were alerted, and carefully placed our ears on the wall, we immediately heard someone talking inside, and it was not even in Chinese yet, just as I was wondering if it was Japanese or Korean, the entire wall suddenly crumbled towards us, followed by a surge of energy, that came from beneath our feet, rumbling loudly