C239 Iron Chain Hanging Rock

The tomb was dark and dry. Niu Er walked at the front, and his footsteps seemed to be a little careful as he tried to advance. It was obvious that he was dragging down his speed, but at this time, no one could urge him, because in this kind of dangerous situation, even if he was careful, it would not be excessive.

Niu Er took a step forward, and his footsteps landed solidly on the ground