C971 Death Row Prisoners in the Mine

"I didn't expect this underground tunnel to be so deep! I really don't know how these energy stones were mined! Could it be that someone has been mining energy stones deep underground?"

Loong Fei thought for a while in his heart. Hence, he quickened his pace and wanted to reach the depths of the mine as soon as possible.

Just as Hua Mazi had said, this underground tunnel was not only very deep