Outside the cave, Hu Yue and the rest were waiting with bated breath. Bei Feng had saved their life and more importantly, they had avenged Zheng Jun who was their teacher and foster father. They naturally did not wish for anything to happen to their benefactor.
Loud booming noises drifted out from behind the metallic door constantly, but Hu Yue and the rest did not dare to go in. They were worried that they might end up dragging Bei Feng's group behind.
"Bang!"
The cave shook violently, and a huge cloud of dust and volcanic ash blasted out. Hu Yue and the rest who were standing outside were directly sent flying.
"What's going on, why was there such a huge explosion!"
Hu Yue and the rest looked at each other with shock. Everyone was covered in dust, and some of them even suffered some light internal injuries.