Chapter 69: Chapter Sixty-Nine: Slaying the Keystone Guardian Monster!

The strange sound came from inside the ruins. To survive in this thick toxic smoke, the person must be no ordinary individual.

Tang Zhen's heart tightened, and he immediately raised his rifle and aimed, his eyes fixed on the entrance to the ruins.

The homeless people also sensed that something dangerous lurked behind the still-lingering smoke, threatening their lives.