Chapter 6324: Chapter 584 Temporary Retreat and Concerns

The residents of the ancient city, who were locked in a fierce battle, suddenly heard a strange sound, flowing rhythmically like waves.

At the beginning, it felt like countless insects were buzzing and crawling, causing uncontrollable itching in all the meridians of my body.

A few seconds later, the sound changed, like the sound of a glacier cracking as ice and snow melt in early spring.