After listening to the entire song at the door, Dong Tianyu suddenly found his body stiffening bit by bit. Touching his arm, he discovered the skin had become quite resilient.
If a person donning the Gold Bell Cover Iron Cloth had conditioned their skin to such a state, it would indicate they had reached a preliminary level of mastery.
However, Dong Tianyu had not cultivated such a technique, so this change in his body was definitely not normal.
This situation was not only noticed by Dong Tianyu. Other survivors hiding in the vicinity also became aware of it.
Some speculated that the condition might have been triggered by the singing from the stage, so a few people picked up random objects nearby and threw them forcefully towards the stage, far from the spots where they had been hiding.