Chapter 588: Clue From the System

Not long after Jack had finished the evolution, with several changes occurring in his body, something else happened. For some reason, he felt that his heartbeat rate had suddenly increased.

That was something that surprised him completely. Normally, the heartbeat would only increase in certain situations, but at this moment, he was just relaxing, and he had not done anything strenuous.

Additionally, it was not as if he had experienced something that frightened him or anything like that. So, he failed to understand the reason why the intensity of his heartbeat had suddenly increased.

This was the first time that he was experiencing something like this. And even the information that he possessed in his mind about medicine did not explain anything like the one that he was currently experiencing.