Chapter 692: Chapter 691 Enemy Tracks Reappear!

Tang Zhen looked at the old man with a suspicious expression, his eyes filled with ferocity and resentment, and slowly shook his head.

"The elixir you mentioned actually contained a strange insect from the very beginning. After you swallowed it, it parasitized your body and spread throughout your muscle tissue."

It can rapidly enhance your muscle explosiveness, causing a surge in strength, which is why you feel like you've been rejuvenated!