Chapter 676 All Heirs Must Die

And that secret organization had also covertly reached out to them, saying they could collaborate and help enhance their boxers' abilities.

Of course, at first, they were all skeptical.

But the secret organization offered to conduct an experiment to show them, allowing them to send someone to participate in the experiment. After seeing the effects, they could then decide whether to collaborate or not.

Moreover, with the rise of more and more people in the boxing market in the past one or two years, the position of several families was threatened. In order to dominate the boxing market, they had no choice but to take the risk.

Then, each family sent someone to participate in secret training, and the results after the training were all very good.

The people who went for the secret training saw significant improvements in their physical endurance and speed, and they didn't have any health problems.