Under normal circumstances, the Devil Tree Battle Soldier was only able to fight a ninth rank tribe. Moreover, after the fight, it would have consumed a huge amount of physical strength and it needed seven or eight days before being able to continue.

If a ninth rank tribe only gave the Devil Tree Battle Soldier a 25% chance of increasing its rank, then the Devil Tree Battle Soldier would need at least half a year of continuous fighting. 

However, with physical strength perseverance and life force healing, the Devil Tree Battle Soldier would be able to get rid of a tenth rank tribe and raise its chances of rising a rank by 20%. Moreover, it would be able to recover its physical strength in a short period of two days.

Yu Sha’s two techniques didn’t have visible effects, but they greatly reduced the amount of time they needed to train. This made Chu Mu display a seldom occurrence of looking more favorably upon this woman. It seemed that using her as a slave was a wise choice.

After getting rid of the tenth rank tribe, the Devil Tree Battle Soldier was 70% of the way to advancing a rank. If they spent approximately another three days more getting rid of another tenth rank tribe, the Devil...