Bai Fan had no choice, a life debt needed to be repaid indeed!
"But it wasn't necessary."
If you couldn't beat someone, couldn't you just make a strategic retreat?
[You stopped Bai Fan]
[You used the portable warehouse to sneak Bai Fan underground]
[You activated "Human Jinx"]
[You appointed Shi Si to be cursed with bad luck]
[Your current situation was not good]
[Shi Si would experience major bad luck in the coming days]
He didn't need to persist in a hard fight with Shi Si.
He knew Shi Si was here to gather survivors, and he had no conflict with Shi Si. Besides, to kill Shi Si, he didn't need to confront him head-on; slowly grinding him down with "Human Jinx" would be enough.
Big bad luck today, and more big bad luck tomorrow, he didn't believe Shi Si wouldn't die!
[You and Bai Fan returned to the school]
[You learned that Bai Fan could manipulate water]
[You asked him whether he could extract water from a human body]