Xu Feng wasn't kidding when he mentioned the System was very meticulous.
The fact that he was also consumed by the will unconsciously made him realize he wasn't as mentally fortitude as he had anticipated to be.
Truth be told, had it not been for Carmen's presence and his concern being focused on her, then he might have stumbled by the fourth challenge.
The first 3 challenges were still something he could relatively handle, but the fourth one was impossible.
As for Carmen, it was the opposite for her. The first 3 challenges were impossible for Carmen, but the fourth challenge was easy for her.
Maybe this was the reason why the secret dungeon permitted a maximum of 5 people to enter.
5 people, each one handling a specific will in the first 5 challenges.
As for the sixth challenge, it was a memorization theme, so 5 people should be enough to memorize a section of their side.
