Walking on the ground, Ye Qing already understood the basic operating principles of the Demon Sect's mechanism. It seems that the Demon Sect has used some secret technique to alter the ground, allowing it to absorb a person's inner strength. The absorbed inner strength is then used to operate the mechanism inside, which is why the mechanism can match the strength of those who enter; that's the principle behind its operation.
Although Ye Qing didn't know exactly how the Demon Sect achieved this, he had already become somewhat numb after witnessing the Inverted Five Elements mechanism outside. Human wisdom is endless, and who knows what methods the ancients used to create such mechanisms.
