"Huh? Why did the ten disciples stop suddenly? I think they can go further than a hundred and fifty meters, right?"
One of the disciples spoke with a baffled look while many others also raised the same question.
"It's not about the limit of mystic Qi they can resist but the problem of depth. The further you go, the deeper it gets. Although you can use your spiritual Qi to make yourself float in the water, you need to divert some of your attention to do this. It might sound easy, but one mistake can lead to rapid breakthroughs, so unless one is one hundred percent confident, no one will gamble for short-lived benefits."
A disciple from first grade spoke. This was not really some secret, but not many can reach the hundred meters, not to mention hundred and fifty, so unless there was a promising disciple, no one would bother to explain this.