Human Emperor’s Secret Vault

Through the soul search, Mo Xiu easily learned the location of the Human Emperor's vault and knew that the Human Emperor's vault was not fully opened.

It was not that the Sect Master didn't want to fully open the Human Emperor's vault, but that there was a cave in the Human Emperor's secret vault that could not be opened by the Sect Master.

The Sect Master once tried various methods, but he couldn't help but give up the cave.

However, he knew that there must be good things in that cave. Even if he couldn't open it himself, he couldn't let others open it.

Therefore, although he was in Everlasting Martial Sect, he sent a lot of people to guard the secret vault. 

Everlasting Martial Sect's Human Emperor Secret Sutra and several things that the Sect Master used to deal with Mo Xiu before were indeed derived from Human Emperor's vault.