By the time Lu Xuan finished off Long Feihua and killed his way to the headquarters of the Xuanhuo Sect, they were already unable to complete such a shocking blood sacrifice. Moreover, most of the remaining people did not know the method of such a blood sacrifice.
After all, everyone would be afraid. If the entire Xuanhuo Sect knew that the higher-ups still possessed such a technique, they would sacrifice all of them when necessary.
The entire Xuanhuo Sect would probably explode in an instant. Many people had died for the Xuanhuo Sect, and most of them were even willing to.
However, they had died for the Xuanhuo Sect to obtain glory and wealth, or to obtain the resources of the Xuanhuo Sect for their cultivation. They did not die for the Xuanhuo Sect as cannon fodder.