The Sacred Aura Canopy was a technique that was created on the roots of the already existing Vital Armor Canopy.
To put it in the most simple sense, the Vital Armor Canopy was meant to be taught to people who were just learning the arts of the sect. The Sacred Aura Canopy was reserved for those who were already familiar with the Dao that the sect practiced.
'On that note, this tomb is certainly the property of a Sect Leader.'
These trials were designed for disciples of a specific influence. The lessons being taught throughout were related to vitality and wood, which must have been their main focus.
This was the same. It was impossible to expect someone who didn't have a relationship with the sect to understand the subtle nuances within.
