True Understanding of Celestial Immortals can also be termed Heavenly Demon True Understanding.
It is the supreme magic skill summarized directly from the Sky Extreme Sword by Emperor Tianji in pursuance of reaching the Earthly True Immortal state based on his own comprehension.
Given that the magic skills leading to the state of Devas were in the hands of only those top sects, the inheritance value of becoming an Earthly True Immortal was almost immeasurable in monetary terms.
In the present world, aside from a few Divine Weapon Forces, no other forces possess an Earthly True Immortal level inheritance.
Nor is this an exception for powers like the Taiyi Sect, the Earth Mother Divine Sect, and the Tianhai Sword Sect, which have Devas in residence.
Even if it weren't for the widely propagated magic skill of Immortal Golden Body for forging a Saint Body, many would not know how to achieve sainthood.
However, becoming a Saint, congealing a Saint Body is only one factor.
