However, unlike Purple-Faced Daoist, the three "Fate Severing Tribulations" he needed to undergo to attain the Hidden Destiny Realm—even though the last had already reached the Mahayana level in terms of heavenly tribulation power—were in truth far weaker than Purple-Faced Daoist's "Lifespan-Exhaustion Heavenly Tribulation" for extending his life by over a hundred thousand years.
In other words, the requirements for setting up this formation could be lowered considerably for him.
There was no need to rigidly satisfy the harsh condition of "setting up the formation in a lower realm."
"Still, this formation consists of an inner and outer formation... The requirements for the outer formation can be lowered; it need not be placed in a lower realm with weak heaven-and-earth power like the Human Realm... But the conditions for the inner formation must be met no matter what."
Wei Tu rubbed his brow and looked with a headache at the cultivation art appended to the end of the jade slip—Corpse-Zombie Secret Art.
As Purple-Faced Daoist's primary cultivation art, this art shared the same origin as the Spirit Zombie Secret Canon stored in the underground palace of the Sunken Corpse Badlands—or rather, the Corpse-Zombie Secret Art was the advanced version of the Spirit Zombie Secret Canon for realms above the Integrated Body Realm.
Thus, since he had long studied the Spirit Zombie Secret Canon, beginning cultivation of this Corpse-Zombie Secret Art would not be difficult for him. At most, he would achieve success within three or four years.
But... cultivating this art to the point where he met the requirements to inscribe the inner-formation runes of the "Corpse-Sealing Grand Formation" within his Dharma body could not be accomplished through a few years, or even a few decades, of hard work.
He needed to cultivate this art until his Primordial Spirit Dharma