Spirit Invocation.
Divine Descent.
Divine Presence.
These strange arts, methods, and Supernatural Abilities had existed since ancient times. Since gods had existed, since humans discovered that gods existed, borrowing the power of gods for one's own combat and survival had been only natural.
Legend had it that the most important part of cultivating this method was elevating the essence of one's life. It was not for the sake of wielding any particular technique, but to become an enormous vessel—while others forged an equal measure of life essence into blades and swords, they forged theirs into a great pool, which could then bear immense power far beyond the limits of their own lives and accomplish all manner of unfathomable, incredible feats.
As though aided by a god.
As though blessed by Heaven.
Heavenly Will descending upon the body.
Heavenly Will and Divine Intent had always meant much the same thing. Some people, at moments of crisis, could unleash strength far beyond their own abilities—even beyond their upper limit. If asked how it felt, they themselves could not explain it. They could only say, "It was as though something in the unseen guided me," or, "A clearer, sharper will seemed to descend upon me."
Could it then be said that the power of invoking a god was to have the will of gods and Heaven completely replace a person's own will—complete proxy control?
Well... not entirely.
Because most people—especially those whose cultivation had not reached a certain realm—already possessed wills that were slow, dull, one-sided, and unperceptive.
To control someone's body entirely from afar, setting aside the delay, was far too inefficient in terms of power expended. Yet without complete control, it was difficult to ensure the safety of the one who had invoked the god's descent.
So... guide them.
Guide them