(Heartfelt thanks to Yume no Shouyou, Lei Xiang, Youcai Luobo, and Luo Zhi Qingyue for their tips!)
Magician's Craftworks, aboard a commercial cargo ship...
Inside a room filled with all manner of sophisticated medical equipment, devoid of even a sliver of sunlight, resembling both a hospital operating room and a research laboratory, there was a bed at the center...
On the bed lay Yaze Kanon, her eyes unfocused, like a vegetable. Under lights that seemed to have been installed from nowhere, flowing patterns rippled across her body, radiating a hidden power that no one could detect as it acted upon her.
Those patterns were the Spirit Evolution Formula!
The formula patterns used to create Artificial Angels!
It was precisely because of these formula patterns that Artificial Angels could turn their innate spirituality into power, receive divine energy flowing into their bodies from higher dimensions, assume the form of angels, and fight.
Only after having their bodies covered in this Spirit Evolution Formula could Artificial Angels initially qualify for evolution. Only then could they obtain the spiritual cores of others and raise the level of their own spirituality.
Unfortunately, not just anyone could have this Spirit Evolution Formula inscribed across their body. The foremost condition for transforming oneself into an Artificial Angel through the formula was possessing a certain spiritual constitution. In other words, one had to have the aptitude to become a powerful Demon Slayer.
Take Yukina, for example. She possessed a powerful spiritual body. Otherwise, she would never have become a Sword Shaman of the Lion King Organization.
Only those with powerful spiritual bodies could be affected by the Spirit Evolution Formula, allowing Artificial Angels to be born.
Of course, possessing a spiritual body was merely the first condition for becoming an Artificial Angel. To become a true angel,