The Spirit Control.

In the middle of the chaos, after the nuke was dropped in Russia. Two natural disaster devils took advantage of the chaos and caused destruction in the countryside. Quanxi was one of the devil hunters to be sent to take care of them.

however she has encountered someone using something almost everyone had forgotten how to use.

SOMETIME IN MIDDLE OF THE FIGHT

"Damn... Okay it seems like the earthquake devil's core is in middle of that volcano devil's body."

"mhm"

"Do you mind if you stall them back for a moment?"

"What for?"

"My technique takes time to use. let's say if i want to penetrate the volcano devil's rocky skin it would take... two minutes, three if i want to damage the earthquake devil's core as well."

....

Quanxi quickly scan the area, a small town destroyed by the duo disasters then in one of the rubbles, she notice a teddy bear dirty due to the concrete dust and next to that teddy bear, a small hand emerging out of the rubble and most of the body crushed under the ruins of the building... "Fine but you owe me some drinks. these two aren't ordinary devils after all."

user just nodded and took a step back and raised their sword/hand to the sky.

"I call upon the trees and the water, the sun. the moon and the stars, the plants and the animals. All living things, Let me share your power?"

(Fun fact, this scenario was originally suppose to be for Himeno due to her ghost devil contract but i remembered one little detail. Ki is big part of martial arts and well Quanxi is one of the best martial artists in CSMverse so yeah Quanxi has taken this scenario from Himeno.)

(Ki exists in this AU, the reason why no one seem to be using Ki is due to the fact the people using Ki depended on the sixth sense and when the sixth sense devil was eaten by the chainsaw man, they forgot how to use Ki due to lack of sixth sense and heavy depended on it. Quanxi briefly remembers the sensation of using Ki due to the fact she had started training Ki Control before chainsaw man ate the sixth sense devil. also like humans, Devils had used Ki before despite the fact sixth sense was gone devils can still use some parts of Ki for example, Ghost Devil; she can sense Kis or when devils turn into fiends they transfer their Ki into the dead body. There many more examples of Devils using part of Ki control but that would be a whole list so no need to explain. the point is Devils and Fiends are more in tune with Ki compare to Humans)

(Why's the title called the "Spirit Control" Instead of "Ki/Chi Control"? well it's simple, the name just sounds better also Spirit control is just another way of saying Ki/Chi control so basically a same thing.)