Ji Ning first soulscoured him, then took away his treasures. Of course…he gave the True God some spirit-pills as well. Due to their length battle, this True God had used up quite a bit of his divine power; if he wasn't given enough spirit-pills, his life probably wouldn't last for much longer. Although there was no way to replenish his divine power, replenishing his Immortal energy would also suffice for him to sustain his life.
There were relatively few Ki Refiners who also trained as Fiendgod Refiners, but almost every single Fiendgod Body Refiner was also a Ki Refiner; the only question was how talented they were in that respect. Subhuti, Daoist Three Purities, Tathagata, and many others were all born as True Gods, and they eventually trained to become Daofathers of the Great Firmament as Ki Refiners.
