C1452 Fuse into one!
The most important thing was that the cold yin energy in this place was simply uncontrollable. If the Primordial Spirit were to fail and be completely devoured by the cold yin energy, then he would not even know how he died.
It was also because of this that even if a cultivator thought that this place could be used to refine Primordial Spirit, they wouldn't dare to carelessly try it