This technique greatly depletes the user's mind and soul. After using it, one must endure the backlash of the Imprisoned Wandering Souls, along with significant risk of possession and even devouring the master.
Moreover, cultivating this technique subtly distorts the cultivator's temperament, though often the cultivator remains oblivious to this change, much like how Gongsun Xin now appears utterly different from several years ago.
Over the years, Gongsun Xin has used this technique to imprison thousands of wandering souls, most of them were souls of those who died during the refinement of Human Pills.
At this moment, Gongsun Xin's eyes are bloodshot. This Wraith General, formed from the aggregation of thousands of wandering souls, is his greatest ace, only having taken shape last year. Using it now is exceedingly risky with high chances of devouring the master, and he attributes all his resentment to Su Mu.
