The Myriad Evil Yin Talisman could transform foul qi and spiritual qi into each other. The greatest use of this divine power was purging foul qi from a cultivator's body and soul.
Xuanming Heavenly Venerable knew that Gao Xian cultivated Blood River Celestial Venerable's methods and had inherited the Blood River Banner. Gao Xian had slaughtered countless beings; whether or not he acted under some grand banner, he was bound to accumulate an immense amount of foul qi.
Moreover, Gao Xian clearly had no intention of abandoning the Blood River methods. Before long, the Six Paths outer demons would descend, and there would inevitably be another catastrophe where living beings were devastated and blood flowed until it could float pestles.
High-level cultivators actually feared foul qi most of all. Once their body and soul were tainted by it, the mild outcome was the complete loss of cultivation; the severe outcome was the destruction of the divine soul.
Being stained with foul qi could also draw evil spirits.
The Creation Golden Book governed all spiritual qi beneath heaven, but foul qi and baleful qi alone lay beyond its restrictions. Thus, there was no limit to the power level of evil spirits.
No matter how powerful a cultivator was, they might draw an equally powerful evil spirit.
Beyond that, foul qi could also trigger mighty heavenly tribulations.
Gao Xian understood Xuanming Heavenly Venerable's intention. Giving him the Myriad Evil Yin Talisman meant letting him go all out without worrying about foul qi polluting his body and soul.
On that merit alone, the Myriad Evil Yin Talisman was a supreme treasure.
Only after Sister Bai explained it did Gao Xian learn that the Myriad Evil Yin Talisman could even perform all kinds of transformations upon baleful qi.
To ordinary cultivators, baleful qi was