```
"However, the concentration of the Soul-extinguishing Incense here is quite low. Its effective range is limited and it will degrade on its own. In about a year, the Soul-extinguishing Incense here will dissipate, so there's no need to mind this place."
Fairy Qi Xun continued to speak.
"Fairy Qi Xun is indeed knowledgeable. Qing Tan admires you."
The Zheng bird, Qingpeng, Huangmi, and Frost Wolf are the four most powerful demonic beast clans in the Yunhua Mountain Range of the Southeast Region, each with more than five Demon Venerables of the Fifth Stage.
Yu Qingtan had read many books introducing these clans, but she really didn't know that the poison sac of a Fifth Stage Zheng bird could be used to produce Soul-extinguishing Incense.
Zheng bird, adept at poison arts, makes sense that the poison sac of a Fifth Stage Zheng bird Demon Venerable, capable of using soul poison, could be used to produce the Soul-extinguishing Incense.
