After seeing Xu Qiuhui off, Li An sat in the shop, deep in thought.
The Profound Yang Sect had obtained the Yin Yang Demon Furnace Skill over a decade ago, which aligned with some information he had previously acquired.
It seemed that Mu Qingwan had been selected as a furnace.
However, the Yin Yang Demon Furnace Skill obtained by the Profound Yang Sect should be similar to the "simplified version" currently circulating widely, otherwise there would be no need to research for many years to deduce the side effects of the Yin Yang Demon Furnace Skill.
The issues during Spirit Root advancement were detailed in the complete version that Li An had acquired.
He just didn't expect that he could become a heart demon to a Foundation Establishment Stage demon cultivator…
Were the demon cultivators of this era really so mentally fragile? The more he thought about it, the stranger it seemed…
But that's not important anymore.
