Hearing this, Wang Daoyuan was utterly astonished.
He possessed the Gui Water Nether Flame and Crimson Sun True Fire, which could continuously produce Pure Yin and Pure Yang Qi.
Back when he had helped Zhou Luan nurture her Nascent Soul, it had taken several years.
To store enough for three people to break through to Spirit Transformation within ten years was by no means a simple matter.
For the White Bone Hall to accomplish this, there was an eighty percent chance that it possessed some crucial resource.
Either it had high-grade spiritual items containing Pure Yin and Pure Yang Qi, or it possessed some treasure capable of producing Pure Yin and Pure Yang Qi, much like the four-restriction black stone in his hands.
If it was the former, it was no great matter.
If it was the latter, it was simply too terrifying.
If they could nurture three Spirit Transformation Cultivators in ten years, then in a few hundred more years, would any other force in the Seven Stars Sea Cultivation World still have a way to survive?
Even if the White Bone Hall's inheritance was exceptionally poor, no matter how poor it was, Spirit Transformation Cultivators were still Spirit Transformation Cultivators.
Even a cultivator like him, with a domain divine ability, could at most withstand the joint siege of ten-odd Early Soul Transformation cultivators at once.
And that was assuming none of them were exceptionally formidable. Otherwise, he could not guarantee a safe retreat.
In other words, the White Bone Hall could nurture combat strength comparable to his own in just over thirty years.
Moreover, the strength of these Spirit Transformation Cultivators would not remain unchanged. They could also cultivate and improve their own strength.
If the White Bone Hall were allowed to develop like this, he would not