```
It was a transparent water crystal bottle, containing some unknown powder that appeared gray, giving off a very thin, light feeling, somewhat like the appearance of "burned paper money ground to dust."
"Add this, just a little is needed.
Another main ingredient was the supernatural elements from the Ghost Servant.
Those supernatural elements were normally untouchable by humans, but when they fell onto the Ghost Servant, they were somewhat filtered, weakened a bit.
Yet, even so, people still couldn't directly absorb the power contained within the supernatural elements.
But this ash seemed to build a bridge between the supernatural and humans, then used the supernatural elements as a guide to absorb the Yin Qi of heaven and earth to enhance the Divine Soul.
However, the teacher didn't say where this ash came from.
Next time... you should ask Sister Fox Immortal."
