He felt an incomparably pure and vast Essence, immense yet possessing a unique Extreme Yin Attribute, pour into his body through the Magical Power channels like a torrential flood.
This Essence was incredibly dense, containing over a hundred years of arduous labor from a Mid-Stage Foundation Establishment Daoist Master. It also held Liu Yunhua's unique Yin-Yang Dao Essence, nurtured by the Dao Foundation she had condensed.
It was an immense boon for the Dual Cultivation Technique.
It wasn't that Xu Yunfan was stealing Liu Yunhua's Dao Foundation. It was that she usually treated others as Human Cauldrons, and now that she was being used as one for the first time, years of her accumulated Essence were leaking out uncontrollably.
The moment it surged in, it was intercepted and refined by the Divine Sky Thunderbolt Magical Power ceaselessly circulating within Xu Yunfan.
