Of course, Lu Xuan was burning away the vital energy in his body. Even so, he didn't worry about this because he had already expected this type of consumption to occur.
Furthermore, Lu Xuan was absorbing the huge storage of mid-tier Spirit Stones in the Secret Realm of Tianhai City. Endless Spirit Qi was being turned into vital energy and flowed into his body.
In Lu Xuan's body, the vital energy in each cell was used to form the Essence Flower. Meanwhile, spirit qi slowly yet steadily filled the empty cells in his body.
This allowed Lu Xuan to maintain himself at peak condition.
The Essence Flower on his head was growing until it was eventually almost as large as the Auric Flower.
The balance between these two flowers was also quickly established. This time, Lu Xuan was fully prepared thanks to the experience that he accumulated in his past life. That allowed him to finish doing so easily.
Boom!