As the disciple of Yu Youyong, besides the Qingcheng Refining Qi Formula, he had practiced another technique.
This technique offered few additional attributes for each level and only granted a derived spell every ten levels, but it had an unignorable role - after reaching the level of perfection, one could sacrifice some levels of this technique to instantly restore all treasures of the Qingcheng lineage.
Restoring the Light Mirror Magic Treasure just now had caused this technique to drop from the twentieth level to the seventeenth.
To re-cultivate these three levels wouldn't be simpler than cultivating the Qingcheng Refining Qi Formula from the seventeenth to the twentieth level, and the experience required was almost the same.
That's why he showed a bitter smile, as he had paid such a huge price and still wasn't sure if he could win.
