Considering that high-grade cultivation techniques are quite troublesome to cultivate, and also consume a lot of experience points, Lu Yu chose a fourth-grade Spiritual-level non-attribute cultivation technique as his technique for further enhancing his realm.
As for advancing the realm by increasing the tier of the Bing Huo Qi Zhong Tian, it's likely that only during a major breakthrough, there is hope to advance once. After all, the cultivation process of Bing Huo Qi Zhong Tian is too complex, and the consumption of experience points is also very high.
Up until now, Lu Yu has not yet completed the cultivation of the second tier and is waiting to return to Beifeng City, to Luoyan Valley in the Qingyan Mountains to absorb the Celestial Falling Bright Flame, and to Yinming Cold Pool in Kugu Ridge to absorb the Yinming Cold Qi to complete the remaining 30% of the Body Refinement progress.
