Because the "Earth Spirit Tao Record" itself has several flaws that cannot be ignored!
First, the Spirit Seed required for the integration of the cultivation technique is fixed in place once a land of fortune opens, or even when ascending to a Cave Heaven. That is to say, to benefit from the enhancement of the technique, you can only stay within Mount Wanxian.
But that's highly impractical!
Not everyone has the unwavering mental state and Dao Heart like Da Qing; most of the clan members need to go through trials to improve themselves, a problem that even Li Zhirui cannot avoid.
As a result, their desire to increase their strength is often not achievable, and it's even less effective compared to the "Wanling Sutra" since Contracted Spirit Beasts can follow one around and also enhance one's own strength.
Second, the "Earth Spirit Tao Record" requires a higher aptitude!
