Speaking of Shen and Mu, perhaps they really are a pair of natural-born foes who take joy in their enmity, competing with each other in every aspect, from cultivation and combat power to the speed of their spiritual practice and the grade of their bloodline.
Li Zhirui was happy to see this, for they were constantly putting pressure on each other and thus accelerating their own cultivation speed.
Therefore, after arriving in the Primal Spirit Realm many years ago, they rarely showed themselves because they were engrossed in arduous cultivation!
Shen, having the advantage of starting his cultivation earlier, still managed to outpace Mu by a good margin, which naturally left Mu far from satisfied.
And Shen, in order not to be surpassed by Mu and live a life of misery, dared not slacken in the slightest, to the point where his cherished goal of cultivating his own kind was cast aside.