No matter how powerful, no matter how many dominator ranks there, they still couldn’t enter spirit dominator rank. This problem disturbed Chu Mu for a very long time.

In the past, every rank had a barrier to overcome. If a spirit master wanted to become a spirit emperor, the bottleneck made it seem impossible for many people. However, as long as one’s soul pets could reach a certain level, added with personal power, the cage could be overcome.

Yet, with spirit dominator rank, human history had shown that no matter how powerful one’s soul pet got, no matter how hard one trained, no one had a chance of getting over this barrier. It was just like a natural restriction.

Before Old Li spoke, both Old Han and Chu Mu understood the concept of species restriction.

Yet, when he categorized humans as soul pets, Chu Mu and Old Han both remembered the situation seemed to be very similar with humans for species restriction!

Warrior ranks could not step into...