In the course of their cultivation, Soul Masters had a very common weakness: their shortcomings in spiritual power.
Although absorbing Soul Rings did involve requirements in spiritual power, unless a Soul Master's Martial Soul possessed spiritual attributes, or they had carried out specialized research or encountered some opportunity, most Soul Masters, including Titled Douluo, had an exceptionally shallow understanding of spiritual power.
There were mainly only two ways to improve spiritual power. One was to absorb a head Soul Bone, and the other was to let it grow naturally as one's strength increased.
Because of this, Huo Yuhao's Mental Detection in the original work was effective everywhere, and Mental Sharing became a divine skill.
Even a Limit Douluo like Long Xiaoyao could only faintly sense the probing of spiritual power.
The reason Mu En could display such powerful spiritual power in the original work was entirely because problems had appeared in his body, leaving him unable to cultivate his body and Soul Power, so he began studying spiritual power instead, and even then, he relied on the power of the Golden Ancient Tree. It was a choice made out of helplessness.
During this period on the Douluo Continent, there was not even a grading system for spiritual power, let alone active cultivation of it.
Traditional Soul Masters were like this, but the Body Soul Masters of the Body Sect, the Soul Engineers of the Sun Moon Empire, and the Evil Soul Masters of the Holy Spirit Cult had all carried out research into spiritual power.
Body Soul Masters had combat techniques that required the use of spiritual power. Soul Engineers also trained their spiritual power when crafting Soul Tools. Evil Soul Masters were also experts at toying with souls and minds.
The traditional Soul Masters who could not keep up