The power of Sword Soul was the third realm when it came to to sword techniques. The number of swordsmen that could comprehend it were few and far between. Not only did one need extraordinary perception, one also needed critical encounters. There were even a few of the ten Sword Masters in the world who still had not comprehended the power of Sword Soul. That was a power that far exceeded the power of Sword Truth, and obviously was not something rookies like them could possess. Even Sword Immortal Xu Taibai only managed to comprehend the power of Sword Soul at the age of thirty. He was one of the youngest people in history to have attained that achievement.
However, the Hero King had far exceeded that record to be able to comprehend the power of Sword Soul at such a young age.
