From the results of his test with Xue Jianfeng, the soul evoking hands and feet could take down any opponent under the original level. The price Lin Yi had to pay was nothing more than some spirit energy. As long as he had time to recover after the process, he could completely recover with the help of the spirit grass. In fact, if he wanted to, he could even skip the process of recovery because he could just devour his spirit!
Unlike the soul-snatching hand, the primordial spirit could directly use the other party as its own tonic. After devouring, not only would it not consume its own spiritual energy, but it could also grow by a large amount. This was also the root of the nine neonate's joy.
However, Lin Yi wasn't used to this method. First, he felt that it was too inhumane, like an uncivilized beast. Second, he felt that there were too many hidden dangers.
Methods that were too fast usually had many hidden dangers.