Kong Yu could currently only perform about five or six Great Dao Techniques, and this is referring to simultaneously executing them. If given enough time and Soul Power, Kong Yu would naturally be able to perform all Three Thousand Great Dao Techniques. However, if executed simultaneously, he could only perform five or six. Not only would performing these techniques completely deplete his Soul Power, but the physical strain from channeling the power of the Heaven and Earth Dao would also be too much for Kong Yu's body to bear, potentially causing it to collapse. Therefore, it was necessary to use them cautiously.
