Lin Mu raised his brows at what Wu Hei had done and this was a new method of using spirit sense that he had seen. He wondered if he could use it too.
"You can also do it rather easily, but it will only work on cultivators that are much weaker than you or the ones that have a frail mentality. Those with a stronger will not be affected by the pressure of spirit sense." Xukong advised.
"Oh… I understand senior." Lin Mu replied in his mind.
"Though, this is kind of obsolete for you. The Nine Divine heart sutras that you have are much better at mental disturbances and stronger to affect too. You may as well practice them more." Xukong added.
Lin Mu then realized that what Senior Xukong was telling was quite right. The effect that Wu Hei's spirit sense had shown was basically a lower version of his severing heart sutra. The spirit sense was only able to momentarily make them lose their focus and disturb them, but his severing heart sutra could fully send them in a daze.