Superpower Users, despite having many different subtypes such as those with special superpowers, essentially adhere to the Five Elements; everything in the universe is inseparable from them. Therein lies the principle that everything changes without straying from the root source, which is this very logic.
When Ye Tianchen withstood the two Illusion Dragons unleashed by the Seven Stars Saber and eventually dispersed them using his Water Element Superpower Skill unscathed, not only was Lin Duan stunned, but so was Qin Yaoyue who had been standing atop the archaeology department's building the whole time, closely watching Ye Tianchen.