Even Though I Have Top-Notch Combat Power, I Can Still Be a Good Person

The protagonist Hu Qi experienced the destruction of the earth and the disappearance of his family. He and his daughter experienced 300 springs, summers, autumns and winters together, and finally gained the ability to use any power, items and knowledge in his mind. But the limit is that one day it can be used and the other day it cannot be used. One day it is the invincible Hu Qi, and the other day it is an ordinary person Hu Qi. How should he use his wisdom to survive in this world and this universe? Are the 300 lives he and his daughter have experienced really happened? What has his daughter experienced?