Searching for Spirits and Reversing the World

In order to avenge the annihilation of his clan, Zhang Chuyi secretly studied the Yin and Yang Sutra and was discovered. After being discovered, he jumped off the cliff and traveled to the Diyi Continent. From then on, he obtained the magical power and relied on the insights from two lifetimes to kill people when people stand in his way, and kill Buddha when he stands in the way of Buddha. But as time went by, Zhang Chuyi discovered that his life was controlled by others. Who is his friend and who is his enemy?