From the "Paragon of the Orthodox Path" senior brother to the "Lord of Ten Thousand Demons," this is not a simple fall from grace, but a complete rejection and reconstruction of the belief system he once held.
The protagonist's power system, the "Karmic Codex," is essentially the highest-level "intelligence cheat." He no longer relies on brute force, but wins through planning, calculation, and the rules themselves. The incorporation of modern elements such as business warfare and political intrigue elevates combat from the "physical" dimension to the dimension of "laws."