The heart of a demon never has regret even in death is part of Reverend Insanity's narrated chapter feed on Arcwave. The first narrated chapters are free to sample. Later chapters may require sign-in.
Demons are unrestrained by morals; immortals are fettered by humanity. Fang Yuan, betrayed and executed by the cultivation world he was about to dominate, wakes up five hundred years younger with every memory of his enemies, his allies and the Gu they used to break him. This time he intends to walk the demonic path on his own terms — and the cost will be everyone foolish enough to stand in his way.
