Naruto/Reverend Insanity Crossover: 血鸦仙 — Blood Crow Immortal

I use AI to proofread, rewrite otherwise clunky dialogue and conduct research. That's All. What is a demon?Is it one who kills without hesitation? Then all cultivators are demons. Is it one who sacrifices others for gain? Then all of humanity stands guilty. Is it one whom heaven itself has forsaken? Then perhaps demons are the only honest beings beneath the sky.Fang Yuan lived five hundred years. He schemed, betrayed, slaughtered, and refined. He devoured sects and toppled immortals. He became the demon that all the world feared—and in the end, he failed. So he turned back the river of time itself, returning to the beginning—to Qing Mao Mountain, to the clan that had wronged him, to the body of a fifteen-year-old with an empty aperture and a useless brother.He was ready to begin again.But fate, it seems, had other arrangements.​ Uchiha Itachi killed his clan at thirteen. Not for power. Not for eternal life. Not for any benefit that the Gu World would recognise as sane. He did it for peace. He did it for a village that would curse his name. He did it for a brother who would one day drive a hand through his chest.He was a genius. He was a murderer...A fool.A saint.He died of illness at twenty-one, having never once defended himself against the hatred he had cultivated.He died again, resurrected as a weapon, and used his borrowed life to undo the mistakes of madmen.He died a final time with a smile, thinking: finally, rest.​ He was wrong.​ The man who wakes in Fang Zheng's body remembers everything. The weight of a blade through his parents. The light fading from his lover's eyes. The crows that followed him through a lifetime of slaughter and sorrow.Now he wakes in a body not his own to a "brother" not his own, whose eyes hold five centuries of indifference and cold ambition.In this world, the heavens are blind, the righteous are fools, and only the ruthless survive.But what happens when a man who already accepted death meets a man who will never accept it?血鸦仙 — Blood Crow ImmortalCommissioned and Directed by Robotkillerx