Demon Slayer: Worshiped as a God by the Demon Slayer Squad

It is one of the most nearly perfect works that was personally transformed by Muzan Kibutsuji before the advent of Kokuenichi during the Warring States Period. He even fought alongside the young Black Death Mou. But in a battle, you were injured by Enichi Tsukuni's sword, not because of the Nichirin Sword, but because of the "spiritual power" contained in his sword energy that caused your time traveler soul to reject this ghost body, and fell into a sleep that lasted hundreds of years.