Everlasting Embers

Others cultivate immortality by seizing creation from heaven and earth, but Gu Changjin cultivates immortality by borrowing things from a dead era - borrowing a sword, a name, a piece of civilization that was scrapped away by the law of heaven; every time he borrows it, he adds a debt to his life. If the debt is not repaid, the immortal will not become a god, and he will become a desolate person first.