Please Kill the Immortal

Reborn in an unknown dynasty, he was burdened with a blood feud at the beginning. As a top medical student, Zhang Yuanan has determined to become a swordsman in his life. I have a sword that can kill immortals, destroy demons, subjugate demons, and get rid of ghosts. What is a ghost building? I don't know, it definitely has nothing to do with me. It is even more impossible to be an evil sect. As a human being, you must live an upright life. So theoretically there should be no evil sects. All righteous masters, please be patient. I'm a good person.