I Slay the Heavens with My Magic Sword. Who Dares to Call Himself an Immortal?

[No system + fast pace + multiple female protagonists + invincible in the same situation + darkening + cool writing] Heaven and earth are unkind and regard all living beings as stupid dogs; Dao is unkind and regard all living beings as humble slaves. On that day, he was willing to give up all his cultivation, seek help from all the Buddhas in the sky, and be willing to live an ordinary life. The Buddhas are silent, the Great Way has departed, the heavenly way does not allow his existence, and the Buddhas are uneasy. At this point, all the Buddhas appeared in the sky, the universe collapsed, and space and time were chaotic. With one man and one sword, the young man traveled all over the world, just looking for that glimmer of light. Since the Buddhas are unkind and the Great Dao is unfair, I will kill with my sword anyone in the heavens who dares to call himself an immortal.