Passerby a Decides to Practice Hehuan Kung Fu

[Not sure if it's 1v1 or multiple male protagonists, please collect with caution] I will never forget that day in my life. That day, my kind and cowardly adopted brother went crazy and killed everyone who had bullied him with a sinister smile. Blood splattered three feet away. The semi-literate Xiaobai next door suddenly became particularly serious: "Today I will do justice for heaven, kill the evil devil like you, and bring peace to the world!" The little blind man who often helped me feed the geese actually opened his eyes. His golden eyes shone brightly, and "whoosh" turned into a sword. And I was holding the goose and the dog, and watched helplessly as my home of more than ten years was destroyed in the light of swords, leaving me alone in a mess. "..." Seriously, who are these inexplicable people? I didn't regain my memory until I was taken to the Demon Realm. It turns out that I was dressed as a passerby in a novel, and the people around me were either villains or protagonists. Passerby A, if you are lucky, you will be the background tool person. If you are not lucky, you will be the unlucky guy who will be crushed by the protagonist group and the villain group in turn. I have always thought so. Until one day, I picked up a book with four shining golden characters written on it—— "Hehuan Gongfa" I remembered that after my adopted brother revealed his identity as the Great Protector of the Demon Realm, he once said to me with a smile: "You are not good enough to be an immortal. You are not cruel, and you cannot be a devil. This has been the case in this life." Xiaobai next door, who calls himself Taojun, is also convinced: "There is no skill in the world that you can practice. You and I are different from immortals to mortals, and we have countless friendships in the past." With the thought of not steaming the steamed buns to save my breath, I opened the book. I originally thought I could slap the villain in the face, but after learning that I could practice, they all had the same focus—— "Hehuan Kung Fu... It seems that I should congratulate you." "So, who is it?" "Who helped you test this technique?" Intention: There must be a road before the car reaches the mountain