I've Saved Countless People and Been Rejected. Why Are You Crying If I Turn to a Poisonous Cultivator?

Three hundred years ago, during the battle between immortals and demons, Luo Chen single-handedly saved the entire sect and saved countless lives. However, he also lost all his cultivation and became a useless person. Luo Chen had no regrets and opened a medicinal garden by himself, watering flowers and growing vegetables every day, leisurely. He never thought that it was just because he used some elixirs he grew to make a life-extending pill. The new junior brother reported that he was abusing the sect's resources, which attracted everyone's criticism! The junior sister hates him and says he is useless and his life is a waste of resources. The senior sister scolded him, saying that he would only hide in the rear to save people during the battle, and did not make any achievements. The head master was extremely partial to his junior brother, and ordered Luo Chen to give life-extending pills to his junior brother to improve his cultivation! Luo Chen was disheartened and decided to quit the sect! Unexpectedly, at this moment, the poison repair system suddenly awakened, and Luo Chen realized deeply that studying medicine could not save the world. From then on, there was a peerless Poison Immortal in the world who was decisive in killing and pleased with revenge! … Upon learning that Luo Chen had been expelled from the sect, Demon Lord immediately launched another attack on the entire Immortal Sect. This time, the entire Immortal Sect suffered countless casualties, and the head master was betrayed by his junior brother. Only then did they wake up and cried for Luo Chen to save them. "Ask me to save people? Sorry, I am a poisonous cultivator now and can only kill people!" "How about I give you a pleasure?"