After Killing the Wrong Male Protagonist

(Third person in the text - Lu. There is a male second version) I have been frail and sick since I was a child, and my life is not long. The system said that all the luck can be taken away from the male protagonist only by draining his blood on his eighteenth birthday. So I kept the young male protagonist close to me and became the person closest to him. I didn't like his practice. I said he was afraid of the differences between immortals and mortals, so could he wait until I died before practicing? Sure enough, he no longer practices in front of me. I said that I was a doctor for incurable diseases, and I just hoped that he could spend the rest of my days with me. As expected, he never left. I didn't allow him to grow and removed all his fangs. On his eighteenth birthday, Shunli drained his blood and took away his luck. But since his death, although my body has become much healthier, I always feel that my whole body is filled with coldness, and I still don't live long. [Sorry host, we killed the wrong male protagonist. You killed the villain - Lu Jingxue! He was originally...] The sights everywhere, the breath close at hand, people around him began to die mysteriously, everything pointed to his revenge. - Lu Jingxue was born evil, indulgent in bloodlust, and born to destroy everything. He had wanted to kill Luo Yuqing many times, but he was intoxicated by her "Axue". In order not to scare her, he suppressed his demonic nature and secretly searched for a life-extending elixir for her... In fact, that day was not his birthday at all, and the drug had no effect on him. He looked at her, slicing open his own flesh, without struggling, and just wanted to ask, why? It's a pity that I don't have an answer until my death. So he used his soul to seize everyone around her, trying to find out the reason for her betrayal. After seeing her show a familiar smile to the current leader of the Immortal Sect, and after learning that the leader of the Immortal Sect's birthday was that day... He finally couldn't help but locked her up, hid her in a tent, changed her appearance, and asked her over and over again: "Do you know the difference between me and him now?" Intention: to be added