The Useless Old Man from the Demon Sect Was Refined into a Peerless Medicine by His Senior Sister

Chen Shi, an 80-year-old man who had lived a peaceful life in a small village, was on the brink of death. However, he was discovered by the disciples of the Red Phoenix Sect, Fei'er and Shuang'er, who believed him to be a rare and valuable "Pure Yang Body". They took him away to be used as a medicinal ingredient. After three days and nights, Chen Shi was reduced to a shadow of his former self. Just as he thought he would meet his end at the hands of these two sisters, a mysterious phenomenon occurred - the Yang-Yin Mirror awakened within him. This ancient artifact, once discarded and broken, now possessed the power to transform waste into treasure and decay into wonder. However, the Yang-Yin Mirror required a crucial element to function - the dual cultivation of the user. Moreover, the mirror came with two extraordinary abilities. The first, the "Emotional Entrapment" technique, allowed the user to increase the affection level of their partner, causing them to become completely submissive. The second, the "Heart Spirit Technique", allowed the user to touch their partner's body and reveal their deepest fears and inner demons. As Chen Shi explored the hearts of his captors, he discovered their darkest secrets. Fei'er, one of the sisters, was tormented by the fear of failure, and the prospect of becoming a mere cooking pot for the sect's internal disciples if she didn't break through to the foundation stage within a month. Shuang'er, on the other hand, was driven by a desire to protect her sister, despite her cold and emotionless exterior. The two sisters, along with Fei'er's and Shuang'er's friends, Red Yù and Su Mùyún, all had their own dark secrets and inner demons. As Chen Shi delved deeper into their hearts, he discovered the true extent of their psychological trauma. With the Yang-Yin Mirror's abilities, Chen Shi was able to manipulate the emotions and inner demons of his captors, one by one. He now held the key to their salvation - or their downfall. Would he choose to help them break through their bottlenecks, repair their meridians, and suppress their inner demons? Or would he use his newfound power to manipulate and control them? Chen Shi's response was simple - "Sorry, but I need you to cultivate with me first!" He demanded that they engage in dual cultivation with him, and in return, he would help them overcome their psychological traumas and achieve their goals.