Against Shen Shixi
After he left Shen Xueyi's room, Zhang Fei did not go directly to see Shen Yu, but he went to another area using his invisibility. Before long, he had arrived in front of a room, but he did not find any formation in the room, so he decided to go straight in.
Zhang Fei smiled faintly as he looked at Shen Shixi, who had been deliberately left unconscious for several days, making him completely defenseless. He then touched her chest and removed the effects of his demon pheromone from her body, ensuring that she would no longer behave like a horny beast. Additionally, he implanted his demon slave mark into her soul, but he had no intention of using her as one of his slaves, unlike Qiao Ran and Mei Xiang.
After completing all of that, Zhang Fei sealed Shen Shixi's cultivation right away before waking her up and causing her to quickly open her eyes.