The power of karma within Si Ren had been activated by the Living Buddha Delsa.
The original purpose of activating it was to let Si Ren return to the past, using the power of karma to sever everything related to him. This would allow him to completely cut ties and escape the scrutiny of the Heavenly Dao.
Yet the Heavenly Dao seemed to be aware of this, so when Si Ren returned to the past, his connections were not severed. Instead, he formed even more wondrous bonds with Li Wenjing, Qian Rong, and others.
Chapter 1523