Lin Fei was certainly no stranger to the four characters "soul fusion".
Back when his master Cang Kongkong discovered that Chen Shiyao was a rare human possessing the Tianshang Primordial Soul, she had instructed Lin Fei to find a way to achieve soul fusion with her, thereby extracting her Tianshang Primordial Soul energy.
However, during the days Lin Fei and Chen Shiyao spent together, they never happened to find the opportunity to achieve soul fusion.
Chapter 1226