Although under Fang Yan's immense spiritual sense, Sōsuke Satō was completely unable to harm him, Fang Yan had developed a deep interest in the power of Satō's divine soul.
For a Cultivator, only upon stepping into the Divine Sea Realm can one gather thoughts to form a divine soul.
If one could summon a divine soul to fight alongside oneself, it would be equivalent to doubling one's combat power!
Chapter 447