The primary reason Zhou Xun chose to leave Tianfu Island was that he had received a letter from True Monarch Tianci regarding the exchange of those Tier 4 Mid-Grade spiritual herbs or higher.
One must realize that it had been over a dozen years since he last refined spiritual plants to enhance his spiritual root aptitude. Moreover, the demon shark and the Black Flood Dragon Emperor he had killed were both transformed high-level demons. According to the exchange list published by Zhenhai Immortal City, their remains were sufficient to trade for two Tier 4 Mid-Grade spiritual herbs. For Zhou Xun, that meant a two-point increase in his spiritual root aptitude! At his current level, every single point gained in spiritual root aptitude would bring enormous benefits to his future, so Zhou Xun naturally could not let this opportunity slip by.
Upon hearing this, True Monarch Tianci let out a hearty laugh.
Chapter 589