The newly rejuvenated Fallen Sun Guild was the work of one of its former elders. This man was in the Brahma Realm, his power considered weak only when compared to the now-deceased Guild Master. About ten years before the guild began its hostilities with the Myriad Sword Immortal Sect, this elder held significant political power within the guild.
The guild had discovered a secret the sect had been trying to hide, and at that critical moment, they had a decision to make. The elder, known as the Shining Vale Immortal, spoke out against going to war with the sect. His faction backed him, but their influence was ultimately too weak compared to the power the Guild Master held at that time.