Primordial Era: The true lineage of Pangu, which Styx River is this?

Having transmigrated to the primordial world, he became the Styx River and even obtained a Reversal System. However, why was this Reversal System given to the Tongtian Sect Leader, imprisoned in the Zixiao Palace after the Investiture of the Gods? [Ding! Reversal System activated. Please quickly escape the Zixiao Palace and break free from the control of the Fallen Saint Pill.] [Main Quest 1: Compete for the Name of the True Lineage of Pangu] [Main Quest 2: Revitalize the Great Sect] Styx River: "Switch to manual labor? Are these two quests even within my capabilities?" Thus, over countless years, Styx River cultivated good relationships, accumulated merit, and survived the calamity, seeking no fame among the various forces. However, looking at the Three Pure Ones and the Twelve Ancestral Witches glaring angrily at him, as well as Di Jun and Taiyi, Styx River was bewildered. "Fellow Daoists, I truly did not intend to steal your name of the true lineage of Pangu, nor your position as Heavenly Emperor."