It was the era when Pangu (the creator god who separated heaven and earth) fell after opening the cosmos. Zhou Yuan was reborn within the Primordial Chaos. He originally intended to quietly secure an identity among the Three Pure Ones (the three highest Taoist deities), but by accident, he seized and merged with the Innate Heavenly Thunder left behind by the Heavenly Tribulation of Cosmos-Opening!​ Thus, there was no longer the Great God Leize in the Primordial Wilderness (Honghuang); instead, an unparalleled Thunder Emperor named Tianyuan emerged!​ On Mount Sumeru, he debated the Dao with Luo Hu (the Ancestor of Demons);​ At the summit of Yujing Mountain, he clashed with Hongjun (the Dao Ancestor, the most revered figure in Primordial Wilderness lore);​ During the hegemony of the Three Clans (Dragon, Phoenix, Qilin), even they had to bow their heads in his presence;​ When the Witch and Demon Clans fought, none dared to set foot in his Thunder Palace;​ He commands countless Heavenly Tribulations, transcends beyond the Heavenly Dao, receives homage from the Four Seas and Eight Deserts, and remains unrivaled across the Nine Heavens and Ten Realms!