In the Primordial Era, one may sever the three corpses to achieve sainthood!

Intro: A person in the prehistoric era, orthodox prehistoric era! No system, do not enter if you dislike it! Li Er, from later generations, transmigrated to the prehistoric era, becoming the eldest brother among the Sanqing, Taiqing Laozi! Facing the future strife among his brothers, Li Er felt it was necessary to tell them who the eldest brother was! The Witch-Demon tribulation, and you want to forge the Witch-Slaying Sword? Behold my Taiji Diagram! The Investiture of the Gods tribulation, second brother, third brother, there's nothing that cannot be discussed. Everything depends on Big Brother's arrangements!