The Cruel Debt of Life

The Trikaya Sutra, number one of the Relics of Creation, ranking right above the Eye of Fatian. 

Unlike the other Relics of Creation which played the role of overpowered artifacts, the Trikaya Sutra was simply a cultivation method—presumably the number one cultivation method in the omniverse. 

And unlike what the experts of the Three Realms believed, Yuanqi didn't create it. He in fact had nothing to do with the existence of the Relics of Creation. 

Thanks to Yue Tianye and the Wailing Thearchs, Huan Yi learned in ancient times that all Relics of Creations came from outside the Three Realms—belonging to the now-deceased expert once hailed as the Most Exalted One.