Saint Tongtian in the City

In order to prevent the Conferred God, Tongtian was seriously injured by the Four Saints. Unexpectedly, he accidentally traveled to Blue Star. "Where is my magic power?" "Where is the magic power of that saint?" Tongtian discovered that after traveling to Blue Star, he had lost all his magic power and had become just like ordinary people. Fortunately, he could still practice in this world. ... "This... What kind of realm is this." I thought I was a saint back then, but now I have fallen to this state. ... The mountain behind him suddenly spoke: "Master and slave are finally waiting for you, billions of years have passed." Then a piece of clothing, a sword, and a secret book appeared out of thin air. ....... The endless fire of karma, like a blade, burned up the sky, and all souls were extinguished in it, except for me! (No system + No heroine + Humor + Time travel + Immortal cultivation + Please read the text)