The Great Mystic Saint

[Invincible] [No System]

The humans, demons, and devils wage war, and humanity is defeated.

As he lies at death's door, Zuo Zhiqiu, the foremost of humanity's Ten Celestial Venerables, is sent back by the Valley God Pearl to a time before the demons and devils invaded the human realm.

At this point in time, he should be an embryo, or perhaps not even more than a tadpole.

Yet he remains an adult, and it seems there's another version of himself who has yet to be born...