Ok, my final interpretation of the Harley bible:
- there was the god of earth in the first world (and he was a god, so it's not Imu) and the df user who possess the god of earth df, and thats Imu.
- Imu is from void century, he is the one of those who slayed the sun and became a god
- the serpent is red line who destroyed the first world. People from the first world run to the moon and lived there for a long time.
- the fragmented moon is Teach and the trembled shadow (Imu) will listen him