Bab 430: 9.49 Second Blue Star - (Past) His First Farewell.

The heaven and earth turned to black as the darkness swallowed anything in the world of Inferno. The sky within this world was devoid of light and only darkness is present at this moment.

The Ye Guis had long known about the powers of their creator. This total darkness is the domain of the God of Void. The abyss is his power himself. No one knew how to live in darkness as they had forgotten about this feeling after they were born.

As a baby, before coming out into the world they only knew about darkness. They cannot open their eyes inside their mother's womb and their world is filled with water. But in that place, they had lived for 10 months and one could say that humans had lived in pure darkness in those 10 months.