The void was how we perceived the place behind the curtain of reality. It neighboured every realm of existence no matter where or how far. Everything from the beginning of time to its dreadful end existed in unison behind the curtain.
To catch a glimpse of what lay behind was akin to ask to understand all of existence...all at once.
Hao Xuan had studied the void as a normal human in one of his previous lives. Many considered it to be the emptiness of deep space but it was so much more.
What lay behind the curtain was a 26th-dimensional plane that was impossible to comprehend for physical beings like him and yet, everything they did had an effect in the shape of an echo not only in there but also in the void as a consequence.
Gods, Demons, and other powerful beings that one could think of, they were able to exist in several dimensions at once and could read, understand, and even manipulate it by peering behind the curtain through the vastness of the void.