I tried closing my eyes to see if I could cross the world's wall and sense the void beyond.
"The world's wall" is not something I encountered for the first time. Back in the now utterly destroyed Southern City, I had experienced the "Outer World Wall" summoned by the "Paradise."
However, to be precise, compared to the "Outer World Wall" formed as a self-defense mechanism by the yet-to-fully-arrive "Paradise," a genuine cosmic barrier is vastly different. For one, such a "wall" doesn't simply appear in some physical space. The boundary between the world and the void isn't something so straightforward.