The region shrouded by the Angel-Level Relic "Dark Realm" didn't merely cause people to fall into slumber and be forgotten. This darkness was trying to dissolve and devour everything around it until all tangible and intangible things became part of the darkness.
As a result, the Earth turned black; the shapes of trees and wild grass became even more bizarre and twisted, and everything seemed to possess the ability to absorb light. Even space itself was affected by the all-encompassing darkness, and began to distort.
It was as if parts of space had been eroded by the darkness, resulting in some locations being connected with distant, incoherent places. One misstep could leave someone clueless as to where they had ended up.
This chaos didn't occur on a large scale; space as a whole was still normal. Shard had also come close to misstepping when, thanks to his Core Spirit Rune "Space-Time," he became wary.