[quote=@Dezuel]
Not sure what kind of maze effect it is. I guess it is magical in origin and appears and feels like the physical thing though? Is it susceptible tp damage? From what I can see of a video it does have like a stone ceiling visually.
[/quote]

It's literally the Labyrinth manifested. It shows up in one of the /GO arcs. You can probably quite happily blow your way out of it if you can get your bearings, but you're probably not going to keep them unless you have a clear path in one go since it was deliberately made to get people hopelessly lost.

In effect, it's only practical to slow people down to get away from something, or so Asterios can get close to you. It's not a terrible threat on its own.