"Well, I got to know some information when I tried to read the minds of those Abyss humans. As you know, it is pretty hard to read their minds, but I still tried to do that.
Even though I did not get that much information, I got to know something about that Abyss world.
Even though we call that dimension a world, it actually is a closed dimension. This is not a planet or anything like that.
It is just like a closed dimension. The creator of this dimension is one of the demons who got sealed by us.
The whole place is filled with dark energy. This also creates the Abyss humans. If I am not wrong, they also have a strong hold in that place.
Another thing is that even if we killed all the Abyss humans, there would be more Abyss humans once again appearing in the place. It was like those Monsters, those Abyss humans would be able to respawn.
