I'm not sure. If I were going to speculate- I suspect that the plutonium was probably mined from this place by the original inhabitants. Which doesn't necessarily mean that it didn't attract the monsters. After all, we can confirm that only one of original residents remain, and that the pervasive darkness came.
Perhaps the darkness is a kind of veil. The way curtains block out the light.
Someone or something cast it around us to hide this world from the eaters. If that's the case, that's someone or something who understands what's pursuing us.
Though again, this is only speculation. I realize it runs counter to the theory you suggested, that the World Eaters are responsible for the darkness in this place.
As an aside, have you or any of the others you were with ever located a mine in the area?
not sure if that means love it or """"love it"""""
Perhaps the darkness is a kind of veil. The way curtains block out the light.
Someone or something cast it around us to hide this world from the eaters. If that's the case, that's someone or something who understands what's pursuing us.
Though again, this is only speculation. I realize it runs counter to the theory you suggested, that the World Eaters are responsible for the darkness in this place.
As an aside, have you or any of the others you were with ever located a mine in the area?