In a world where the gods have walked the ground in the past few decades, being an atheist is a crime against sanity.
The wall makes perfect sense in DnD terms. And I think the game put in a very good explanation for it's purpose. Beyond what I had ever presumed before. Before, I had presumed the gods were just jerks, as gods are known to be. Now, not only are they jerks, but they're also bastards.
Edit: I just read that Myrkul inhabits the Crown of Horns. O_o