Godgrave was a strange land. Although it was vast like a continent, to the point that it was easy to forget its true nature while traversing the vast plains of white bone, the titanic skeleton was just that — the remains of an inconceivable giant.
As such, its topography was strange and alien at times. The same was true to the points where the colossal breastbone connected to the immense collarbones. There was no smooth transition from one to another — instead, the ground simply sloped downward, rolling into a vast and seemingly bottomless chasm.
Of course, it was possible to descend into the darkness, reach the distant bottom, and climb back to the surface on the other side, then completing the crossing. But transporting entire armies in this manner was not feasible… not to mention that the lower part of the chasm was covered in a thick layer of soft ash, and all kinds of horrors could be hiding under its surface.