The Perils of Chaos
Ah, the fabled “Under-Empire” of the mythical Skaven. Some people have said it exists. One renowned Professor Andreas Cameras of the University of Altdorf gave public speeches about this case before he died suddenly of Yellow Fever.
It was said that the Skaven race built tunnels all along the World’s Edge Mountains, and even into the Empire during the last thousand years. However, not much is known what lies underneath the Earth, and I, for one, don’t think many people care.