The Under Realm

The huge cave system that exists beneath the Mortal Realm receives it's name due to it's enormous proportions and unique characteristics, with some experts claiming that it is in fact, the 8th realm of existence, but there is a lot of controversy in such discussion. With countless entrances leading into the underground world, the Under Realm is a harsh and unforgiving place, where so many foul creatures and beings can be found, with death awaiting around every turn and corner. Most of the species and creatures that live in it haven't been cataloged, mostly due to the fact that adventurers and explorers not always return from their journeys, and the deeper they go, the worse is their fate.