The Borderlands are what separates the Midlands from the Elemental Barriers, beyond which lays, if tales are true, the Abyss. They are much bigger than the Midlands and are populated with a great variety of species, many of them only vaguely humanoid in nature.
In ancient times, the Borderlands were divided by the two Archmages and each of them was given to a Dinagul, a ‘God bound to one place’. In exchange, the Dinagul would protect the world and keep out Demonic invasions. The pact between humans and Dinagul didn’t last lang, though, and now the Borderlands are an even more dangerous place then ever before.
When travelling through the Borderlands, you should expect to encounter the offspring of both Demons and Dinagul, as well as a great number of other monstruous creatures.