Fellbottom

In the north of the mainland, east of the Frostlands, is a region of sunken land separated by the rest of the mainland by a massive chasm. Legends have it that the region was once home to an academy of mages who came out into the frozen wastes to practice forbidden magic. Their experiments went awry and they ended up sinking the land and flooding it with demonic power.

Now the land is home to creatures twisted by that power and worshipers of the Evil Gods. It is separated enough from the mainland that most aren't bothered by it, though Paladin Orders launch the occasional crusade to try and cleanse the land.