 Three hundred years ago a colony of duergar settled nearby and became guardians of the corrupted area.Decades ago, the evil conjurer Madreus bypassed the duergar and gained mastery of the Far Realm creatures residing in the complex underneath Firestorm Peak.In the last five years, he gained control of the duergar, and his studies and experiments have begun to cause manifestations of warped behavior in nature and society to spread beyond the legendary mountain.