Erna
The planet upon which the entirety of the series takes place, it is the only habitable planet that a landing crew from Earth found in their many centuries of searching. The terrain of Erna is, for the most part, much like Earth. The primary difference is Erna's severe seismic activity; earthquakes, large or small, are a common phenomenon on virtually every corner of the planet. An energy field called the Fae envelops and wraps every inch of Erna (see more in the Fae section below).
Read more about this topic: Coldfire Trilogy