Mrrnah Hollow is a small valley in the mountain range north of Krizsan. The valley itself is about 22 miles long and is heavily forested with two small lakes. Mrrnah Hollow is one of the few places Sourgrass grows plentifully. Currently the only settlement of note is the town Cavala.
The first settlers of Mrrnah Hollow were a clan of Nephilim who gave the valley its name, mrrnah in the Nephilim language means "Safety". This name had little effect in the following years as the Empire removed the Nephilim one way or another from the valley. In 834 IE the Empire founded the town of Cavala.