North Pass Marsh area.
This land is surrounded by two mountains, and behind the pass is a plain area close to the wetlands. The Spirit Vein is relatively stable and gentle here. It was once a breeding and resting place for a large number of aquatic Monsters and Demon Monsters that inhabited the mountains.
Since the pioneering war forty-two years ago, a large number of dangerous large-scale aquatic Monsters in the wetlands have been eradicated. However, an attempt to conquer the mountain Demons was met with a surrounding encirclement by Monster communities and failed, resulting in the complete destruction of the habitats around the wetlands. The fortresses in the mountains have also become lairs for the newly bred Demon Monsters.
