The Nosdu Mountains are a mountain range that Spiritia Rosenberg visits in her quest to stop RKS' rebellion against the Holy Empire from breaking out. They are the setting for Zorne's stage. The mountains are where Spiritia meets up with and fights Zorne to get her to calm down and listen to reason from her. Grolla also visits the mountains to get Zorne to stop her own coup. The mountains take the player character across rocky plateaus and through the mountain range's lava-filled mine shafts.