Night's Domain is a location in Atelier Rorona: The Alchemist of Arland. This area is unlocked by Sterk when he gives Rorona the details for Assignment 10. Rorona will have to gather certain materials for the assignment and turn them in for completion. Because it is far away from Arland, it will take a whole 8 days to travel to. If Rorona travels to this area with Iksel in the party, the Mystery Mushroom event flag can be triggered. The powerful Demon boss can also be found here, which is required for the Adventurer ending and for the Demon Hunter trophy.