Fire Realm

The Fire Realm, known in Japan as the Plane of Fire, is a realm in the expanded lore of Magical Vacation, created in the illusion of fire. Ignis coins are said to be the main currency of this realm.

Magical Vacation
While not much is known about the Fire Realm, a star in Arko made mention of it, and how they used to be a scholar of magic there before passing away. Additionally, if the protagonist beat the game with darkness as their element, they went on to explore many realms, including the Fire Realm, after graduating from Will-o'-Wisp Academy.