Domortis is the Gem Isle, also known as the Mining Isle. It is the southeasternmost island in the Zallaxian Archipelago. Buried in the Marian Sea, it is a common trade port for merchants from every isle, especially the rich aristocrats from Divistial.

Hydrum, the capital of Domortis, is a city of political significance. Situated at the heart of the island, it houses the traditional three-branch government, with a governor leading the island.

On the eastern side of the isle lies Casan, a small but crucial mining town. The mines located in the Wolfrum mountains that run north of Casan to the top of the island are some of the richest and most sophisticated among the island’s quarries.