Brumestone

Brumestone is a mineral that, when properly enchanted, levitates in the air.

Description
Brumestones are blue crystals. When enchanted, they are capable of levitation, and can carry structures that they are mounted to into the air.

Usage
During the Age of Arcanum, the knowledge of how to enchant brumestone was widespread, allowing it to be created in massive quantities. This abundance was used to create the great flying cities of the era, such as Aeor, Zemniaz, and Kethesk.

Now in the Post Divergence era, that knowledge has been largely lost. Only the Alsfarin Union, based in the city of Ank’Harel knows the process, using the brumestones to create skyships. They keep the enchantments a closely guarded secret. While the Alsfarin Union sells skyships to foreign businesses, they keep absolute control over the skyships' maintenance.

The city of Draconia, a fallen shard of the Arcanum-Age flying city Kethesk, had its brumestones mined to raise the city as an archipelago of flying islands. When the city was destroyed by Vorugal during the Chroma Crisis, the brumestones were again repurposed by the Ravenites building their new city of Xarzith Kitril. There, brumestones are used to hold gondolas aloft that carry goods and people across the city.