Brumestone

Brumestone is a mineral that, when properly enchanted, can be controlled as it levitates in the air.[1] The arcane magical input allows control of the level of buoyancy.[2] When the input of arcane magic is withdrawn, the brumestone naturally remains hovering in place, although any weight placed upon it will cause it to gradually sink.  

Description

Brumestone is a bluish stone or mineral that a very basic, simple enchantment can cause to lift. It is then capable of levitation, and can carry structures to which it is mounted to rise into the air. A skyship is typically mounted with three large brumestones, which allow it to carry up to ten tons of cargo while still maintaining flight.  

Usage

During the Age of Arcanum in Exandria, 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: Aeor, Zemniaz, and Kethesk. Only a handful of cities were so elevated. Caleb Widogast's understanding was that those three had cornered the market on brumestone and therefore could afford to hold their entire cities aloft. However, another city, Avalir, had been built on a mountain loaded with veins of brumestone and the mage Imyr Por'co was thus able to lift the city to the sky.   In that age, brumestone was not exclusively used to make cities fly. Aeor also had a form of elevator called "brume lifts", suggesting that they were likely powered using brumestones. Imyr Por'co's granddaughter, Patia Por'co, had a rigid golden ring that floated and rotated around her neck using tiny brumestone crystals. And in addition to flying cities, there were skyships in that era.    In the Post-Divergence era, that knowledge has been largely lost. Until recently, only the Alsfarin Union, based in the city of Ank'Harel, knew the process, using the brumestones to create skyships.They kept the enchantments a closely guarded secret. While the Alsfarin Union sold skyships to foreign businesses, they kept absolute control over the skyships' maintenance. However, during the War of Ash and Light in Wildemount, the city of Hupperdook created small mobile skyships for use by the Dwendalian Empire.   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 to build their new city of Xarzith Kitril. There, brumestones are used to hold gondolas aloft that carry goods and people across the city.    In 843 PD, the party that would later be known as Bells Hells discovered grains of brumestone in crates while investigating possible thievery at Prudaj Textiles for Lord Ariks Eshteross. The smuggled brumestone was used to create five crude devices that allowed the Shade Mother to fly.