Brimstone Dragons live in dry arid areas such as deserts where they feed mainly on sheep, goats and the occasional camel. Their favorite habitat is ideally situated close to the wastelands around active volcanoes. This is due to an important part of their diet—sulfur, which they obtain from deposits near volcanic gas vents. Instead of fire, these dragons use the sulfur they ingest to create a noxious gas which they store in their large throat pouches. When in danger, this gas is released in a large cloud. They also eat other mineral rich substances—including charcoal—and will drink the mineral rich (but slightly acidic) water commonly found in deserts and volcanic regions.

Dragons are highly-intelligent reptilian creatures that—from a human perspective, at least—appear to live forever. Many different varieties of dragon exist, each with their own unique qualities, habitats, and behavior. Adolescence in dragons is usually marked by the growth of a hatchling’s wings, although not all breeds of dragons grow wings and some breeds have other traits that indicate the beginning of maturation. In Galsreim, dragons and humans coexist peacefully.

Ebil's alias is Zolfamaryu. He thinks it's more dignified than his scroll name. Zolfamaryu steals souls. He tricks other dragons by offering them fame or fortune, usually in the form of a sub-regency within his kingdom. Once the other dragon has accepted his offering, he reveals the fine print in the contract, the fine print that not only binds the dragon's body, but also its soul. He then forces the dragon to work day and night without rest producing ever more from the workers within whichever realm is now their jurisdiction. Eventually, the dragon gives up and either retreats sobbing into the corner of a nearby cave or simply dies. Zolfamaryu insists, though, that death does not nullify the contract, that the dragon's soul is still his.

Most of the hatchlings, understandably, are scared of him.