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.

Pisgahplume lives in the crater of a dormant desert volcano. Usually he is undisturbed as he hunts wildlife in the vicinity. Once he was startled by a pack of coyotes trying to nip his tail, and let out a noxious cloud of gas at them before rending them to pieces. This caused quite a stir when observers in the countryside below thought the cloud meant the volcano was going to erupt. He was grateful when the news spread that the volcano was dormant after all and the commotion died down.

Since then, Pisgahplume keeps a pile of rubbish stored in the crater that he can set on fire if he inadvertently emits another plume. He hopes it will allay any fears of eruption much more quickly and prevent "too close" an investigation of his home.