Perhaps among the most venerated of dragon breeds is the Zyumorph, a breed whose selfless heroism and strong moral compass are nearly unparalleled by other dragons. Zyumorphs have an innate urge to fend off wrongdoing, and as such, are often sought after in times of peril. Although they are independently quite capable fighters, it is said that their true might is not unlocked until all six Zyumorphs are brought together in times of great duress.

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.

Kerbren realized early on that, as sixth of her color in a family where summoning went by birth order, she would be waiting a long time for her sinomorph. Figuring that she might as well have an interesting life while she waited, she gathered the seventhborn and eighthborn blue zyumorphs and set off to find adventure. The three of them eventually founded the Scourgekeeper Redemption Squad, a collection of dragons seeking to tame the scourgekeeper menace one redemption at a time. As the eldest of the three, Kerbren has appointed herself organizer and general coordinator. She always knows which adventurer has gone where and how long they've been gone, as well as how many journeys it took for each to successfully redeem a scourgekeeper. Kerbren has also started to research new occupations for retired adventurers.