Each Fever Wyvern carries a unique and very deadly disease on the spines of its tail. To make up for a lack of physical strength, the dragons use this disease to their advantage by poisoning prey and fending off attackers. The illness will quickly render victims helpless before eventually killing them. A Fever will track its prey until the target can no longer move. Usually a solitary breed, these dragons will only come together during mating season, and will flare out the brightly colored sails along their wings to help attract potential mates. Although it has been observed that the wyverns are nocturnal, they will often pick an open spot of sunshine to curl up in and sleep as the day passes by.

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.

Unconvincing used to live in a little group of nocturnal dragons. He and the other youngsters had a nanny, a sweet sunset whose name he never remembered, so he called her Nanny. The other kids thought he was a weirdo, but the reality is that he was never good at reading situations and didn't realize when he was being callous. One morning, an intruder, possibly just a hungry dragon, entered the territory and found Unconvincing and his nanny dozing. Unconvincing shrieked when he was picked up, and the nanny immediately woke up. She fought and chased the dragon away, but she was struck hard and "decided to have a lie down" after the intruder fled. Unconvincing stood by, repeatedly asking how she felt while awaiting an answer: "Nanny are you okay, so Nanny are you okay, are you okay Nanny, Nanny are you okay, Nanny are you okay..." A healer was at the scene a while later and helped her, no thanks to Unconvincing. He was ousted from the group that day, for reasons he still doesn't understand.