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.

Frevelon, as a Fever Wyvern, was immediately drafted into the ranks of assassins by Cliscintiom. He has voiced his displeasure at such specie profiling, but the complaints were never acknowledged by any of the higher-ups. He holds no small amount of resentment over such bias, and has begun threatening the Beta with death unless she changes him to his desired standing as a fore-runner in the army. He has created a deadline of the shortest day of the year; if his request is not met, Cliscintiom WILL join the spirits in the Perfect Land.