Swallowtail Dragons are graceful and quick flyers, much like their namesake bird. They are capable of precise aerial acrobatics, and can reach very high altitudes. Because of this, humans observing these dragons are often astonished at how large they are when confronted up close. A Swallowtail’s diet consists of insects and small mammals plentiful in temperate forests. These dragons are also made remarkable by their paper-thin wing membranes, which allow light to pass through, creating an astonishing effect on starry nights.

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.

Nightmare Swift was named for a fabled maneuver, in which he was said to have outpaced a bolt of wayward lightning in a ferocious storm. The feral light shone through his wings, giving him a frightful silhouette, almost as that of a daemon's. He is a dignified, noble beast, as well as the only male to ever best Silver Starlit Umbra in a competition of flight. The pair race regularly, seeing who can best the other. So far the wins have been half-half, as Umbra is unmatched in her maneuverability, but Swift is far more graceful.