Horse Dragons have equine-shaped bodies and hooves instead of claws, which allow them to be fast runners. They specialize in running takeoffs, which are quicker than taking off from a stand-still. Horse dragons are able to stalk their prey from the ground then quickly execute an aerial attack for the kill.

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.

Euos lives for the speed; no matter when or where, he prefers running over walking and always gives his best in everything, hunting and bringing the prey back to the cave in record time. However, that's precisely why he isn't suited for certain tasks. The first time he was asked to take care of the hatchlings, the first thing he did was challenging them to a race around the forest. Of course, he ran at top speed without waiting for them, thus obtaining the record of shortest time to lose them all. Luckily, all hatchlings were found playing in a pond nearby. Euos hasn't been asked to take care of them again yet.