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.

He was the first dragon in his cave to mature, which means he had no adult role models to look up to or imitate. That's why he seems exceptionally wild and aggressive; he simply doesn't know how much is enough and never learned the concept of "too much". As he had no one to protect him when he was small, he had to become very fast, and now that he is grown up people warn their children of the "Deathbringer From The Sky" who will get you if you don't eat your soup (this is a lie) and when you hear the swoosh of his wings it will be the last thing you hear (this is probably true, though no one who heard it survived to confirm it).