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.

Untamed Mare is one of Phoenix's dragons. She is a very difficult dragon to get along with, as she simply refuses to ever admit to being wrong. She has a bad temper and can be extremely unreasonable in her demands, becoming progressively more ridiculous and thoughtless as her attitude meets resistance. In spite of her age, she has a lot of growing up to do.

Somehow, all of her flaws aside, Mare has managed to catch and keep her mate, There Are No Heroes, a hellfire dragon. They clash constantly, and fight quite violently with one another (upon hearing a commotion, many of her clanmates will gather to make bets on whether that fight will mark the end of Mare and Hero's relationship) but when they make up a mind to watch one another's backs instead of stabbing them, they can become a terrifyingly deadly pair. They have had several children, two of which remain in the clan: I'll Rip Your Guts Out, and Kill Them, both of which have inherited their parents' unpleasant habits.