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.

Apostrophy; or known as 'Apocalypse', 'Calamity', and 'Appo'; is a dark dragon. Even if he is a horse dragon, he can be very harsh and rude toward his cave friends. He is a true playboy, flirting and having offspring with every female dragon he likes. Rumour has it that he has killed another male just for the fun of it.