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.

Anibal Ascertes is part of the Hellpack, a group of Hellfire Wyverns and Horses that live slightly separated from the rest of the flock. Having started with a few mated pairs made of one of each breed, they take in new wild-born Hellfires and Horses every generation, as mates for their Hellhorse offspring.

Anibal, mate of Agrippa, is one of the founders of the Hellpack. He'd become interested in reading through the records of the flock's lineages, and in how a particular dragon's ancestors could be tracked back for centuries.

He gathered up a small group of Hellfires and Horses and convinced them to come with him and start a "special lineage", something that would be pretty and make their offspring desirable.

The group set up home in the jungle-covered foothills of a mountain range, in a nice conveniently empty (with a little persuasion) fort, which they still inhabit to this day.

The rest of the flock doesn't mind. The Hellpack are a nice guard for that stretch of their territory.