Vampire Dragons are members of the undead. They sustain themselves by drinking the blood of others. It is said that they are only “alive” at night, and seem dead or asleep during the day, as they cannot endure sunlight for long periods of time. Vampire Dragons can only reproduce by changing the eggs of other dragons, puncturing the shell with their fangs and injecting venom that kills the baby inside.

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.

Terror Of The Darkness is an evil female Vampire dragon. She's the leader of a gang of female Vampire dragons, commonly known as 'Terror's Gang'. Terror is one of the oldest Vampire dragons living on the lands of HeroHorse. A clever, vicious dragon, Terror and her gang have two great enemies. These are the Soulpeace dragons who wish to stop the gang's activities (murder, torture and theft, just to name a few) and a rival male Vampire dragon gang led by Outlaw of the Darkness, Terror's own bitefather.

An ancient castle in "The Dragon's Teeth" mountain range is Terror Of The Darkness's home. Here, she keeps rooms filled completely with gold and gems. Terror's living rooms are also extravagantly decorated. She's despised by her bitefather for turning against him and disliked by her biological parents for resorting to a life of crime.

However, Terror Of The Darkness doesn't regret her turn to evil. She's satisfied with living a life of crime and isn't afraid to admit it.