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.

Crimsonfang isn't an official member of the cave. She has often fought battles against Eternal Midnight in an attempt to bite the eggs. She once got very close. She warded off Eternal Midnight by biting him, and he thought that he would turn into a vampire dragon, and she ran to the eggs, when A Bunny of Ebony, Eternal Midnight's mate, rushed up and injured her until she fled. Eternal Midnight turned out to be fine.