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.

Kei's 99 Black Candles is a vampire dragon who lives in Shadow Forest, called this because it is almost always dark due to the denseness of the trees. It is often called "Hell's Gate" because it is home to many dangerous creature of the night, and it is easy to get lost inside the forest. He lives in a cave deep in the wood, protecting 99 Black Candles, thus his name. The candles are lit and held in sconces on the back wall of the cave. No one knows the purpose of the candles, nor why he guards them.