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.

The venom in Vampire in the Shadow's fangs can burn into objects or cause eternal sleep. When she was an egg, her mother was the guardian of the ancient Dragon Temple. A war soon started and her mother was attacked. After the battle, a vampire dragon known as Venom went to the ruins of the war. He found her egg in the remains. He decided to raise it and so he bit into the egg, which successfully turned into a vampire. Now that she hatched and grew, she hunts the warriors that attacked the temple, looking for revenge for her dead mother...