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 theirs fangs and injecting a venom that kills the baby inside.

Calloinus, knowing that he is of a rare breed, intends on converting many eggs. He's quite somber and never wants to play with the other dragons, considering Converting to be his only mission in "life". The only issue is, he hasn't quite figured out how to do so, and neither has his owner, ClandestineDuck.