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.

When Siwang Tianshi Egg was found by his new owner, the egg was so cold that the owner thought the egg was dying. But after some days, despite of the eggs cold shell, a little hatchling hatched from it. In the beginning the hatchling appeared to be dead, but he began to try biting other eggs.

Slowly the hatchling grew up to be a very strong and fearless dragon. Siwang Tianshi is hard to handle and does not really obey to his owner. In fact this dragon appears to be very lazy, sleeping all day long because he doesn't like sunlight. He only moves around to get a bite.

Sometimes the hatchlings of this cave, are playing dangerous plays, trying to wake up the dragon. If Siwang Tianshi ever awakes from the hatchlings' plays, he would not hesitate but sucking their blood. He also tries to bite any other egg, that's around him, making it difficult for the other adults to take care of them.

The name Siwang Tianshi is actually a Mandarin Chinese Name and means "Death Angel".