Storm Dragons are the masters of the skies. They are excellent fliers and land only to rest and eat. In addition, they have full control of the weather. They are very hot-tempered and easily angered. They will attack any human that bothers them, conjuring strong winds and dangerous lightning.

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.

Rumbling Thunderstorm Calling is the same age as another dragon called Dark Flames of the Night. He is not the leader though. Everyone knows that and they know Dark Flames is leader of leaders in the clan until the rightful leader comes up. Thunderstorm is too short tempered to be leader of leaders and he doesn't even want to be the leader even if he could. But being the oldest Gray dragon in the clan, he has to be the leader of all the Gray dragons that comes after him and manage them well. He only accepted that because it was necessary and he could not disobey the leader of leaders even if the leader was temporary until the true leader came. They all wait for that day no matter how long it will take. And in the meantime, they all report major things to the leader of leaders.