Thunder Dragons are the masters of electricity. Their wings gather energy as they soar through the clouds, and when they clap their wings together they can create devastating arcs of lightning. They can stay airborne nearly indefinitely, landing only to sleep and breed; they catch their prey from the air and take moisture from the clouds. A thunder dragon’s roar is considered to be an omen of misfortune.

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.

Of the most powerful dragons of the cave, Rhiannon is known for her lightning. Because of her strength, she is believed to be a Goddess. But she'd not be the one to tell if she was or not. She is not the most social dragons, but a very respected one indeed. She is known for her emotionless glare and lacking care towards the survival of the clan as a whole. She only cares for the few close to her, Which is her mate, Zephyrus and her two friends Astarte and Tannus. Rhiannon doesn't usually speak to dragons who have not proven themselves worthy of the title "God" or "Goddess."