Dark green dragons, once they mature, appear to become an entirely different species. However, this isn’t true. Rather, they burrow underground and get nutrients from their vines. These vines are sometimes referred to as Dragon Grass. These dragons are very violent, and will use their vines to capture, kill, and eat anything that moves, as well as nearby plants. Luckily, their range is limited and they cannot use magic. Dark green dragons tend to be easy to spot since they usually kill all plants around them and thus are usually surrounded by a large clearing.

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.

Dematrius is the guardian of the pride's cavern entrance. As one of the first dragons to join the pride, he has a prime position in the meadow in front of the cave. He recognizes the tread of all the members of his pride, and allows them to pass freely, though he will snap at them if they linger on his territory. Any unfamiliar creature that passes over his roots is fair game. The few other dark green dragons that he tolerates have rooted on the far edges of the meadow, well out of his reach.