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.

While Sumac Thuwed kills most of the plants around her, there's one type she leaves alone. She claims she lets the poison ivy grow out of respect for a plant that's as nasty as she is, but the true reason is that she remembers all too well the last time she attacked a stubborn clump with vines and teeth. Sumac learned the hard way that even dark green dragons aren't immune to poison ivy, and even years later just brushing against a leaf will bring on another painful, itchy rash.