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.

Lyliam Dalagh is usually ready to take other's advice and act with justice. But it is not easy to change his mind because he is stubborn and sometimes prejudiced. Although Lyliam may be introverted by nature, when an opportunity is presented he can become quite dignified and eloquent speaker. He faces danger fearlessly, and betrays no fear in face of threats. He has a natural and intense trust in himself. All of these features help him to put everything into order in times of trouble. Lyliam has the ability to create, shape and manipulate plants, including wood, vines, plants, moss, and parts of the plants, such as leaves, seeds, fruits and flowers. He can cause plants to grow, move, attack or even rise from the soil, mutate plants by rearranging DNA structure and revive withered or dead plants. Lyliam uses his power for defense and support or even to possibly use plant chemicals to heal people or dragons. Lyliam is known in his clan to be handsome and for his gorgeous flowers.