Dragons are creatures with nearly unlimited life spans. They can survive for long periods of time, and no one has found a dragon that has died of old age. Adolescence 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. Once they hit adolescence, hatchlings change quickly, maturing to their full forms in only 2 years.

Dragons don't communicate with each other verbally, but they will growl to scare off predators and frighten prey. Young dragons will emit an extremely high-pitched squeal when they are frightened. To communicate, they use telepathy with each other and to speak to other creatures.

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.

Upon reaching adulthood, Amadaun was reluctant to leave the noble woman who raised him. He remains fiercely loyal to his master and his master's bloodline.  As such, he became his master's self-appointed guardian and served as a gatekeeper to her stronghold. When his first master died, he remained beneath the great gates. The gates came to be known as the "Dragon's Doorway," where Amadaun's vines remain as he continues to guard the gates of his master's descendants to this day.  Thieves, assassins, and all enemies of his master's family who attempt to pass through the gate meet their demise as they are devoured by Amadaun's vines. Amadaun, like all dragons, uses telepathy to communicate with other beings. As such, he may read a visitor's intent as they draw near.