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.

Green dragons are also sometimes called "earth" dragons. They usually live deep within caves, and have power over the earth. They are capable of launching boulders at high speeds, and can cause earthquakes by slamming down onto the ground.

Known to nearby villagers as "Thunderer", this dragon is a possessive and territorial beast.  Having made his den in a secluded swamp cavern, he quakes his land to terrorize travellers trespassing on the treacherous path through his bog.  These reckless displays of power attracted Azagwid Mirra to his side, a proud daughter of the gold Swift Mirral.  As a vicious defender of what is his, Leithyr goes to great lengths to provide for and protect his dependent young and their mother.