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.

Stone dragons have a tough outer covering made of a stone-like material. They eat rocks, using the minerals they contain for nourishment and to keep up their stone outer shell. They rarely move, and are the heaviest of all types of dragons. Although they have wings, indicating flight ability, no one has ever seen a stone dragon flying.

Gazing sleepily up into the starry sky, Erthma gently lowers herself onto the rocky outcrop of her home, hidden away from all humanity in the cliffs. She settles down for a long while, seeing as stone dragons do not tend to move too much. A grumpy dragon, she seems to scare away any type of animal that comes in search of food in her cave. Yet, when she notices a baby squirrel glancing at her nervously, she does nothing. Unknown to most, Erthma has a soft spot for babies, because she craves her own family. She lets the young squirrel settle down against her, and she sighs in content, letting a smoke ring rise above her head and blow away in the breeze. Slowly she lets her heavy lids close, as she drifts off to dream about her own family, that shall never be...at least...no time soon.