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.

Magi dragons are, as their name suggests, primarily magic users. They rarely use physical forms of attack. They eat anything they can kill, which is almost everything. They won't kill unprovoked except when hunting, although they may kill humans if in danger. Their strong magic makes them one of the most feared breeds of dragons.

Nighttime Sun tries to be the leader of things, making sure everything runs smoothly in the cave, even though he is much younger than many other dragons. He breaks up fights (sometimes unsuccessfully) and tends to young hatchlings. When Kazpin the Wanderer was still in the cave - before he went off to some foreign land on his own - taught him some of his healing magic, though Nighttime Sun knew he would never come close to the healing powers of a white dragon. Nonetheless, his healing magic is a bit more effective than that of other magi dragons - even though their other magic skills sometimes far surpass his.