There's a limit on dragon souls, not ever being able to surpass a fixed but unknown number. That compensates that a dragon is mostly an eternal being. Normally, like any other being of Eden, when a dragon dies, his soul returns to the Limbo and reincarnates in another dragon. But dragons are able to recall some information of previous incarnations, a phenomenom they call "Racial Memory", also, if they get powerfull enough, they can reach an state called "The Pinacle". In such state they become truly inmortal, able to reconstruct their bodies without need to reincarnate. Its almost imposible to force an inmortal dragon to reincarnate.
Most of major dragons are towering creatures. The resemble winged reptiles with four legs (Six limbs in total) because of their scales, but are not related to them.
Lay eggs. Able to reproduce and create hybrids with anything.
Can eat anything they can chew, even stone.
Able to see in complete darkness
Civilization and Culture
They use mostly personal names, using clan names if they are vassals of other dragons.
Onternian Free Cities,
and Moon Empire