"Long ago, when man was young and the dragon already old, the wisest of our race took pity on man, so he gathered together all the dragons, making them vow to watch over man always. And at the moment of his death, the night became alive with those stars.

And thus was born the Dragons' Heaven. But when we die, not all dragons are admitted to this shining place. No, we have to earn it! And if we don't, our spirit disappears as if we never were."
Draco
the last of the dragons