Once upon a time, Dragons were hunted for their magic. Soon, they faced extinction at the hands of the beings they were meant to protect. The remaining dragons gathered, along with some of the other magical races facing genocide and formed a plan. Then, in a singular act of desperation, they left... taking earth's magic with them.
However, when evil is engaged, the unexpected happens and one got left behind…
Travelling through space on the edge of their Song, the galactic refugees had to stop thrice losing whole tribes of magical beings along the way.
They also lost the Song which fractured along with the beings who sang it.
Now, earth is in trouble. It needs the magic carried away by the dragons.
And the dragons... they believe earth is just a story told to scare hatchlings into behaving.
However, a promise was made, and a promise will be kept. The time is coming where it must be fulfilled or Dragonkin will disappear forever.