Dark Dragon King

Every race has a king the humans, the elves,the dawlfs, and the like. they all have monarch's but why is there no Dragon King. Such heavenly divine creatures the masters of the world they have no order, they are being hunted for sport.  then one day in the darkness of a dungeon an ancient black dragon awakens, a being first of his kind sleeping since the beginning he awakens. and at the hands of nine year human boy. an ordinary boy thrusted into a war between gods. his destiny set into motion on a whim.