We Won't Stop Until We're Saved

A long time ago, dragons and human roamed the Earth as one. Every day, you would see a dragon rider, dragons many different colors. Green, blue, brown, bronze, or gold. But there were a few black dragons, rare, even back then...
But now, only 4 dragons remain, 3 still in their egg. Will they hatch in time to destroy the evil King who now rules? Or will they let time pass and let chaos take control of the world?