Ancient Dragon

All that remains of once-great dragons, now reduced to nothing but bones. Long ago there was a small nation that researched on the use of dragons in battle. Many dragons were killed after it was found that the dragons couldn't be controlled, even with the collective power of all the mages in the nation. The amalgamation of all the dragons killed in the name of research became known as the ancient dragon, which is fueled by the hatred it harbors against humans.