The Dragon Hierarchy trilogy

In the lands of Auratora, there once many centuries ago had been a long fought out war between the mystical creatures of all kinds and the humans. Then one person and a mystic changed all that. They became friends and united the humans and the mystics together and have lived in unity and peace for many centuries to come. A handful of mystics were chosen to go into deep slumber so to always watch over the lands and to always be there for if the day came to once again fight alongside the humans. Many centuries passed when suddenly the lands of Auratora finds itself under attack from another land. This new foe has the ideal to eliminate magic and to rule the lands of Auratora. They attacked the head capitol that honored the dragon mystics and killed many of the citizens before a spell was casted on the kingdom that now keeps the enemy out, but it's citizens vanished. After this sad day, it was said that all of the mystical creatures, too, had started vanishing along with the magic in the land. Now years later, a young girl named Cleah,who was raised among the nomads who honor the Pegasus and the unicorns in time passed, meets a strange man who is traveling to reawaken the mystics of old and to find their chosen humans. Cleah soon finds that she was no normal girl and soon brings danger to her homelands, but yet finds she might be the one truly needed to save it.