Finding Harmony (a foal's tale) [ an mlp fanfic]

when their parents disappear, flash freeze and his older sister, winter prism,
along with his three best friends, crystalline, lighstar, and dragon song,
go out to find them, meeting many perils along the way, and using mystical gems they have been given, called the elements of harmony...but they don't know how to activate them! and there's a darkness brewing, will the villains of old meet their evil goals? will the foals succeed in their mission to find their parents, and stop the world falling into eternal chaos? find out in this book!