Rise of the First Guardian

You have heard of the guardians which contains North (aka. Santa Claus), Sandy (aka. Sandman), Tooth (aka. Tooth Fairy), Bunny (aka. Easter Bunny), and the now recruited Jack Frost. But what if there was another Guardian? Meet Tera or also known as Mother Earth and many other names given to her throughout the centuries. Not only she is a guardian, but the first guardian created by the moon. She's been there and helped with every guardian become who they are today and plans to do the same with Jack who doesn't remember who he is in his past life. Do the two have some sort of past together? Will they be able to defeat the Boogeyman once and for all?