Prologue?

At 11:00 one night when I was 9 years old my gramps told me a story, you probably never heard of it but if you want to know keep on reading. "Once there were six wizards, they made the biggest change ever to happen to us." I asked my gramps "Was it even bigger than Harry Potter?" My eyes open wide. He answers with a grin on his face "Yes they were... yes the were."