The Sixteen Elemental Dragons

What if there were sixteen or more dragon slayers in total? How would this change Fairy Tail, Fiore, or even the whole world? If you want to find out, then you're gonna have to read the story all the way through! This is an SYOC story. Disclaimer: I don't own Fairy Tail or any OC's I attach an account's name to. Rated M for cursing, possible blood or gore, and some fluffy moments.