User blog comment:BlackWizardZeref/Fairy Tail Chapter 382: Alegria/@comment-24734283-20140428212423/@comment-24039250-20140429031846

I feel that Lucy will get all of the keys including the 13th one somehow, which will lead her to getting The Platinum Key, which allows the user to summon The Celestial King. Only one who possesses all the Golden Keys can obtain The Platinum Key. This is what I hope happens, especially since we have many more battle coming including that epic Zeref Arc in the final Arc. I can see it now: Zeref summons thousands of demons and END if not killed in this arc will also appear along with Agnologia. Lucy will need one hell of a power up to last in that Arc, and either this or One Magic will be the thing.