ok I was thinking about those keyblades that dont have key chains and some people were saying that they were not "real" keyblades but what I was thinking what if once you real a certain level of power and proficiency with you keyblade no longer needs a key chain and is more powerful without one. Or it could be that once your heart has finally become strong enough the keyblade can take its true form without a key chain. I know it sounds really weird but it was a random thought that came to my mind and I thought I would share it