And the prophet spoke: For when the Keyblade warriors, both master and apprentice, worked together, there was peace, they defended Kingdom Hearts, realizing the great power it contained, but one man learned the truth, he stepped forth with the name of Master Xehanort, and believing he could control the great power of Kingdom Hearts, set out to conquer it, first by the power of the POH... Meanwhile, no-one was aware what MX and his new DA were after, and a master sent his apprentices VAT to find MX and ensure everything was okay, for there were tales that when he disappeared, trouble would follow. As for Unbirths, there is one idea many have not entertained. What besides Soul and heart control a persons actions? Memories, the memories of a person influence how they will act, So I believe Unbirths are the very memories of a person. If you think about it, it seems to fit in nicely with some other things in the BBS videos, such as Ven "Forgetting something." I don't know how they are made, no-one does, and no-one knows why they didn't exist during KH1 and 2 but it probably has something to do with MX's disappearance. So in summary, MX - Kingdom Hearts, Unbirths - memories, VAT - MX, got it memorized?