You know how in kingdom hearts II there is a different colored heart-shaped Moon been in birth by sleep so I think that there is another version of the x-blade out there so I made up a fan theory that I called the balance blade theory! it is we wear every welder that pulled a piece of the balanced blade has to keep lights one of light and one of darkness . And the person that got the first two balance blades which has the Moon blade and sun blade . He is the strongest out of all of them and there are a lot more than just him when they combine all their power they make the complete balanced blade and whenever combined with the x blade that virgin can open the true kingdom heart .