The whole moonlight idea was mine, in which the moon illuminates from light. That artificial light only illuminates to its fullest when in Darkness. It's not real light to be truthful but rather a dim reflection of it. I also considered the importance of the moon in BBS being blue in which the illumination of the moon from light can give a distinct color of blue to the human eye, not to mention the new enemies being blue. MX on a side theory, could have fallen close to darkness in possibly constructing the dark keyblade or perhaps experimenting on his apprentice, which can only be achieved when finding KH , either way the extended use of dark magic (darkness) can swallow that person in complete darkness, not leaving a heartless, as heartless were not around at this moment. I like to keep in mind that Riku when using his dark form would fall closer to darkness but with the love of his friends he managed to hold a glimmer of light keeping him from being swallowed by darkness. Sora who became a heartless was enveloped with light from Kairi creating a shell in his image or container for his heart while his body and soul Roxas was elsewhere. In any case, the stabilization of the heart has kept the body from completely falling into darkness. What kind of place can keep a heart from dividing itself from the body? memories of course, any extent of regaining or reliving memories of moments that hold the heart in keeping it stabilized. Castle Oblivion in betwixt of its name is a place in which you are able to relive memories of past events and although Sora lost his memories, it was only in the affect of Namine manipulating and unlinking memories. Oblivion may refer to being in a place oblivious to others hence the master and apprentice missing or unheard from. Memories can stabilize the existence of the heart, Artificial light can be used to form a shell in which the body is also not swallowed by darkness, and kingdom hearts can be filled with hearts that MX can use in absence of his former heart. If all is stabilized he will be able to contain the power of darkness (Soras dark form for example) and absorb KH making absolute power in balance of true light and pure darkness. A being of incomprehensible power. Also on another note, MX mocks Terra of trying to hold a glimmer of light...
Another Report article:
There is one more method, which is the use of the “Dark Corridor.” There are those who are on a fallen path, essentially not being on the path they should be. Only those who can be said to have a Dark existence or an Inbetween existence can make these doorways. On rare occasion, those with particularly strong feelings or hatred, such as the case with the Beast, DiZ, and perhaps others like them, can open these paths. However, you must be careful when coming into contact with such Darkness. As such, if you use these paths too often you will be completely swallowed by Darkness.
...Terra anyone?? We see him pull off his helmets and watch as his eyes turn yellow, and his expression of rage, at that moment he was falling into darkness.
Another Report article
about the opened door of the integrated heart of worlds “Kingdom Hearts” itself, to prevent the outflow of the Darkness within hearts, the intent and reasons were different so the Keyblade was used for a different purpose. In order to work, the door needs to be closed from both the Dark side and the Light side and both a Dark and Light realm Keyblade are needed. The King needed a Keyblade opposite from the realm of Light Keyblade that Sora had, so he went to the realm of Darkness to obtain one.
When MX possibly summoned KH it is apparent that when he opened it, the outflow of darkness would come from hearts resulting in mass darkness and would very well affect those who in someway have fallen or come in contact with previous darkness, a clash with MX, DS, and Terra could have caused some disdain result of darkness melding together.
That darkness sooner or later would become the heartless
