Masteria Expansions, Names and the proof for each

Seeing as only TMS, GMS, and EMS have Masteria, how would they be able to fit in the WHOLE storyline of the Black Magician in other versions, if parts of the history were revealed in Masteria? All versions have stories about the Black Magician, and if one version had the whole story, and another only a fragment, doomed to never get the whole story, how would the whole story be told? That's like giving someone half of a book, only to be doomed to watch as other kids get to read the whole book.

No, what we have here is only a disciple. It's more of a side thing, if you ask me.