Just thought of this: I think you are not allowed to have 80+ of those guys on your sideboard. Rules state that you can have only 4 of a card (except basic land of course) in both your deck and sideboard. Unless you are playing casual, in which case whatever!
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I do have to say, it is one of the best and most creative win conditions I have ever seen in my life. That said, if you seriously owned that many of each of those eldrazi... well... lets just say you are either super rich, or super "lucky"