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Trying to build a deck that almost entirely uses colorless mana. Makes the deck easily adaptable to your favorite color(s). I used the Sidedeck in part to contain additional eldrazi creatures that would be easily accessible if you happen to be able to activate Spawnsire of Ulamog's ability. You could also have only Spawnsire of Ulamog in the deck and place the remaining Eldrazi in the sidedeck or just have them readily available.
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