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The strategy is to stall and delay opponents' own abilities to play cards until I have enough mana on the field to bring out the Sphinxes. Bonehoard is included for the times when Chancellor of the Spires is my opening hand and when Hedron Crab can come out on the get-go and cause problems with people's libraries. There is also a major emphasis on arranging/controlling my own library with a lot of draw and scry options--Halimar Depths and Deprive as an example. I don't think this would win most serious matches, but may be a lot of fun for casual standard play.
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