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I fail to see how you could trigger the beastmaster one turn one.
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Lands grant for land, all the zero drops to trigger beast master, the concordant crossroads for haste, and the mox opal spirit guides lotus petals and taiga for the mana. Its possible
Turn one you don't have enough cards to get seven creatures, concordant crossroads, beastmaster, and the mana production for it. You can't pull this off turn one.