Quote from Shadowrisen >>I'm going to answer your actual question, which was "how may packs do I need to buy to complete a set while using duplicate dust to fill in on the back end?"
The answer is roughly 240 packs. I base this not on any calculation, but on the fact that I always do this, have always done this since the beta, and I've never taken more than 255 or less than 232.
I upvoted this comment and also wanted to quote it for more visibility, because there are so many wildly incorrect estimates in this thread. This is a great piece of information.
I can add that I have opened between 190 and 230 packs of all expansions and I do not have all the cards of any of them, but I have got close on some of them, so these figures seem reliable to me.
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sure, 10 mana, 6 overloads, 3 cards combo including 2 legendaries, you better have some results...
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Easy 12 wins, only lost once to control mage who got jaina turn 9... I fed on aggro so much, they don't have a chance! 4 odd rogues, 3 odd pally, 2 zoolocks, 2 control locks and 1 hunter.