Got golden millhouse from my brawl pack
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I just realized that the weekly brawl packs also serve as a buffer against getting current expansion legendaries due to the pity timer. Because I open a classic brawl pack each week, I'll most likely get pity legendaries I already have from classic. Not that this was the main reason packs stayed as rewards for brawls, but it's certainly a side effect they'd like.
Once I start spending gold again next week, it won't be quite as likely, but it'll still be a factor.
Has anybody tested whether or not the pity counter is used upon earning a pack vs when you actually open it? It would be difficult/expensive to test, but you could earn/buy 40 packs and then earn/buy another 40 of another type. Each type should have at least one legendary. If one type ended up with two and the other none, then it must be calculated when you actually open a pack.
Maybe I could just stop opening up the classic packs until I have everything I want from the current set.