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As the link notes, Blizzard complied with Chinese law regarding posting odds and posted a page on their Chinese Hearthstone site (http://hs.blizzard.cn/articles
by ThrowawayR2 9y ago
As the link notes, Blizzard complied with Chinese law regarding posting odds and posted a page on their Chinese Hearthstone site (http://hs.blizzard.cn/articles/20/9546 http://hs.blizzard.cn/articles/20/9546) stating that, on average, 1 legendary card could be expected for every 20 packs (of 5 cards).
It is possible that Blizzard uses different odds by region but that seems unlikely.
- minimaxir 9y agoFair distinction; added edit. It would not surprise me if odds were indeed different by region. It would be smart to do that, anyways, since player behavior may be different.