以前有講過 玩家也有自己統計 不過在官方的網頁好像是第一次公布?
https://tw.battle.net/support/zh/article/32545
https://us.battle.net/support/en/article/32545
應該是因應行動裝置的機率透明化政策貼的(?)
Card Rarity Rates
Rare Cards:
Each card pack contains at least 1 rare card.
每包卡包至少有一張精良 (實際上應該是精良"以上")
Epic Cards:
One epic card can be obtained in 5 card packs on average.
平均5包卡包一張史詩
Legendary Cards:
One Legendary card can be obtained within the first 10 packs of a new set.
每個資料片的前10包會有一張傳說
Note: Subsequent Legendary cards can be obtained in 20 card packs on average.
第一張傳說之後 平均20包一張傳說