- Received a duplicate Legendary card
- I get lots of duplicate cards when opening packs
Note: The below rules do not apply to Mini Sets. Mini Sets are bundles of specific cards. Mini Sets are not card packs and are not subject to randomness. If a Mini Set includes cards you already own, you will still receive those cards.
Opening a pack in Hearthstone adds five cards to your collection. There are rules in place to make sure your pack opening experience is exciting.
Card Rarity Rates
- Rare Cards: Each card pack contains at least one rare card or better.
- Epic Cards: One epic card can be obtained in five card packs on average.
- Legendary Cards: One Legendary card is guaranteed within the first 10 packs of a new card expansion. Subsequent Legendary cards can be obtained in 20 card packs on average.
Obtaining Multiple Copies of the Same Card
You will not receive more than one copy of a Legendary card, until you have owned all the Legendary cards in that card expansion. Similarly, you will not receive more than two copies of any Common, Rare, or Epic card until you have owned two copies of all cards of that rarity in that card expansion.
For example, if you have two Knife Jugglers (rare card from the Classic set) you will not receive another Knife Juggler until you’ve owned two of every other Rare card from the Classic set.
Crafting a card counts towards owning it, and any cards you disenchant (whether golden or non-golden) count as well. This means that if you get a card that you don’t want, you can disenchant it and you will not receive it again until you have all cards of that rarity from that card expansion.
Cards that you disenchanted before March 26, 2020 do not count towards duplicate protection.
Receiving many Common cards?
The rules that protect you from receiving multiple copies of the same card do not affect the overall distribution of rarities in each pack. This means that you are still only guaranteed to obtain one Rare (or better) card per pack, and you are intended to receive, on average, one Epic card every 5 packs, and one Legendary every 20 packs, as explained above.
For example, even if you have all the Common cards of the set, your packs will still contain common cards. Having all the common cards doesn't mean your packs will have more Rare, Epic, or Legendary cards. You are, however, guaranteed to not obtain a third copy of a Rare or Epic card until you have two of every other Rare or Epic card on the set.