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Card pack concept art

Card packs are items that players can open to acquire cards for filling a player's collection.

Every expansion has its own type of card pack with unique artwork, and each card pack contains 5 cards from that card set. Each card opened has a chance to be of common, rare, epic or legendary rarity, but each pack is guaranteed to contain at least one card of at least rare rarity.[1] Each card opened also has the chance to be a golden version of that card. The chances for rarities and golden versions are the same for all types of card packs,[2][3][4][5] and is well-documented in the statistics section below.

Card packs are the most cost-efficient means of obtaining cards. They offer the quickest way of expanding the player's collection for a particular set, but when wishing to obtain a specific card, players will generally find it cheaper and quicker to craft the card instead.

As of Patch 16.0 (Descent of Dragons patch), all card packs, Standard and Wild, are available for purchase in the in-game Shop. However, only Standard card packs are awarded from in-game rewards, such as Ranked rewards and Arena rewards.

Opening a pack[]

A gnome opening a new card pack.

Card packs can be opened by clicking on the "Open Packs" icon from the main menu screen. The number underneath the icon indicates how many unopened card packs you currently possess.

Once the Open Packs screen has been reached, all current unopened packs will be displayed on the left-hand side. Drag a pack over to the right-hand section or hit the space bar to open it. Once you open a pack, 5 cards appear face down. This forces you to turn each card individually either by hitting the space bar or clicking each card.

Hovering over a card shows a border depending on the rarity of the card. Hearthstone uses quality colors based on World of Warcraft's gear system.

  • No color means the card is of common rarity
  • A blue glow means the card is of rare rarity
  • A purple glow means the card is of epic rarity
  • An orange glow means the card is of legendary rarity

How to get[]

Standard format card packs can be obtained in many ways. They can be gained from competing in the Arena, for your first Tavern Brawl win each week, from Ranked rewards, from certain quests, or they can be purchased from the in-game Shop, either for gold or for real money. Standard format card packs can also be purchased from the online shop. Classic card packs can also be obtained as rewards through the Recruit A Friend system.

Wild format card packs are never granted as rewards. However, Wild format card packs can be bought from the in-game Shop. Players who had packs left over when the set moved to Wild format can still open them and receive cards as normal, and players can still obtain Wild format cards through crafting.

Types of card packs[]

Classic Pack
Goblins vs Gnomes Pack
The Grand Tournament Pack
Whispers of the Old Gods Pack
Mean Streets of Gadgetzan Pack
Journey to Un'Goro Pack
Knights of the Frozen Throne Pack
Kobolds & Catacombs Pack
The Witchwood Pack
The Boomsday Project Pack
Rastakhan's Rumble Pack
Rise of Shadows Pack
Saviors of Uldum Pack
Descent of Dragons Pack
Ashes of Outland Pack
Scholomance Academy Pack
Forged in the Barrens Pack
United in Stormwind Pack
Madness at the Darkmoon Faire Pack
Mercenaries Pack
Fractured in Alterac Valley Pack
Standard Pack
Wild Pack
Year of the Dragon Pack
Year of the Phoenix Pack
Hunter Pack
Mage Pack
Druid Pack
Paladin Pack
Warrior Pack
Priest Pack
Rogue Pack
Shaman Pack
Warlock Pack
Demon Hunter Pack
Golden Classic Pack
Golden Scholomance Academy Pack
Golden Madness at the Darkmoon Faire Pack
Golden Forged in the Barrens Pack
Golden Standard Pack
Golden United in Stormwind Pack
Golden Fractured in Alterac Valley Pack

Available in Shop[]

NameCard setsClassesPity
timer?
Legendary
in first
10 packs?
Wild - Card pack.png
Wild Pack

Descent of Dragons Saviors of Uldum Rise of Shadows Rastakhan's Rumble The Boomsday Project The Witchwood Kobolds & Catacombs Knights of the Frozen Throne Journey to Un'Goro Mean Streets of Gadgetzan Whispers of the Old Gods The Grand Tournament Goblins vs Gnomes EXPERT1

Demon Hunter Druid Hunter Mage Paladin Priest Rogue Shaman Warlock Warrior Neutral

Green tickY Green tickY
Standard - Card pack.png
Standard Pack

Fractured in Alterac Valley United in Stormwind Forged in the Barrens Madness at the Darkmoon Faire Scholomance Academy Ashes of Outland

Demon Hunter Druid Hunter Mage Paladin Priest Rogue Shaman Warlock Warrior Neutral

Green tickY Green tickY
Fractured in Alterac Valley - Card pack.png
Fractured in Alterac Valley Pack

Fractured in Alterac Valley

Demon Hunter Druid Hunter Mage Paladin Priest Rogue Shaman Warlock Warrior Neutral

Green tickY Green tickY
Mercenaries - Card pack.png
Mercenaries Pack

Mercenaries

Green tickY
Madness at the Darkmoon Faire - Card pack.png
Madness at the Darkmoon Faire Pack

Madness at the Darkmoon Faire

Demon Hunter Druid Hunter Mage Paladin Priest Rogue Shaman Warlock Warrior Neutral

Green tickY Green tickY
United in Stormwind - Card pack.png
United in Stormwind Pack

United in Stormwind

Demon Hunter Druid Hunter Mage Paladin Priest Rogue Shaman Warlock Warrior Neutral

Green tickY Green tickY
Forged in the Barrens - Card pack.png
Forged in the Barrens Pack

Forged in the Barrens

Demon Hunter Druid Hunter Mage Paladin Priest Rogue Shaman Warlock Warrior Neutral

Green tickY Green tickY
Scholomance Academy - Card pack.png
Scholomance Academy Pack

Scholomance Academy

Demon Hunter Druid Hunter Mage Paladin Priest Rogue Shaman Warlock Warrior Neutral

Green tickY Green tickY
Ashes of Outland - Card pack.png
Ashes of Outland Pack

Ashes of Outland

Demon Hunter Druid Hunter Mage Paladin Priest Rogue Shaman Warlock Warrior Neutral

Green tickY Green tickY
Descent of Dragons - Card pack.png
Descent of Dragons Pack

Descent of Dragons

Druid Hunter Mage Paladin Priest Rogue Shaman Warlock Warrior Neutral

Green tickY Green tickY
Saviors of Uldum - Card pack.png
Saviors of Uldum Pack

Saviors of Uldum

Druid Hunter Mage Paladin Priest Rogue Shaman Warlock Warrior Neutral

Green tickY Green tickY
Rise of Shadows - Card pack.png
Rise of Shadows Pack

Rise of Shadows

Druid Hunter Mage Paladin Priest Rogue Shaman Warlock Warrior Neutral

Green tickY Green tickY
Rastakhan's Rumble - Card pack.png
Rastakhan's Rumble Pack

Rastakhan's Rumble

Druid Hunter Mage Paladin Priest Rogue Shaman Warlock Warrior Neutral

Green tickY Green tickY
The Boomsday Project - Card pack.png
The Boomsday Project Pack

The Boomsday Project

Druid Hunter Mage Paladin Priest Rogue Shaman Warlock Warrior Neutral

Green tickY Green tickY
The Witchwood - Card pack.png
The Witchwood Pack

The Witchwood

Druid Hunter Mage Paladin Priest Rogue Shaman Warlock Warrior Neutral

Green tickY Green tickY
Kobolds and Catacombs - Card pack.png
Kobolds & Catacombs Pack

Kobolds & Catacombs

Druid Hunter Mage Paladin Priest Rogue Shaman Warlock Warrior Neutral

Green tickY Green tickY
Knights of the Frozen Throne - Card pack.png
Knights of the Frozen Throne Pack

Knights of the Frozen Throne

Druid Hunter Mage Paladin Priest Rogue Shaman Warlock Warrior Neutral

Green tickY Green tickY
Journey to Un'Goro - Card pack.png
Journey to Un'Goro Pack

Journey to Un'Goro

Druid Hunter Mage Paladin Priest Rogue Shaman Warlock Warrior Neutral

Green tickY Green tickY
Mean Streets of Gadgetzan - Card pack.png
Mean Streets of Gadgetzan Pack

Mean Streets of Gadgetzan

Druid Hunter Mage Paladin Priest Rogue Shaman Warlock Warrior Neutral

Green tickY Green tickY
Whispers of the Old Gods - Card pack.png
Whispers of the Old Gods Pack

Whispers of the Old Gods

Druid Hunter Mage Paladin Priest Rogue Shaman Warlock Warrior Neutral

Green tickY Green tickY
The Grand Tournament - Card pack.png
The Grand Tournament Pack

The Grand Tournament

Druid Hunter Mage Paladin Priest Rogue Shaman Warlock Warrior Neutral

Green tickY Green tickY
Goblins vs Gnomes - Card pack.png
Goblins vs Gnomes Pack

Goblins vs Gnomes

Druid Hunter Mage Paladin Priest Rogue Shaman Warlock Warrior Neutral

Green tickY Green tickY
Legacy - Card pack.png
Classic Pack

EXPERT1

Druid Hunter Mage Paladin Priest Rogue Shaman Warlock Warrior Neutral

Green tickY Green tickY

Class[]

NameCard setsClassesPity
timer?
Legendary
in first
10 packs?
Demon Hunter - Card pack.png
Demon Hunter Pack

Fractured in Alterac Valley United in Stormwind Forged in the Barrens Madness at the Darkmoon Faire Scholomance Academy Ashes of Outland

Demon Hunter

Warlock - Card pack.png
Warlock Pack

Fractured in Alterac Valley United in Stormwind Forged in the Barrens Madness at the Darkmoon Faire Scholomance Academy Ashes of Outland

Warlock

Shaman - Card pack.png
Shaman Pack

Fractured in Alterac Valley United in Stormwind Forged in the Barrens Madness at the Darkmoon Faire Scholomance Academy Ashes of Outland

Shaman

Rogue - Card pack.png
Rogue Pack

Fractured in Alterac Valley United in Stormwind Forged in the Barrens Madness at the Darkmoon Faire Scholomance Academy Ashes of Outland

Rogue

Priest - Card pack.png
Priest Pack

Fractured in Alterac Valley United in Stormwind Forged in the Barrens Madness at the Darkmoon Faire Scholomance Academy Ashes of Outland

Priest

Warrior - Card pack.png
Warrior Pack

Fractured in Alterac Valley United in Stormwind Forged in the Barrens Madness at the Darkmoon Faire Scholomance Academy Ashes of Outland

Warrior

Paladin - Card pack.png
Paladin Pack

Fractured in Alterac Valley United in Stormwind Forged in the Barrens Madness at the Darkmoon Faire Scholomance Academy Ashes of Outland

Paladin

Druid - Card pack.png
Druid Pack

Fractured in Alterac Valley United in Stormwind Forged in the Barrens Madness at the Darkmoon Faire Scholomance Academy Ashes of Outland

Druid

Mage - Card pack.png
Mage Pack

Fractured in Alterac Valley United in Stormwind Forged in the Barrens Madness at the Darkmoon Faire Scholomance Academy Ashes of Outland

Mage

Hunter - Card pack.png
Hunter Pack

Fractured in Alterac Valley United in Stormwind Forged in the Barrens Madness at the Darkmoon Faire Scholomance Academy Ashes of Outland

Hunter

Year[]

NameCard setsClassesPity
timer?
Legendary
in first
10 packs?
Year of the Phoenix - Card pack.png
Year of the Phoenix Pack

Madness at the Darkmoon Faire Scholomance Academy Ashes of Outland

Demon Hunter Druid Hunter Mage Paladin Priest Rogue Shaman Warlock Warrior Neutral

Year of the Dragon - Card pack.png
Year of the Dragon Pack

Descent of Dragons Saviors of Uldum Rise of Shadows

Druid Hunter Mage Paladin Priest Rogue Shaman Warlock Warrior Neutral

Golden[]

These packs always contains golden cards.

NameCard setsClassesPity
timer?
Legendary
in first
10 packs?
Fractured in Alterac Valley - Golden pack.png
Golden Fractured in Alterac Valley Pack

Fractured in Alterac Valley

Demon Hunter Druid Hunter Mage Paladin Priest Rogue Shaman Warlock Warrior Neutral

United in Stormwind - Golden pack.png
Golden United in Stormwind Pack

United in Stormwind

Demon Hunter Druid Hunter Mage Paladin Priest Rogue Shaman Warlock Warrior Neutral

Standard - Golden pack.png
Golden Standard Pack

Fractured in Alterac Valley United in Stormwind Forged in the Barrens Madness at the Darkmoon Faire Scholomance Academy Ashes of Outland

Demon Hunter Druid Hunter Mage Paladin Priest Rogue Shaman Warlock Warrior Neutral

Forged in the Barrens - Golden pack.png
Golden Forged in the Barrens Pack

Forged in the Barrens

Demon Hunter Druid Hunter Mage Paladin Priest Rogue Shaman Warlock Warrior Neutral

Madness at the Darkmoon Faire - Golden pack.png
Golden Madness at the Darkmoon Faire Pack

Madness at the Darkmoon Faire

Demon Hunter Druid Hunter Mage Paladin Priest Rogue Shaman Warlock Warrior Neutral

Scholomance Academy - Golden pack.png
Golden Scholomance Academy Pack

Scholomance Academy

Demon Hunter Druid Hunter Mage Paladin Priest Rogue Shaman Warlock Warrior Neutral

Legacy - Golden pack.png
Golden Classic Pack

EXPERT1

Druid Hunter Mage Paladin Priest Rogue Shaman Warlock Warrior Neutral

Purchasing[]

The following purchasing options are available. Only the single pack option is available for gold (although players can buy more than one pack at a time); all other options require real money. Players can use any of the payment methods that are also available for buying games and goodies from the Blizzard store.

Some of these prices were subject to changes on March 22, 2017 and may no longer be accurate.[6]

Packs Gold USD GBP EUR RUB* BRL AUD
1 100
2 $2.99 ($1.495 per pack, $0.299 per card) £2.99 (£1.495 per pack, £0.299 per card) €2.99 (€1.495 per pack, €0.299 per card) 149.00 р. (74.50 р. per pack, 14.90 р. per card) R$ 7,00 (R$ 3,50 per pack, R$ 0,70 per card) A$3.95 (A$1.975 per pack, A$0.395 per card)
7 $9.99 ($1.427 per pack, $0.285 per card) £8.99 (£1.284 per pack, £0.257 per card) €9.99 (€1.427 per pack, €0.285 per card) 499.00 р. (71.28 р. per pack, 14.25 р. per card) R$ 21,00 (R$ 3,00 per pack, R$ 0,6 per card) A$13.50 (A$1.929 per pack, A$0.386 per card)
15 $19.99 ($1.333 per pack, $0.267 per card) £16.99 (£1.133 per pack, £0.227 per card) €19.99 (€1.333 per pack, €0.267 per card) 999.00 р. (66.60 р. per pack, 13.32 р. per card) R$ 39,00 (R$ 2,6 per pack, R$ 0,52 per card) A$26.95 (A$1.797 per pack, A$0.359 per card)
40 $49.99 ($1.250 per pack, $0.250 per card) £44.99 (£1.125 per pack, £0.225 per card) €49.99 (€1.250 per pack, €0.250 per card) 2500.00 р. (62.50 р. per pack, 12.50 р. per card) R$ 99,00 (R$ 2,475 per pack, R$ 0,495 per card) A$66.95 (A$1.674 per pack, A$0.335 per card)
60** $69.99 ($1.167 per pack, $0.233 per card) £59.99 (£1.000 per pack, £0.200 per card) €69.99 (€1.167 per pack, €0.233 per card) 3500.00 р. (58.33 р. per pack, 11.66 р. per card) R$ 145,00 (R$ 2,417 per pack, R$ 0,483 per card) A$94.95 (A$1.583 per pack, A$0.317 per card)
* Russian Ruble prices are frequently changing due to unstable exchange rate.
** Only available on PC and Mac.

Note that a discount is offered when buying in bulk. Purchasing 40 packs of cards at once presents a 12-16% discount compared to buying cards in sets of 2. Exact prices and discounts vary by currency.

While no bulk purchase option is presented for gold transactions, players can double-click on the '1 pack' option to instantly order multiple packs by entering a number from 1 to 50. No discount is offered. Players are informed of this option upon entering the shop for the first time with a sufficiently large amount of gold.[7]

Statistics[]

Hovering over an Epic card.

Main article: Card pack statistics

Various attempts have been made to establish the chances of receiving each rarity of card when opening card packs. Note that all types of card pack have the same chances at rarities and golden cards.[2][3]

The following numbers combine data from several other studies. Since the numbers provided by each study are relatively similar, this is mostly for the convenience of a single overview of the statistics, as well as improved accuracy in the rarer cases. The original studies can be found in the linked article.

Currently included studies: Steve Marinconz (June 2014), E. R. Kjellgren (August 2014), Amaz (February 2015), HearthSim (August 2015). This produces a total sample size of 27,868 card packs, describing 139,340 cards in total.

Common Rare Epic Legendary
Percentage of total 71.65% 22.84% 4.42% 1.10%
Count per 27,868 packs 99,836 31,821 6,152 1,531
Probability of at least 1 per pack 99.81% 72.64% 20.21% 5.37%

In April 2017, in compliance with Chinese law, Blizzard published official probablities of card drops.[8] Though the official announcement applies to the Chinese region only, it is likely that the drop rates are across all regions.

The officially announced drop rates are:

  • RARE - At least 1 rare or better in each pack. (This was already known).
  • EPIC - Average of 1 every 5 packs. (This implies that at least 4% of all cards are epic).
  • LEGENDARY - Average of 1 every 20 packs. (This implies that at least 1% of all cards are legendary).

The reported drop chances are slightly lower than the observed drop rates. This is likely an indication that the announcement drop rates have to be read as "at least 1 epic every 5 packs", and "at least 1 legendary every 20 packs".


Golden cards

Golden card data gathered prior to The Grand Tournament show significant differences from that gathered after. For this reason the below information is currently taken solely from the most recent study: HearthSim (August 2015).

Common Rare Epic Legendary
Percentage of total Regular 70.36% 21.60% 4.08% 0.94%
Golden 1.48% 1.27% 0.19% 0.07%
Count per 15,109 packs Regular 53,151 16,319 3,086 710
Golden 1,120 957 146 56

The following table describes the likelihood of getting at least 1 golden card in a given pack.

Common Rare Epic Legendary Any rarity
Probability of at least 1 golden per pack 7.4% 6.35% 0.95% 0.35% 15.05%

The following table describes the percentage of cards of each rarity which will be golden.

Common Rare Epic Legendary
Percentage golden 2.06% 5.54% 4.52% 7.31%
Rough probability 1 in 48.5 1 in 18.1 1 in 22.1 1 in 13.7

Duplicate protection[]

Duplicate protection in Hearthstone pack opening refers to the protection given to a player that prevents them from opening a card which the player has acquired more than one copy of (for legendaries) or more than two copies of (for commons, rares, and epics). Duplicate protection arises from the fact that normal game rules prohibit players from using more than one copy of a legendary card, or more than two copies of a common, rare, or epic card, in a typical playing deck. With duplicate protection, players are able to collect cards without having to worry about frequently getting useless duplicate and triplicate cards from card packs. Duplicate protection did not exist as a rule in Hearthstone before August 10th, 2017.

On June 22nd, 2017, Blizzard announced the brand new rule of duplicate protection would be implemented for legendary cards opened from card packs.[9] The announced duplicate protection rule and some additional rule changes to pack opening were officially implemented on August 10th 2017 with the launch of the Knights of the Frozen Throne expansion and were as follows:

  • When you open a Legendary, you are guaranteed to find a Legendary that you do not yet own a (non-golden or golden) copy of, unless you already own all Legendaries of the set.[10]
    • At this time, this meant that if a player owned all Legendaries in a set and disenchanted one of them, they were guaranteed to open the disenchanted Legendary in their next card pack containing a Legendary.
  • A single pack will never contain more than two copies of the same Common, Rare, or Epic card, or more than one copy of the same Legendary card.
  • Within each new set, you are guaranteed to get at least one Legendary within the first ten packs.

In-game notification of duplication protection after March 26, 2020

On March 17th, 2020, Blizzard announced that duplicate protection would be extended to all rarities when opening card packs, meaning that commons, rares, and epics would now be given triplicate protection, in addition to legendaries having duplicate protection.[11] The new triplicate protection rules and some additional rules of card tracking were officially implemented on March 26th 2020, about two weeks prior to the launch of the Ashes of Outland expansion, and were as follows:[12]

  • When a Legendary card is opened, you are still guaranteed to find a Legendary card that you do not yet own a copy of (non-golden and golden inclusive), but now only if you have not yet opened a copy of all Legendary cards in the set.
    • A Legendary card is still guaranteed within the first ten packs of an expansion.
  • When a Common/Rare/Epic card is opened, you are guaranteed to find a card of that rarity that you do not yet own two copies of (non-golden and golden inclusive[13]), but only if you have not yet opened two copies of all cards of that specific rarity in the set.
  • For tracking purposes, cards are marked as "collected" whenever a player acquires a card (golden or non-golden) through any means, and cards which are disenchanted still remain marked as being "collected".[14] This means that disenchanted Legendary cards, as well as disenchanted Common/Rare/Epic cards, are not guaranteed to show up in card packs after a player has "collected" all copies of cards of that rarity, but they will continue to show up as normal per the rarity distribution of card packs.[15] Once a card is marked as "collected", it is forever marked as such.[14] Tracking for such disenchanted cards began when the patch went live on March 26.[16]
  • Chadd Nervig also explained on Twitter that, for example, when a player has obtained 2 of all Commons, future Commons will be random but non-goldens will be ones which the player still hasn't gotten non-golden of, and goldens will be ones the player still hasn't gotten golden of.[17] This means that non-golden and golden cards are marked separately, as well as individually, for the purposes of card tracking.[18]
  • Additionally, outside of card pack openings, if players receive single-card rewards from elsewhere in the game, such as from Ranked rewards, these cards will also obey the duplicate protection rules afforded to card pack opening.

Notes[]

Purchasing options in the Americas region.

  • All types of card pack feature the same chance of producing cards of any given rarity, and of golden and regular versions.[19][20] This suggests that the internal process for the selection of each card functions by first determining a rarity, then randomly selecting a card of that rarity to produce. There is evidence suggesting that cards can have "predetermined rarities", experienced when opening packs "again".[21]
  • The contents of each pack are decided at random, at the time of opening.[22][23]
  • Buying options do not in any way affect the contents of packs.[24]
  • Players can only use 2 of each card in a deck (and only 1 of each Legendary), meaning additional copies of cards beyond these limits are of no value. When receiving unwanted cards from card packs, the disenchant option can be used to destroy unwanted cards in exchange for Arcane Dust, which can then be used to craft new cards. This process allows players to convert unwanted cards into more desirable options.
  • When opening packs, cards are displayed using the player's currently selected card back.

Strategy[]

There are many strategies to opening card packs to maximize their utility, depending on factors such as how much gold a player earns on average per day, if the player is new, etc.

Video of strategies for opening card packs (2018-10-10).
Video of the Classic set, questioning its power and if new players should buy it (2020-01-25).
Video of value of individual card sets, regarding the strength of the Classic set (2019-05-10).

Trivia[]

Concept art for the Goblins vs Gnomes card pack opening animation

The Goblins vs Gnomes card pack and its opening animation was originally designed by Jomaro Kindred,[25] and animated by John Zwicker.[26]

Videos[]

Gallery[]

1 pack to open

Picking up the pack

Placing it in the center

The pack bursting open...

…to reveal...

…5 brand new cards

Mousing over cards reveals their rarity

Another pack down

The player's current card back is used when opening packs

Gaining card packs from an external source

Variety pack: One each Legendary, Epic, Rare, Common and Golden Common.

Variety pack: One each Legendary, Epic, Rare, Common and Golden Common.

Patch changes[]

  • Ashes of Outland logo.pngPatch 17.6.0.53261 (2020-07-14): When random card back is selected, you will now see a randomized card back every time you open a pack, as well as every time you open the Crafting menu.
  • Ashes of Outland logo.pngPatch 17.0.0.44222 (2020-03-26): Duplicate protection applied to all rarities. (Read details)
  • Descent of Dragons logo.png Patch 16.0.0.37060 (2019-12-05): Wild card packs can now be purchased with in-game gold in the Shop.
  • Knights of the Frozen Throne logo.png Server-side patch (2018-08-10): Duplicate protection applied to Legendary cards.
  • Goblins vs Gnomes logo.png Patch 2.0.0.7234 (2014-12-04): Expert card packs have been renamed to “Classic” card packs.

References[]

 
  1. It is possible to open a pack with no Rares in it, if it has Epics/Legendaries instead: Imgur link. Tested in Patch 2.7.0.9166 (Tavern Brawl patch). Also see Card pack statistics#Notes.
  2. 2.0 2.1 Hearthstone Fireside Chat Goblins vs Gnomes. (2014-11-07). 
  3. 3.0 3.1 Ben Brode on Twitter. (2014-12-04). 
  4. Ben Brode on Twitter. (2015-08-15). 
  5. Ben Brode on Twitter. (2016-04-20). 
  6. Price adjustments for PC, Mac and Android - Battle.net Forums. (2017-03-10). 
  7. Ben Brode on Twitter. (2016-04-19). 
  8. Official Card Rarity Drop Probabilities from Packs. (2017-05-05). 
  9. Hearthstone Update: Upcoming Card Pack Changes. (2017-06-22). 
  10. Chadd Nervig on Twitter. (2020-04-20). 
  11. Blizzard Entertainment (March 17, 2020). Welcome to the Year of the Phoenix!. Retrieved on 2020-03-31.
  12. Blizzard Entertainment (March 26, 2020). Ashes of Outland – 17.0 Patch Notes – March 26. Retrieved on 2020-03-31.
  13. Chadd Nervig on Twitter. (2020-03-17). 
  14. 14.0 14.1 Liv Breeden on reddit. (March 18, 2020). Retrieved on 2020-04-07.
  15. Chadd Nervig on Twitter. (2020-03-18). 
  16. Chadd Nervig on Twitter. (2020-03-26). 
  17. Chadd Nervig on Twitter. (2020-03-26). 
  18. Tested by User:Aegonostic. Disenchanted a few commons and rares that only one copy had been opened, and the result is that the same card can be easily opened in subsequent packs, meaning that the cards are marked individually.
  19. Ben Brode on Twitter. (2014-11-19). 
  20. Ben Brode on Twitter. (2017-02-03). 
  21. Hearthstone Packs Hypothesis for "Predetermined Rarity" - Reddit. (2017-01-19). Retrieved on 2017-01-19.
  22. Ben Brode on Twitter. (2015-06-15). 
  23. Ben Brode on Twitter. (2016-08-29). 
  24. Ben Brode on Twitter. (2014-12-13). 
  25. John Zwicker on Twitter. (2014-12-09). 
  26. Yong Woo on Twitter. (2014-12-08). 
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