Shop

Summary
The shop. Note how it's Epic Sunday, so there are twice as many cards, and how there are Legendary cards available occasionally (like now) since the player is in the Legendary Arena.]]
 * The Shop includes Cards, Treasure Chests, Gems, and Gold.
 * The Shop is unlocked at Goblin Stadium (Arena 1).[[File:EPIC SUNDAY SHOP.png|thumb|391x391px|

Cards

 * The selection of Cards in the shop changes daily.
 * Below Arena 9, this selection is chosen from all non-Legendary cards unlockable from your Arena, including those you have not unlocked yet.
 * At Arena 9, Legendary cards will occasionally show up in the shop, again including those you have not unlocked yet.
 * You can buy several of the same card, but the price increases linearly with each subsequent purchase.
 * 3 random Cards are shown every day, except Sundays. The cards can be of different rarities or even occasionally having 2 of them of the same rarity. (i.e. 2 epics and 1 common)
 * On Sundays (called Epic Sunday), 6 different Cards are shown, instead of 3 different cards.
 * In a daily rotation, each player can buy up to 100 Commons, 50 Rares, 10 Epics, or 3 Legendaries, at increasing prices once one of the respective card rarities are bought. (If a legendary card shows up in the shop, one of the other rarities will not, excluding Sundays.)
 * The prices of common cards start at 2 Gold, the prices of rares start at 20 Gold, the prices of epics start at 2,000 Gold, and the prices of legendaries start at 40,000 Gold.
 * The prices for the various rarities of cards purchased increases, represented by the following equations: Commons, y=2x gold, Rares, y=20x gold, Epics, y=2,000x gold, and Legendaries, y=40,000x gold, where x is the number of the card being purchased, and y being the cost of the card.
 * The total cost to buy the first x cards for each rarity is given by the equations: Commons, y=x(x+1)(2,4,6,8,10 etc.) gold; Rares, y=10x(x+1)(20,40,60,80,100 etc.) gold; Epics, y=1000x(x+1)(2000,4000,6000,8000 etc.) gold, and Legendaries, y=20000x(x+1)(40000,80000,120000) gold, where y is the total cost and x is the number of cards bought.
 * Legendary cards don't show up at the shop below Arena 9, so you can only obtain them by opening Chests from Arena 4 and above.
 * All of the cards of one type can be bought at once if the player has enough Gold to do so.

Treasure Chests

 * You cannot buy Wooden, Free, Silver, Golden, or Crown Chests.
 * The arena number chest you can get corresponds with your current Arena.
 * The price for each varies according to your current Arena.
 * Different chests give you different rewards. Super Magical Chests have a higher chance of getting legendaries than Magical Chests, which in turn have a higher chance of getting some than Giant Chests.
 * The better the Chest is, the better the rewards (more gold, more cards, and higher rarity of the cards) will be.
 * The exception is Giant Chest, which drops approximately 3 times as much gold as the Magical Chest. However, the Magical Chest drops a variety of cards (various Commons, Rares and some Epics, and possible Legendaries.). On the other hand, it is very uncommon to get cards with a higher rarity than Rare in a Giant Chest, instead you get a large amount of 1-2 Commons (80+ combined or higher dependent on Arena) and a good amount of the same Rares (10-25 partially dependent on arena).
 * The Giant Chest can potentially drop better loot than the Magical Chest. However, the Magical Chest is much more reliable.

Epic and Legendary Chests

 * Unlike Giant, Magical, and Super Magical Chests, Epic and Legendary Chests are not always available in the Shop. They have a chance of appearing as a special offer on any given day.
 * Only one chest will be available from each special offer, but unlike Arena Packs, Epic and Legendary Chest special offers can re-appear and be purchased more than once.
 * Epic Chests cost 10,000 Gold.
 * Legendary Chests cost 500 Gems.

Gems

 * The price of Gems depends on the player's country.
 * There are 6 Gem bundles available to be purchased.

Gold

 * There are 3 Gold bundles available to be purchased.

Value
This table summarizes the value in USD of various purchases in the game.

*The bucket and fistful of Gems leave the player with 20 Gems after converting the full amount to gold. **These prices are listed at the Gem cost to buy them at Arena 7.

Arena Packs

 * Arena Packs are special offers that cost real money to buy.
 * There are 7 different Arena Packs, one for each Arena (other than Arenas 1 and 2). The Arena Pack that appears in your shop corresponds to your current Arena; for example, if you are in Arena 4, the offer will be an Arena 4 Pack.
 * They appear for the first two days after you reach a new Arena, and afterwards they will appear once a week if they are not purchased.
 * The Arena Packs are one-time special offers, so if you purchase an Arena Pack belonging to a certain Arena, you will never see it again.
 * There is a 25% chance that an Arena Pack from a lower Arena is available, as a means of variety.
 * Each Arena Pack contains a fixed amount of Gems and Gold, as well as a fixed type of Chest.
 * The Chest received contains cards from their Arena and below, and opens immediately.

History

 * On 29/2/16, the February Update changed the Silver and Golden Chests available in the shop with Giant and Super Magical Chests.
 * On 3/5/16, the May Update changed the cost rate of all cards in the shop to a linear growth (from exponential growth) and made occasionally possible to buy Legendary Cards for the players that have reached the Legendary Arena (Arena 9). In addition, it redesigned the shop, adding a shopkeeper holding an animated clock.
 * After this update, it is also possible to have two Commons, Rares or Epics in the shop on a single day.

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