Each pack comes with five random cards.
Your chance to receive a particular card depends on its rarity: You’re guaranteed to receive at least one card of rare or better quality per pack. Each card in the pack also has a chance to upgrade to a “Golden” version of the same card.
Disenchant those extra cards in your collection to receive arcane dust, the building block used to construct Hearthstone cards. You can then use this dust to craft the cards needed to complete one or more of your decks or your overall collection.
Once you’ve selected which hero you want to play as, there are three types of cards you can build your deck with in Hearthstone: spells, weapons, and minions. Each card falls into either the “basic” or “expert” card set.
Minions are the ones who assist and fight on behalf of the hero to inflict damage to your opponents hero's health.
Spells are cast with various abilities and then discarded after use. They can be used to inflict damage, draw additional cards, give an ally additional attack and/or health, or even restore health to your hero.
Weapons are attached to your heroes to increase their "Attack".
Basic cards are the “starter” cards that form the foundation of each hero’s class, and are earned each time you play a game (you can have up to two of every basic card in the game in your collection).
Expert cards are cards that can only be found in card packs or created using the crafting system (certain achievements grant them as well). They’re distinguished by their rarity—common (white), rare (blue), epic (purple), or legendary (orange). Generally the rarer a card is, the more complex it is, often providing you with new strategic options. You can have any number of expert cards in your collection, though only two of any common, rare, or epic card, and one of any legendary card, can be placed in a deck. Both basic and expert cards have important roles to play in all decks, regardless of whether you’re just starting out or are a Hearthstone grandmaster.