: Focus on cards from a single release (e.g., Whizbang's Workshop ).
: These are available for purchase in the official Battle.net shop or in-game using real money or in-game gold .
: If you want a specific card, you don't buy it; you "craft" it using Arcane Dust . You get dust by disenchanting cards you don't want or by receiving it as a reward .
: Contain cards from any set currently in the Standard rotation .
: These offer more cards to players with smaller collections to help them "catch up" quickly .
: Buying old adventures (like Curse of Naxxramas ) rewards you with specific, guaranteed cards as you complete the missions .