There’s nothing quite like opening up a new card pack in Hearthstone only to find multiples of the same rare you already have and didn’t want the first time. That’s why the game is changing how card packs work to make collecting a set easier. First and foremost, players will no longer have to worry about getting duplicate Legendary cards until they already have all of the Legendary cards collected; if you get a Legendary, it’ll be new. Second, you’re assured a Legendary within the first 10 card packs you open for each given set.
Thirdly, players will no longer get more copies of a card in a given pack than can be used in a single deck, so you won’t find yourself flooded with copies of cards you do not and will not ever need. There’s also a limited-time promotion on card packs, offering more packs for the same price, which seems like a perfect motivator if you’re still trying to get one or two elusive options.