While you'll still get Rise of the Bloodborn cards by purchasing orbs (card packs) unique to the set, these orbs function a little differently than the ones for the classic and Shim'zar sets. Instead of paying 100 gold for five random cards, a Bloodborn orb will cost 300 gold and contain three copies of three different cards, so nine cards total. None of the cards from this set are craftable or disenchantable, and once you've acquired a certain card, you won't ever see it in an orb again.