Boros Preview Pack (white/red), inside, you'll find five normal Guild of Ravnica boosters, and a special "classified" booster. This contains one of the eight rare or mythical rare cards that will be your Preview card, as well as a stack of cards to give you a head start in building a deck in both colors for that guild. There are some themes in the boosters built around the rare/mythical rare card you get (not to mention the mana stabilization cards!) so this should help you get the most out of your deck.
Rule, Educational Sheet ... 6 Files Available6 Files Available
Contents of the box : 6 boosters of 15 cards, 1 rare or mythical card, 1 Spindown health points counter.