Brothers War Set Booster Box includes 30 Set Booster Packs.
Each set booster includes 12 Magic cards and 1 Art Card, Token or Advertising Card, or "The List" card (special card from Magic History).
25% probability of appearance).

The magic cards includes: 1 to 5 rare or higher card combinations, 3 to 7 Uncommons, 3 to 6 Commons, and 1 Land. With a 20% probability of foiled land cards instead of basic land cards.
Art cards are 10% probably "Signature Edition" appear. Less than 1% of the probability of less than 1% reveals a foil borderless version of the mythical rare planeswalker.