A set of Boosterbox from The Brothers' War contains 30 set of boosters. A booster set contains 14 Magic: the Gathering cards from The Brothers' War of which:

- 1 Rare or Mythic rare.
- 1 Retro or Schematic artifact card.
- 1 Foil card, can be any rarity.
- 2 Wild cards*
- 3 Uncommons.
- 3 Commons.
- 1 Basic land or mecha basic land with a chance of foil.
- 1 The Brothers' War Art Card.
- 1 Token, advertising card, helper card or a card from The List**.

*The wildcard slot can contain any rarity including borderless, Transformers, retro or schematic artifacts, Jumpstart or Commander cards.

**The List is a curated list of cards from the history of Magic: the Gathering.