Each Brothers' War - Set Booster Box contains:
• 30 March of the Machine Set Booster Packs
• 12 Magic: The Gathering Cards + 1 token/ad card or Helper card or a Card from "the List"
• 1-5 cards of rarity Rare or higher per Booster Pack
• 1 Traditional Foil card and Art Card in each Booster Pack
• 1 Retro Border Artifact in each Booster Pack
Starting with The Brothers' War, Buy-a-Box Promos will only be available for in-store pick-ups and purchase while supplies last as stated in Wizards of the Coast's article here.
Does Not Contain Any Promotional Material