Each Phyrexia: All Will Be One - Collector Booster Box contains:
• 12 Phyrexia: All Will Be One Collector Booster Packs
• 15 Magic: The Gathering Cards + 1 Traditional Foil Double-Sided Token
• 5-6 cards of rarity Rare or higher per Booster Pack
• 2-5 Uncommons, 4-7 Commons, and 1 Land cards per Pack
• 8-10 Traditional Foil card 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