12 cards per booster 

Phyrexia: All Will Be One Set Booster Packs are designed for a fun pack-opening experience. Glory to Phyrexia — resist the Phyrexian invasion or forfeit your flesh to join them in perfection!

Set Booster Rarity Breakdown:

• 1 Rare or mythic
• 1 Foil card of any rarity, including an opportunity to open Phyrexia: All Will Be One Commander cards, Jumpstart Booster rares, borderless rares or mythics, or showcase commons or uncommons
  
• 2 Cards of any rarity, including an opportunity to open Phyrexia: All Will Be One Commander cards, Jumpstart Booster rares, borderless rares or mythics, or showcase commons or uncommons
• 1 Showcase rare or mythic
• 3 Uncommons
• 3 Commons
• 1 Basic Land
• 1 Token or card from "The List"

"THE LIST"— CARDS FROM MAGIC'S HISTORY. 1 in 4 Set Boosters includes a card from "The List"—a pool of reprints, ranging from powerful to flat-out wild.