Manufacturer information:
Each Phyrexia: All Will Be One Set Booster contains 12 Magic cards, 1 Art card, and 1 Token/Ad card or card from “The List” (a special card from Magic's history or Universes Within card—found in 25% of packs).
Every Booster includes a combination of 1–4 card(s) of rarity Rare or Mythic Rare and 3–7 Uncommon cards, 3–7 Common cards, and 1 Land card. A Traditional Foil Land replaces the Basic Land in 20% of Set Boosters and a Foil-Stamped Signature Art card replaces the Art card in 10% of Set Boosters. Foil Mythic Borderless Planeswalker in < 1% of Boosters.