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).
12 Magic: The Gathering cards per booster
Best MTG booster to open just for fun
1–4 cards of rarity Rare or higher in every pack
Traditional Foil card and Art Card in every pack
Glory to Phyrexia—resist the Phyrexian invasion or forfeit your flesh to join them in perfection