EachMarch of the Machine-Set BoosterPack contains:

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
3-8 Uncommons, 2-7 Commons, and 1 Land cards per Pack
1 Traditional Foil card and Art Card in each Booster Pack