35-CARD BOOSTER PACKS. Theme Boosters are 35-card booster packs full of cards based on a single theme. There's a different pack for each color, and one based on the "party" mechanic.
CONTENTS: Each theme pack contains 35 Zendikar Rising cards, each based on a single theme (33¬–34 commons/uncommons; 1–2 rares or mythic rares). There's 1 Theme Booster for each of Magic's 5 colors, and 1 based on the "party" mechanic.