Wizards of the Coast
Booster Box [Convention Edition 2021] - Mystery Booster (Magic: The Gathering)
Each booster box contains 24 Mystery Booster Convention Edition 2021 Booster Packs. Each convention-exclusive Mystery Booster pack will contain fifteen cards: fourteen from the gigantically awesome main set, and one Research and Development Playtest card. Please keep in mind that all Playtest cards will have the following warning on them: TEST CARD - Not for Constructed Play.