Description
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.
![Mystery Booster - Booster Box [Convention Edition] (2021)](http://cardshopnear.me/cdn/shop/files/MYBBox.webp?v=1716258445)