Wizards of the Coast will release Mystery Booster, a booster set for Magic: The Gathering inspired by the Chaos Draft and Cube formats, through the WPN on March 13, 2020.

The Mystery Booster set was previewed as a Convention Edition at MagicFest Richmond last week. The Convention Edition, which is now available at MagicFests and convention events moving forward, featured booster packs with 15 cards total: 14 reprints from a 1,694-card set and 1 card from a "surprise" selection of cards, which could be a R&D Playtest card or other another mysterious insert.

The WPN version of the Mystery Booster set will also include 15 cards, 14 of which will be from the gigantic main set. However, instead of the "surprise" card, they will replace that card slot with a foil card from a list of 121 possible foil cards which are not included in the 1,694-card main set. The change from the Convention Edition is attributed to "making the Draft experience more repeatable."   

Magic: The Gathering was recently inducted into the National Toy Hall of Fame (see "'Magic: The Gathering' Inducted into National Toy Hall of Fame").