Mystery Booster is two different products sold under one name, and buying the wrong one is the most common mistake people make with it. The Convention Edition puts a black-and-white playtest card in the last slot of every pack. The Retail Edition replaces that slot with a foil. Same set code, same 15-card structure, completely different reason to buy. Here is how to tell them apart, what each box contains and where prices sit in September 2026.
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| Release dates | Convention Edition November 7, 2019; Retail Edition March 13, 2020; Convention Edition reprint August 2021 |
| Set code | MB1, with playtest cards tracked separately as CMB1 |
| Set size | 1,694 cards spanning Magic's history, plus 121 playtest cards |
| Booster types | Mystery Booster only, 15 cards, 24 packs per box |
| Key difference | Convention Edition has a playtest card in the last slot; Retail Edition has a foil instead |
| Booster box (Sep 2026) | $215-$460 depending on edition and printing |
Twenty-four packs of 15 cards. The first fourteen cards follow the same structure in both editions: two commons or uncommons of each colour, one multicoloured card, one artifact or land, one rare or mythic rare and one card in a pre-M15 frame. The fifteenth card is a playtest card, drawn from a pool of 121 black-and-white designs that look like internal Wizards prototypes pasted over existing card frames. Convention Edition boxes were sold at MagicFests and conventions and trade in the $300 to $460 range in September 2026.
In August 2021 Wizards distributed a limited Convention Edition reprint to WPN stores after conventions shut down. Two playtest cards received new artwork, 24 reprints from specific artists were removed and 24 others increased in frequency. The clearest tell is that the new playtest cards lack the planeswalker symbol the originals carry. These boxes trade around $340 to $400, with TCGplayer mid near $370.
Twenty-four packs of 15 cards, with the playtest slot replaced by a foil card drawn from a separate 121-card foil pool that does not appear in the main set. This is the box general retail sold from March 2020, and it is the one most listings mean when they say "Mystery Booster box" without qualification. Retail boxes trade at $215 to $460 with a market price near $358 and TCGplayer near $377.
Single packs run $12 to $22 for Retail and $18 to $30 for Convention Edition. A Convention pack is a genuinely fun single-pack purchase because the playtest card is guaranteed and often absurd; a Retail pack is a chaos draft pack with a foil.
Cases are four boxes. Sealed Convention Edition cases are scarce because the product was distributed at events rather than through normal retail channels, and they carry a meaningful premium.
Mystery Booster has no Booster Fun treatments in the modern sense. There are no borderless, showcase, extended art or serialized cards. What it has instead is breadth: 1,694 cards from across Magic's history in one draftable pool, which is the entire point of the product.
The value comes from Commander staples appearing at ordinary rare rates. Mana Crypt is the card that can pay for a box on its own and sits around $190. Rhystic Study, Demonic Tutor, Teferi's Protection, Recruiter of the Guard, Kess Dissident Mage and Force of Negation fill out the top end. Because the set draws from so many sources, the rare slot is genuinely random in a way no other Magic product is - which cuts both ways, since most rares in a 1,694-card pool are worth very little.
The playtest cards are their own market. They are not legal in Constructed formats and can only be used in casual and chaos draft play, but several carry real collector prices, and the 2021 reprint variants have their own following among completionists.
Mystery Booster is the rare Magic product where the sealed argument and the play argument point the same way. Both editions are long out of print, neither has been reprinted since 2021, and the chaos draft format the product creates is one of the best casual experiences in the game. Boxes have roughly doubled from their original pricing, and Convention Edition boxes are genuinely scarce because they were never sold through normal retail.
The honest limits are worth stating. Box expected value sits well under current box prices in both editions - the mtggoldfish figure for the 2021 Convention box is around $274 against a $370 ask - so opening to profit is a losing bet unless you hit Mana Crypt. Liquidity is also thin; these boxes sell roughly once a week, which means slow sales and wide spreads. And because the two editions look similar on a listing thumbnail, there is real risk of paying Convention money for a Retail box. Buy a box to draft with friends, which is what it was built for, and treat the appreciation as a pleasant side effect rather than the reason.
Start with edition verification, which matters more here than anti-counterfeiting. Convention Edition boxes and packs carry different artwork and labelling from Retail; check the box panel text and the pack art against a known image before paying a Convention premium. For the 2021 reprint, the absence of the planeswalker symbol on playtest cards is the definitive tell, though you cannot check that without opening a pack.
For tampering, the standard checks apply: tight evenly tensioned shrink with a single clean factory seam, no adhesive residue at the flaps, no crushed or lifted box edges, and no shifting when tilted. Loose packs are the bigger problem. Mystery Booster packs are weighable, Mana Crypt is a known target, and Convention packs in particular are frequently sold individually by people who have already searched them. Buy packs only from a box you watched open or a shop with a sealed-product history. A sealed case remains the safest purchase.
Local shops that received the 2021 WPN allocation sometimes still have boxes at old pricing, and a store is the only place you can confirm the edition in person, so start with the card shop directory. Card shows are the best venue for Convention Edition product and loose playtest cards. Online, these searches separate the editions cleanly:
Twenty-four packs of 15 cards, in both the Convention and Retail editions.
The first 14 cards are the same. The Convention Edition's last card is a black-and-white playtest card; the Retail Edition's last card is a foil from a separate 121-card pool.
No. Playtest cards are not legal in Constructed formats. They can be used in casual play and in the chaos draft format the product was designed around.
In September 2026 Retail boxes sell for $215 to $460 with a market price near $358. Convention Edition boxes run $300 to $460, and the 2021 reprint sits near $370.
No. Mystery Booster is a reprint product. Its cards remain legal only in the formats they already occupied, and playtest cards are not Constructed legal at all.
No. The Convention Edition ran in 2019 with a limited 2021 reprint, and the Retail Edition ran in 2020. Neither has been printed since.
Prices in this guide were last reviewed 2026-09. Live eBay listings above update daily.