Playtest Cards and Conjure Rules in Mystery Booster Commander Edition

Two things in every Mystery Booster Commander Edition pack behave unlike anything else in the product: the playtest card, guaranteed one per pack and fenced into a single format forever, and the conjure mechanic those cards lean on, which needed six dedicated paper rules before it could work at a physical table. Both are documented in the official release notes. This page covers both, because at the draft table they arrive together. The wider rule landscape is on the game changes overview, and the physical slot these cards come from is mapped in What's Inside Mystery Booster Commander Edition. Last verified on October 20, 2026.

The 121 Playtest Cards

What They Are

Every MBC pack contains exactly one playtest card in its final slot, and it is always nonfoil. The sheet is not new: these are the 121 playtest cards introduced with Mystery Booster 2, the same set carried into this product. One per pack, 24 packs per display — a display hands you 24 looks at the sheet, with repeats.

The appeal is exactly what the name promises: playtest cards exist to show the design space between "real card" and "idea on a whiteboard" — cards captured in a raw design state. In MBC they also serve a structural purpose: they are the wildest variance source in every draft. Nothing else in the pool plays like them, and nothing else in the pool can leave the format.

Where They Are Legal

This is the hard boundary, stated plainly in the release notes: playtest cards are legal only in Mystery Booster Commander Limited. Not Commander. Not Legacy, not Vintage, not any Constructed format — and per the release notes, never will be. They share this fence with the 10 acorn-stamped Alchemy cards from collector numbers 61–70, the other group in the product that exists on the MBC-only side of the legality line. The full timeline for every other group — new cards hitting Commander on November 13, 2026 and eternal formats on January 1, 2027 — is on the format legality dates page.

The practical consequence at the draft table: a playtest card is a pure Limited pick. Its value is what it does in your 60-card deck this weekend, full stop — there is no "hold it for a constructed deck later," because there is no later.

The Conjure Rules for Paper

Several of these cards lean on conjure — putting a card into the game that you did not bring, from outside your deck and collection. On MTG Arena the game engine just materializes the card; on paper, the release notes had to write actual table rules, and they wrote six.

Rule 1: Gatherer Is the Version of Record

Conjure cards are played as their current official Gatherer text reads. Whatever shorthand, memorized wording or early discussion copy circulates, the Oracle text in Gatherer is what governs. This mirrors how Magic handles all card text — the printed card is a delivery mechanism, the database entry is the rules object — and it matters here because conjure effects touch zones and ownership in ways where exact wording is load-bearing.

Rule 2: Conjured Cards Are Not Tokens

A conjured card is a card, not a token. That single sentence carries a stack of rules weight: effects that care about cards, that move cards, that count cards or that exile cards apply to conjured cards the way they apply to normal ones and not the way they apply to token objects. Do not sleeve a proxy slip and call it a token; it is not one.

Rule 3: No Ownership or Legality Required

You do not need to own a physical copy of the card being conjured, and the card does not need to be legal in the format. The whole point of conjure on paper is producing game objects your collection and the format's card pool never contained — so neither is a prerequisite. MBC Limited is the venue precisely because it can define its own contents.

Rule 4: The Conjured Card Belongs to the Recipient of the Instruction

Ownership of the conjured card goes to the player who received the conjure instruction. When an effect tells you to conjure a card, the resulting object is yours — regardless of whose effect, whose card or whose pack produced the instruction. In a four-player game this rule settles every "whose is that, exactly" dispute before it starts.

Rule 5: Conjured Cards Leave at the End of the Game

Conjured cards must be removed from your deck at the end of the game. They enter the game as game objects; they do not become part of your decklist. After the match, the physical representation comes out and goes back to being whatever blank or spare it was. Between this rule and Rule 4, a conjured card's entire lifecycle is bounded by the game that created it.

Rule 6: Hidden Zones Need an Indistinguishable Face-Down Card

When a conjured card is put into a hidden zone — your library being the obvious case — it must be represented by a face-down card that cannot be distinguished from the other cards in that zone. Same backing, same sleeves, no marks, no tells. If a conjured card in your library could be identified by feel or thickness, the zone stops being hidden and the game's information structure breaks.

Putting the Two Together

The playtest slot plus the conjure rules add up to the most "unplugged tournament" corner of MBC: cards that exist legally only in this format, some of which generate other cards on the spot under six rules written so a physical table can process them. Bring spare sleeved blanks if you are playing anything conjure-adjacent; Rule 6 is the one that catches unprepared players mid-game.

For everything surrounding this corner — slot odds, the rest of the pool, and the construction rules you build your 60-card deck under — see the What's Inside breakdown, the partner and color identity changes, and the beginner's guide.

FAQ

Are playtest cards legal in Commander?

No. Playtest cards are legal in Mystery Booster Commander Limited only, and per the official release notes they will never be legal in any Constructed format.

Are the MBC playtest cards the same as Mystery Booster 2's?

Yes — the 121-card playtest sheet is shared between the two products. Each MBC pack contains one, always nonfoil.

Is a conjured card a token?

No. The paper conjure rules state explicitly that conjured cards are cards, not tokens, and they interact with card-based effects accordingly.

Who owns a conjured card in a multiplayer game?

The player who received the conjure instruction, per the release notes. It must be removed from the deck at the end of the game.

Do I need to own copies of cards I might conjure?

No. Ownership of a physical copy is not required, and the conjured card does not need to be legal in the format. You will, however, need an indistinguishable face-down card if the conjured card goes into a hidden zone such as your library.