Mystery Booster Commander Edition Update Bulletin

The most notable game mechanic shift in this rules bulleting involves double-faced cards and meld cards. Back in 2023, rules managers grouped meld cards underneath the broader umbrella of double-faced cards so that search cards could find them seamlessly. However, recent card designs eroded the mechanical similarities between those groups, making the combined classification counterintuitive for judge calls and standard gameplay.

To fix this issue, the rules team established a standalone section specifically for meld cards, removing them from the rules section covering double-faced cards. As a direct result, cards that specifically check for double-faced objects - such as Overgrown Pest - will no longer apply to or interact with meld cards. Beyond this specific reclassification, the entire framework for transformed, converted, and modal double-faced cards was consolidated into a cleaner format to make rule references easier to find.

Following up on previous announcements regarding confusing card wording, the rules team officially issued revised Oracle text for Tolabow, Loch Rascal. The original printed rulebreaker text produced unintuitive deckbuilding scenarios that were difficult for players to parse during format setup.

The updated text specifically references color identity to streamline how deckbuilding rules apply when using the legend as a commander. Under the revised rulebreaker template, if Tolabow, Loch Rascal serves as your commander, your deck's instant and sorcery cards can include one chosen color outside your commander's normal color identity, and you may include any basic lands.

The comprehensive rules now officially account for rulebreaker abilities on cards, granting them the legal framework to function prior to the start of a match. This ensures that unique commander abilities operate properly during the deckbuilding and pre-game setup phases. Additionally, the term rulebreaker has been formally added to the official catalog of ability words.

General timing rules were also updated to clarify spell resolution choices. When an effect grants a player permission to cast multiple spells while resolving a single spell or ability, that player is explicitly allowed to choose the order in which those spells are cast.

This rules refresh formally introduces seven new planeswalker subtypes to the game: Arzakon, Dyfed, Feroz, Greensleeves, Sifa, Thomil, and Worzel. Furthermore, whenever an effect instructs a player to name a card, the rules now explicitly state that the player can pick the name of the Adventure spell found on an adventurer card.

Finally, several administrative cleanup steps were applied to obscure interaction rules. The rule preventing weird simultaneous entry choices - historically illustrated by cards like Sutured Ghoul entering from the graveyard alongside other objects - was broadened to handle items entering or leaving any zone rather than just the battlefield. The rules team also updated cross-references regarding non-Siege battles sitting at zero defense counters.