Mystery Booster Commander Edition
Rulebreaker MTGBreak the Rules.
Build the Impossible.
Discover the Rulebreaker commanders, explore unexpected deckbuilding possibilities, and learn the official rules — from Mystery Booster Commander Edition.
Explore RulebreakersFormat legality note: New-to-Magic cards from Mystery Booster Commander Edition become Commander-legal on 2026-11-13. Reprinted cards use their existing format legality. Read the rules.
Interactive Explorer
Every Rulebreaker commander
Select a commander to see the specific rule it breaks, what becomes possible, and curated deck ideas.
Featured Discoveries
The most surprising exceptions
A closer look at the deckbuilding rules these commanders bend the furthest.
You may run Angel creature cards of any color identity, and any basic land cards, in a deck whose color identity is otherwise white.
Instant and sorcery cards in your deck may include one additional color of your choice outside blue, and you may run any basic lands.
You may run Aura cards of any color identity, and any basic lands. The Unluckiest Planeswalker can be your commander.
You may run any land cards, including nonbasic and color-producing lands of any type, in a red-green deck.
How Rulebreaker Works
One rule, broken cleanly
Rulebreaker is an ability word that lets each commander bend exactly one Commander deckbuilding rule.
Rulebreaker is an ability word
Rulebreaker has no rules meaning on its own. It is printed in italics before reminder text that spells out each commander's specific exception. The exception is only what the reminder text says — nothing more.
It only applies while the card is your commander
A Rulebreaker exception is active only when that card is your commander. The same card in the 99 (or anywhere else) grants no deckbuilding exception.
It changes deckbuilding, not gameplay
The exception is a pregame deckbuilding rule. It does not change a card's color identity, and it has no effect on how spells and abilities work during the game.
Each commander breaks one specific rule
Every Rulebreaker commander bends exactly the restriction its reminder text names — a card category, a color, or a deck-size rule. No Rulebreaker removes all Commander restrictions.
Governed by the Commander rules
Commander deck construction is defined by the Comprehensive Rules (section 903). Rule 903.5e governs the pregame deckbuilding exception that Rulebreaker commanders rely on. The official sources below are authoritative.
FAQ
Frequently asked questions
Practical answers about color identity, deck size, commander requirements, and format legality.