Rulebreaker in MTG: Rules, History, and Best Cards

Last updated on August 5, 2026

Tolabow, Loch Rascal | Illustration by Brian Valeza

Mystery Booster Commander Edition is a set made for in-pod Commander drafting, which is quite a daunting mission. Not only do you need to draft legendary creatures, but also a good density of creatures and removal spells that match your commander’s color identity, besides mana fixing and the like.

In the past, mechanics like partner and background were designed to make this task a little more flexible, but rulebreaker is the latest Commander mechanic to tackle this. Instead of focusing on the game and how to interact with multiple players rather than just one, here we have ways to break the rigid deckbuilding aspects of EDH.

Let’s dive in and see how badly the existing rules for Commander decks will be broken, shall we?

How Does Rulebreaker Work?

Maular, the Next Evolution | Illustration by Jesper Ejsing

Rulebreaker is an ability word that appears on legendary cards and modifies the deckbuilding rules of your Commander deck if you select the rulebreaker as your commander. The ability has no effect outside of the command zone.

Most of these allow you to play off-color cards or basics so long as you adhere to a specific theme or card type spelled out by your rulebreaker, though there’s one rulebreaker that isn’t associated with color changes at all.

Rulebreaker was designed to help make a functional deck in a Commander Draft, though its implications obviously extend beyond the Mystery Booster Commander Edition product it appears in.

The History of Rulebreaker in MTG

Rulebreaker was officially created as a mechanic in 2026 (not considering previous playtest cards) in Mystery Booster Commander Edition, present on eight cards total. Tolabow, Loch Rascal was the first spoiled card with the mechanic.

This is a very specific mechanic designed to help facilitate Commander Drafts, so I doubt we'll be seeing it much outside of similarly focused Commander products.

Are Rulebreaker Cards Legal in Commander?

Rulebreaker cards from Mystery Booster Commander Edition will be legal in Commander, and you can play them in the 99 of your EDH decks or design a deck around them to fully utilize the rulebreaker mechanic.

However, the existing rulebreaker playtest cards can’t be used in Commander decks unless your playgroup authorizes or allows you to play them in a pregame Rule 0 discussion.

How Many Rulebreaker Cards Will Mystery Booster Commander Edition Have?

There will be eight rulebreaker cards, and they were designed with help from the Commander Format Panel to ensure things stay stable in the format.

Does Rulebreaker Change Your Commander’s Color Identity?

No, rulebreaker doesn’t change your commander’s color identity.

Let’s look at Tolabow, Loch Rascal. It’s blue, and let’s say I choose black as a color to play instants and sorceries. This deck could run Doom Blade, Mystical Teachings, and Recoil, as well as Swamps and any other kind of basic land.

However, even with the addition of these black cards to your deck, your color identity remains mono-blue, so your Command Tower could not produce black mana, for example.

Gallery and List of Rulebreaker Cards

Mystery Booster Commander Edition Cards

• Seluma, Light of Aysen
• Tolabow, Loch Rascal
• Valko Indorian
• The Unluckiest Planeswalker
• Maular, the Next Evolution
• Whtz, the Bibliophile
• Grizzlegom, Hurloon Hero
• The Everforger

Playtest Cards

• Valko Indorian, Researcher
• Hadran, Naya Sunseeder
• Arvad of the Weatherlight
• Daxiver, Izzet Eletromancer

All Rulebreaker Cards Ranked

#8. The Unluckiest Planeswalker

As fun as it is that they finally made a card for The Unluckiest Planeswalker, his unlucky streak shall continue, because this just isn’t a very strong commander. Auras has never been a particularly robust strategy, and planeswalker commanders are easy to kill. I get that you’re supposed to play with curses, but that doesn’t seem all that powerful either. Good lower Bracket material, but not super powerful.

#7. Valko Indorian

Two of the rulebreakers are focused on creature types, with Valko Indorian caring about the lesser of the two. Unlike the other typal rulebreaker, you could’ve already played 5-color Phyrexians with Omnath, Locus of All, though I suppose this is a lord if you want your commander to specifically care about Phyrexian creatures. Lifelink and menace are good, sure, but Valko offers very little aside from just letting you stuff a bunch of praetors in one deck, which was never off the table anyway.

#6. Tolabow, Loch Rascal

You’d think with as much hubbub as Tolabow, Loch Rascal caused that it’d be some busted commander, but it’s really nothing special. It goes +1 on colors for instants and sorceries, and it’s basically just a build-your-own 2-color Monastery Mentor. This is an incredibly tame card that was thankfully errata’d to make way more sense than it initially did.

#5. Maular, the Next Evolution

Very fun, but asking you to pack a deck full of 7-mana spells is kind of the opposite of good deckbuilding. Of course, you’ll want to find cheaty creatures that fit the bill, but we’re talking one of the highest-curve decks you could possibly make. This is old school Commander, and I respect it, but it’s not optimal, and that’s okay. I do like that Maular, the Next Evolution just domes people for 20 when it attacks.

#4. Seluma, Light of Aysen

Angels are very popular, so it makes sense that they’d want to use rulebreaker to give people a way to finally build 5-color angels without resorting to Morophon, the Boundless. And that’s about the extent of Seluma, Light of Aysen, just a new 5-color option for an immensely popular creature type. Definitely enough to give people a breath of fresh air from Giada, Font of Hope for a bit.

#3. Grizzlegom, Hurloon Hero

Aside from letting you assemble some land-based combos that you’d normally be unable to do with a Gruul commander (), Grizzlegom, Hurloon Hero is also just a value machine if you cram as many land types into your mana base as possible. Shocks, Turbulent lands, triomes, whatever, the more land types the better. It’s still a non-hasty 7-drop with an attack trigger, but a fun domain-style commander worth building around.

#2. The Everforger

I’m not sure what the best build for The Everforger is, but it has a very strong cast trigger, whether you lean into artifact creatures, equipment, or both. This is a very malleable commander with a strong ability, and I imagine we’ll be seeing some creative takes on how to build it.

#1. Whtz, the Bibliophile

This isn’t a power level pick for #1, but Whtz, the Bibliophile does something that literally no other card in the game does. We’ve never seen anything break the 100-card structure of Commander in this way, which opens the door to some really goofy deckbuilding opportunities. Battle of Wits, Hare Apparent, and Yorion, Sky Nomad are some of the obvious builds that come to mind when you ignore the deck size limit, and Whtz isn’t all that terrible as a creature in play, either.

Tolabow Rulebreaker Errata

The original printing of Tolabow, Loch Rascal was worded in such a way that you could skirt color identity rules so long as the cards you were adding from another color all shared that color in their mana costs. For example, it would’ve been possible to choose red as your second color and play Ancient Grudge, but choosing black wouldn’t allow you to play Mystical Teachings. It was extremely counterintuitive and was cleaned up because of it.

The reworked text clarifies that the cards added to your deck via rulebreaker basically extend your color identity by one, which was the original intention of the card.

Wrap Up

The Everforger | Illustration by Chris Seaman

The very name “rulebreaker” sounds like something that would mess up Commander, but that won’t be happening, at least not with this first batch of cards. With the exception of Whtz, these don’t let you do anything fundamentally different than what you could’ve already done with an existing 5-color commander. Anything you can do with Seluma angels, Valko Phyrexians, or Maular 7-drops could’ve been achieved under The Prismatic Bridge or Jodah, Grand Unifier, so they’re not really breaking as many rules as the name would lead you to believe.

If anything, these open up some really interesting deckbuilding opportunities, since most of these commanders are unique beyond just having rulebreaker text on them. I’m excited to see how people take these commanders and build them out in different ways. It’s kind of cool to me that you could sit down at a table with four Tolabow or Everforger decks that are all fundamentally different.

What do you think of rulebreaker, and what would you like to see from the mechanic in the future? Let me know in the comments section below, or let’s discuss it over in the Draftsim Discord. And check out The Daily Upkeep newsletter to stay up to date on all the latest MTG news.

Until next time, stay safe!