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Explorer is now called Pioneer on MTG Arena. Wizards of the Coast renamed the format in May 2025 after Arena reached parity with competitive tabletop Pioneer. The practical choice among Arena formats comes down to four questions: do you want rotation, how large and curated should the card pool be, what deck-building rules sound fun, and how closely should the experience resemble tabletop Magic?
Standard is the rotating, recent-set environment; Pioneer is the nonrotating tabletop-parity option; Historic is the broad, Arena-specific constructed format; and Brawl is the 100-card singleton format built around a commander. None is universally best. The right queue depends on whether you prefer a changing metagame, long-term decks, digital experimentation, or commander-style brewing.
MTG Arena formats at a glance
| Format | Rotation and card pool | Construction and play | Best fit |
|---|---|---|---|
| Standard | Rotates yearly; uses the currently legal recent Standard sets. Check the live list before crafting. | At least 60 cards in the main deck, up to 15 sideboard cards; best-of-one or best-of-three. | Players who want a changing card pool and the most widely played Arena Constructed queue. |
| Pioneer (formerly Explorer) | Nonrotating; Arena’s card pool is aligned with competitive tabletop Pioneer, with additions used to close competitive gaps. | Constructed Pioneer rules and card pool; available in best-of-one and best-of-three queues when scheduled. | Players seeking a durable format with a direct tabletop relationship. |
| Historic | Nonrotating, Arena-only and curated. Digital-only cards and rebalanced versions may be legal. | At least 60 cards, a four-copy limit except basic lands, and up to 15 sideboard cards (seven in best-of-one). | Players who want the broadest Arena-native pool and unusual digital strategies. |
| Brawl | Uses the Arena card pool subject to Brawl legality and bans. | Exactly 100 cards: one eligible legendary creature or planeswalker as commander plus 99 cards of the commander’s color identity; singleton except basic lands, no sideboard, 25 starting life, best-of-one, and a free mulligan. | Players who enjoy commander-centered, singleton deck building and Arena matchmaking. |
This is an orientation rather than a permanent legality chart. Bans, set legality, queues and special events can change, so use the Arena deck builder and the current official format pages when you are ready to play.
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Is Explorer still on MTG Arena?
Not as the current name. Wizards says, “Explorer was renamed Pioneer when we achieved parity with competitive tabletop Pioneer.” The change took effect in May 2025. Older videos, deck guides and search results still use “Explorer,” so searching both names can help you find legacy material, but the queue and current rules are labeled Pioneer in Arena.
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Pioneer is intended to be the Arena format that most closely matches competitive tabletop Pioneer. Wizards continues to evaluate tabletop and Magic Online metagames for cards missing from Arena and has said it plans Arena Championship events featuring Pioneer in 2027. That makes Pioneer the relevant answer when someone asks for a nonrotating Arena format with tabletop parity.
Standard: the rotating, current-set environment
How Standard rotation works
Standard is built around recent premier sets and changes on a predictable cycle. Wizards’ current Standard policy adds new sets throughout the year and, once each year after the first premier-set Prerelease, removes the six oldest Standard-legal sets. Rotation changes which cards can be used; it is not simply a ban announcement, and cards that rotate out are not automatically deleted from your collection.
Because the legal set list moves, do not rely on a copied list from an old article or video. The live Standard page and the Arena deck builder show what is legal at the moment you build. Bans and emergency changes can also alter the environment between rotations.
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- Main decks contain at least 60 cards.
- You may register up to 15 sideboard cards for best-of-three play.
- Best-of-one uses the main deck without a traditional sideboard game plan, while best-of-three lets you sideboard between games.
- The normal four-copy limit applies, except for basic lands and cards whose text creates a different rule.
Standard is the easiest place to learn current-set mechanics because most cards you encounter come from recent releases. It also has the shortest long-term commitment: a deck can be excellent today and lose key pieces at the next annual rotation.
Why people choose it
Choose Standard if you enjoy a metagame that evolves whenever a new set arrives, want the broadest selection of regular Arena Constructed queues, or prefer cards that are likely to be familiar from current tabletop releases. Wizards reported that Standard represented around 50% of MTG Arena play in its 2026 Constructed overview. The same report said 93% of Standard ranked games were best-of-one, an indication of player preference and game speed rather than a promise that every queue will have that split.
Pioneer: the nonrotating tabletop-parity choice
What makes Pioneer different from old Explorer?
Explorer was created as an Arena path toward Pioneer. After the Arena card pool reached parity with competitive tabletop Pioneer, Wizards adopted the Pioneer name. In practical terms, the format is no longer a temporary approximation: its purpose is to represent Pioneer while still allowing Arena-specific card additions when a competitive gap needs to be filled.
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Unlike Standard, Pioneer does not lose its oldest legal sets every year. A deck can remain usable across multiple seasons, although bans, new printings and metagame shifts can change whether it is competitive. “Nonrotating” therefore means the card pool does not expire on a scheduled annual rotation; it does not mean a deck is guaranteed to remain tier one or that every card remains legal forever.
Who should play Pioneer?
Pioneer is the natural choice if you play tabletop Pioneer, follow competitive paper events, or want to craft a deck with a longer expected lifespan than a Standard deck. It also provides a bridge between Arena and tabletop: tournament lists, sideboard plans and metagame discussions are more likely to transfer directly than they are in Historic.
The trade-off is access. A competitive Pioneer deck may require cards from many older sets, and Arena’s implementation can still receive additions intended to complete the competitive card pool. Before spending wildcards, confirm that the cards in a deck are actually available and legal in the current Arena Pioneer list.
Historic: Arena’s broad, digital-first format
Card pool and special cards
Historic is nonrotating, but it is not a copy of a tabletop format. Wizards describes it as Arena’s largest Constructed format and curates the card pool for the digital client. That pool can include digital-only cards and rebalanced versions of tabletop cards. Card text, power level and legality may therefore differ from what you remember from paper Magic.
The format is designed for experimentation across a wide span of releases. Older cards remain available after Standard rotation, and Arena-only designs can create lines of play that have no tabletop equivalent. That breadth is its attraction and its learning cost: a new player may face interactions from many years of cards and mechanics.
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- Use at least 60 cards in the main deck.
- You may play up to four copies of a card, other than basic lands, unless a card or format rule says otherwise.
- Best-of-three decks can have up to 15 sideboard cards.
- Best-of-one decks use a seven-card sideboard configuration for the Arena rules that support it.
Historic does not rotate with Standard, but “nonrotating” does not mean static. Wizards uses pre-bans and later interventions to protect diversity and responsiveness, and the legal list can change independently of Standard rotation.
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Recent Historic changes
On September 22, 2026, Wizards reverted more than 200 rebalanced versions of tabletop card designs and announced related bans. The Historic bans listed in that update were Galvanic Discharge, Guide of Souls, Nadu, Winged Wisdom, Sorin, Imperious Bloodlord, and The One Ring. These changes make old Historic deck guides especially risky: a list may contain a card whose text has reverted, a banned card, or a replacement that no longer fits the current metagame.
Brawl: a 100-card commander format
Construction rules
Brawl uses commander-style deck building but follows Arena’s own rules. Your deck has exactly 100 cards: one eligible legendary creature or planeswalker is the commander, and the other 99 cards must fit its color identity. Every nonbasic card is limited to one copy. Basic lands are exempt from the singleton limit. There is no sideboard.
Games start at 25 life and are best-of-one. Brawl gives you a free mulligan, so you may redraw an opening hand once without the usual penalty. The commander-centered structure changes how you evaluate cards: reliable access to one defining card matters, and the color-identity restriction can be as important as raw card power.
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Regular Brawl is aimed at broad commander experimentation. Competitive Brawl is a distinct queue for players who want stronger, more competitive decks; it is not merely a ranked toggle with identical goals. Check the rules and bans for the specific queue rather than assuming that a regular Brawl deck transfers unchanged.
Wizards says Brawl matchmaking weighs deck power mostly through commander choice and also considers each player’s Constructed skill rating. The company reported better power-level matching with slightly longer queue times. That description explains the system’s goal, not a guarantee that every individual match will be evenly powered.
Wizards’ format update also quoted Arena team representative Dave Finseth calling Brawl “a tinkerer’s playground” and noting that some cards have play patterns “just unfun for the majority of players.” The observation captures why Brawl bans can target frustrating experiences even when a card is not dominant in a conventional tournament metagame. The September 2026 update listed Nadu and Winged Wisdom as Brawl bans.
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What is the difference between Historic and Pioneer?
Both formats are nonrotating, but they solve different problems. Pioneer is organized around competitive tabletop parity and uses that relationship to guide Arena additions. Historic is organized around Arena itself: its curated pool can contain digital-only designs and rebalanced cards, and its bans and interventions are managed for the digital environment.
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Choose Pioneer when transferability to tabletop tournaments and a recognizable competitive card pool matter most. Choose Historic when you want the largest Arena-specific range, are comfortable with digital mechanics, or enjoy strategies that would not exist in paper Magic. Neither format is simply “Standard with older cards.”
Which MTG Arena format should a beginner play?
Start with Standard if you want the clearest on-ramp
Standard’s recent-set pool limits the number of mechanics and card interactions you must learn at once. It is a sensible starting point if you want to follow current set releases, play common Constructed queues, and accept that your deck will eventually rotate.
Try Brawl if singleton brewing sounds more appealing
Brawl is a good fit when choosing a commander and building around a theme is more motivating than tuning four copies of the same card. The free mulligan and best-of-one structure make it easy to play a quick game, but the 100-card singleton pool can still produce complicated interactions.
Move to Pioneer for a longer-lived competitive deck
Pioneer suits a player who already understands Constructed fundamentals and wants to invest in a nonrotating format connected to tabletop competition. Expect a larger card pool and a higher need to research current deck lists and sideboard plans.
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Historic is the choice for players who specifically want digital-first cards, rebalanced designs and a very broad nonrotating environment. It rewards curiosity, but you should be prepared to check card text and legality more often than in a recent-set format.
How reported participation should influence your choice
Wizards’ 2026 participation figures describe its own reported play data, not a guarantee about today’s queue population or an objective ranking of quality. The Constructed chart covered play from the release of Aetherdrift through the first few weeks of The Hobbit and combined best-of-one and best-of-three games. In addition to Standard’s roughly 50% share, Wizards reported that Competitive Brawl accounted for just under 10% of all Arena queue matches.
Those numbers can help you estimate where you are most likely to find a large active audience, but personal fit matters more. A format with a smaller share can still provide the rules and deck-building experience you actually want.
Quick Recap
Before you craft a deck
- Open the Arena deck builder and select the exact format. Confirm that every card is legal in Standard, Pioneer, Historic, Brawl or Competitive Brawl as applicable.
- Check the current ban list. Do this even when using a deck guide published recently; the September 22, 2026 reversion and ban update affected more than 200 rebalanced tabletop card versions and changed legal cards in Historic and Brawl.
- Confirm the match structure. Standard, Pioneer and Historic lists may be designed for best-of-one or best-of-three, while Brawl is best-of-one and has no sideboard.
- Check whether the deck depends on rebalanced or digital-only cards. That matters especially in Historic and can change how a strategy performs outside Arena.
- Consider rotation before spending wildcards. A Standard deck can lose six oldest sets at the annual rotation; Pioneer, Historic and Brawl do not follow that Standard rotation, but their bans and card pools still change.
- Recheck legality after major set releases and format announcements. Format names, active queues, bans and available cards are volatile details, so the live Arena interface is more reliable than a static list.
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