The Tool Desk
Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →Outbyte Driver Updater FREEScan for outdated or missing drivers - takes under a minuteDriver Scan →A Magic: The Gathering Prerelease is usually a Sealed event: you open six Play Boosters, add any number of basic lands, and build a deck of at least 40 cards. A reliable first build is two colors with 17 lands and 23 nonland cards, then adjusted only when your curve, mana fixing, or a set mechanic gives you a clear reason.
This guide covers what to bring, what is in a Prerelease Pack, how to sort and evaluate your pool, how to choose colors, how to register a legal list, and how to use the cards you do not play.
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What to confirm before you go
Prerelease logistics vary by store and release. Check the event listing or contact the host before traveling so you know exactly where and when to arrive and what the entry fee includes.
Verify the event details
- Confirm the store address, start time, registration deadline, and whether late registration is allowed.
- Ask whether the event uses best-of-one or best-of-three matches. Wizards supports both Sealed structures, but a store chooses the schedule and match procedure.
- Check whether deck registration happens on paper or through an event app, and whether the store provides basic lands, sleeves, tokens, or a deck list sheet.
- Ask how many rounds are planned and whether the event has a fixed end time. A Prerelease can take several hours once deck building and multiple rounds are included.
Pack a small event kit
- Bring a pen or pencil for life totals and the deck list, plus a phone or other reliable life tracker if you prefer one.
- Bring sleeves if you want a uniform, protected deck; use a fresh sleeve for every card in the registered deck and keep replacements available.
- Take a way to organize cards, such as a few labeled piles or spare deck boxes. The Prerelease Pack often includes a deck box, but set contents differ.
- Bring dice or counters for +1/+1 counters, loyalty, stun, or other set mechanics. A spindown die is commonly included, but it is better not to rely on one accessory.
- If you plan to trade after the event, keep trade cards separate from the registered pool so nothing is accidentally exchanged before the tournament ends.
What you receive at a Prerelease
The normal Sealed pool comes from six unopened Play Boosters in your Prerelease Pack. You open those packs at the event and may use the cards in them, plus any number of basic lands, to construct your deck. The cards you opened but did not put in the deck form your sideboard for that event.
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| Item | What it means for deck building | Set-specific notes |
|---|---|---|
| Six Play Boosters | Your main card pool. Every nonbasic card in the deck must come from these opened packs or another item the event explicitly permits. | This is the standard Sealed configuration described by Wizards. |
| Foil promo rare or mythic | Keep the promo with your pool unless the event instructions say it is not playable. If it fits your colors and strategy, it can be part of the 40-card deck. | Current guides describe a foil, year-stamped promo; exact treatment can be set-specific. |
| Basic lands | You may add any number of basic lands. Use the colors your final list can actually cast. | Ask the store whether lands are supplied or bring your own basics. |
| Spindown die and deck box | Useful for life tracking and storing the pool or finished deck. | These accessories are commonly listed, but packaging can change by set. |
| Arena code | Redeemable digital content may be included in selected regions. | The Foundations guide lists an Arena code in select regions; do not assume every Prerelease Pack has one. |
For example, the Foundations guide lists six Play Boosters, a foil year-stamped promo, an Arena code in select regions, a storage box, and a spindown. The 2026 Teenage Mutant Ninja Turtles guide lists six Play Boosters, a foil rare or mythic, a deck box, and a spindown. Confirm the current set’s contents with your host store rather than treating one set’s packaging as universal.
Open and sort the pool without making early commitments
Do not decide on colors from the first pack. Open all six Play Boosters, lay every card face up, and evaluate the complete pool. Early commitment is one of the easiest ways to build a deck around a color that later turns out to be shallow.
- Open every pack before sorting. Keep the promo with the pool and retain token, reminder, and rules cards separately.
- Make seven visible piles: white, blue, black, red, green, multicolor, and colorless. Put lands in a separate pile. If a card has a color indicator or colored mana cost, sort it by the color required to cast it; true multicolor cards belong in the multicolor pile.
- Separate playable cards from obvious fillers. A card can move back into consideration when a synergy, artifact, or threshold mechanic makes it better, so do not throw anything away.
- Mark premium cards. Use a small note or a second row for your strongest threats, efficient removal, reliable creatures, and cards that can break a stalled board.
- Count each color. The raw number of cards is only a starting point. A pile of twelve cards with several expensive or situational spells may be weaker than a pile of nine cards with a smooth curve and good interaction.
Choose the two colors that your pool can actually support
Two colors are the normal starting point for Sealed because they provide enough playables while keeping colored mana reliable. Wizards’ current set guides recommend two colors: many pools do not contain enough depth for a strong mono-color deck, while three or more colors can make spells difficult to cast. Treat two colors as a default, not an unbreakable rule; exceptional fixing or a single powerful splash can justify a different configuration.
Start with threats, not with a favorite color
Identify the cards that can win a game or swing it decisively: efficient creatures, large finishers, resilient threats, and cards that generate value when they enter or attack. Then count how many genuinely playable cards each color supplies. A color with one spectacular rare and a collection of weak filler may not deserve a main-deck slot.
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Use a practical color comparison
| Question | What to look for |
|---|---|
| Threat quality | Can the color present a credible board and finish a game, or does it rely on one expensive card? |
| Removal and disruption | How many cards answer opposing creatures, artifacts, enchantments, or other permanents at a reasonable cost? |
| Curve | Does the color have early plays, useful four- and five-mana cards, and only a few expensive finishers? |
| Combat and evasion | Does it have tricks, combat advantages, flying, or another way to attack through a board that becomes blocked? |
| Mana requirements | Are several spells demanding two colored symbols, or can the deck function with a modest number of sources? |
| Synergy and fixing | Do the cards reward a shared creature type, graveyard, artifact, or other mechanic, and do you have lands or spells that make additional colors realistic? |
Build a provisional list for the two best candidates, then compare the lists rather than comparing individual cards in isolation. Prefer the version that casts its spells on time while retaining the strongest threats and answers.
When a third color is justified
A splash is a small number of cards in a third color, usually a powerful card or an answer your main colors cannot provide. It is safer when the splash card has a single colored symbol, can be cast later in the game, and your pool contains reliable fixing. It is dangerous when the card needs two or more colored symbols, must be cast early, or requires you to replace several basic lands with sources that do not help your main colors. If adding the third color causes opening hands to miss their early plays, the splash has cost more than it added.
Build the 40-card shell
Use a 17-land starting point
Wizards’ Foundations Prerelease Guide gives the general Sealed guideline of 17 lands and 23 nonland cards in a 40-card deck. Start there. Move to 18 lands when the deck is unusually expensive, expects to make every land drop, or has powerful late-game mana sinks. Consider 16 only when the curve is exceptionally low and the deck has meaningful card draw or other ways to avoid flooding. These are adjustments, not automatic rules.
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Make the curve playable from the opening turns
Look at what the deck can do on turns two, three, and four. You want early creatures or other plays that affect combat, a middle of the curve that develops your advantage, and a few expensive cards that take over a game. A deck filled with six-mana spells may contain impressive cards but lose before it can cast them. An average mana value around two or three is a useful target for a normal Sealed deck, while still leaving room for a small number of finishers.
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Reserve slots for interaction
After selecting your best threats, add removal and other answers. Creature removal is especially important because most Sealed games are decided by combat, but also value cards that answer problematic artifacts, enchantments, or opposing bombs. Combat tricks can function as removal when they win a fight, although too many tricks leave you with no board. A practical first draft often contains several ways to answer creatures and at least a few cards that break a stalled board through evasion or another advantage.
Keep the deck at exactly 40 when possible
The rules allow a deck larger than 40 cards, but Wizards recommends staying at 40 so your strongest cards appear more often. Every extra card lowers the chance of drawing your best threats, lands, and answers at the right time. Put other playable cards in the sideboard instead of padding the main deck.
Set the mana base from the spells, not from habit
Count colored mana symbols in the cards you actually intend to cast. A deck with many double-white spells needs more white sources than a deck whose white cards each use only one white symbol. Place your most demanding early spells first, then check whether the land mix can cast them on schedule.
- Write down the number of white, blue, black, red, and green sources your candidate list needs.
- Prioritize the two main colors. The color with more early spells or more intense requirements should receive the larger share of basic lands.
- Account for fixing from lands, artifacts, creatures, or spells only when those cards are reliable and fit the deck’s curve.
- Test opening hands. A hand that contains attractive cards but cannot produce the required colors by the turns those cards matter is not a keepable plan.
- Recheck the list after every card change. Adding a second-color card can require changing the land mix, which can make another spell harder to cast.
Basic lands are the flexible part of the pool: the Sealed rules allow any number. Nonbasic lands and other fixing must come from the opened cards unless the event announces a special rule.
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Register a legal list and use the sideboard correctly
Before registration, perform a legality check rather than relying on memory.
- The main deck contains at least 40 cards.
- Every nonbasic card in the main deck came from the opened pool or the event’s permitted Prerelease item.
- Basic lands are added only in colors the mana base can support.
- The deck has early plays, credible threats, removal, and at least a few ways to attack through a creature stall. Flying and similar evasion can be particularly valuable when both players have crowded boards.
- The land count matches the curve. A deck with many expensive cards should not automatically remain at 16 lands, and a low-curve deck should not add lands without a reason.
- The deck list, if required, matches the cards you present. Keep unplayed cards organized so a judge can verify the pool.
In Sealed, all opened cards that are not in your main deck are your sideboard. In a best-of-three event, you may exchange cards between games, then return to a legal 40-card minimum before the next game. In best-of-one, there is no second game in the match for those changes, so build the main deck for the field you expect rather than counting on sideboarding.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How to sideboard between games
Against a fast creature deck
Bring in cheaper blockers, efficient removal, and cards that stabilize combat. Expensive cards that cannot affect the board before the late game are candidates to remove. Do not cut all of your finishers; you still need a way to win after stabilizing.
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Against a slow or controlling deck
Favor resilient threats, card advantage, and cards that punish a long game. A narrow combat trick or a fragile early blocker may be less useful than a threat that survives one removal spell.
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When the opponent reveals a key permanent
If an opposing artifact, enchantment, or other permanent is dominating games, bring in a dedicated answer from the sideboard when one exists. Remove a low-impact card rather than weakening the deck’s entire mana curve.
Sideboarding should be deliberate: identify what the opponent’s deck is doing, name the card that answers it, and make the smallest set of changes needed to improve your plan.
What to do with cards you do not play
Do not discard or trade the unused cards during the event. They remain your Sealed sideboard and may become better after you see an opponent’s strategy. Keep them sorted by color and type so you can find answers quickly between games.
After the event, separate the cards into three groups: cards worth keeping for a future deck or collection, cards you may trade, and bulk cards for storage or recycling. Retain the deck list with the pool if you want to remember which cards were opened together. The promo, even when it misses your main colors, should be stored separately if you want to protect its condition.
Quick Recap
A repeatable deck-building workflow
- Open and sort: finish all six Play Boosters, keep the promo with the pool, and create color, multicolor, colorless, and land piles.
- Mark the best cards: identify threats, removal, evasion, fixing, and cards that share a mechanic.
- Draft two candidate cores: choose the two color pairs with the strongest combination of playables, curve, and mana requirements.
- Build 23 nonlands: begin with threats, add interaction, then fill the curve with creatures and value cards that support the plan.
- Add 17 lands: divide basics according to colored symbols and early casting needs, then include only reliable fixing.
- Goldfish opening hands: draw several sample hands and ask whether they can make useful plays and cast their spells on time. This is a consistency check, not a substitute for judging card quality.
- Cut to 40: remove the weakest or most situational cards rather than adding a 41st card.
- Register and organize: verify legality, place the main deck in one pile, and keep the sideboard clearly separated.
Common problems and fixes
| Problem | Likely cause | Fix |
|---|---|---|
| You miss early plays despite having good cards. | The deck is too expensive or has too few early creatures. | Replace a high-cost card with a playable two- or three-mana card, or reconsider the 16-land plan if the curve is not genuinely low. |
| You draw spells you cannot cast. | Too many colors or too many intense colored costs. | Return to two colors, cut double-symbol splash cards, and rebalance basic lands around the spells you cast earliest. |
| Your deck runs out of action. | Too many narrow tricks or low-impact cards replaced your threats. | Add creatures and value cards that remain useful when drawn late; keep only the best combat tricks. |
| Opponents build an unbeatable board stall. | The deck has no evasion or way to change combat. | Bring in flying or other evasive threats, removal, and cards that create favorable attacks or bypass blockers. |
| Your pool looks powerful but the list is 43 or more cards. | You are trying to include every exciting card. | Compare the weakest cards directly and cut to 40. Consistency is usually worth more than a few extra options. |
| You cannot find a sideboard card between games. | The unused pool is unsorted. | Keep sideboard cards in color-coded piles, with dedicated answers marked before the first round. |
The essential numbers to remember
- Six Play Boosters normally make the Sealed pool.
- The deck must contain at least 40 cards.
- You may add any number of basic lands.
- Two colors are the usual starting point for reliable mana.
- Begin with 17 lands and 23 nonlands, then adjust for the actual curve and fixing.
- Your best threats, removal, curve, and mana reliability matter more than playing every exciting card.
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