The format in one paragraph
Commander is a multiplayer format, usually four players, where each person plays a 100 card deck with no duplicate cards apart from basic lands. One legendary creature is your commander. It starts in a separate zone, you can cast it whenever you can afford it, and it returns there whenever it dies. Everyone starts at 40 life. Games run long, politics matter, and it is the most played format in Magic by a wide margin.
The four rules that shape deckbuilding
Most Commander rules are trivia. Four of them determine what your deck can look like.
Singleton
One copy of each card, except basic lands. This is the rule that makes the format what it is: you cannot build a consistent combo deck by running four copies, so every deck is more variable and more forgiving than a sixty card equivalent.
It also means tutors are much stronger here than anywhere else, because finding a specific card is otherwise nearly impossible.
Color identity
Every card in your deck must fall inside your commander’s color identity. Identity is broader than the card’s color: it includes mana symbols anywhere on the card, including in ability costs and rules text.
The practical trap: a colorless artifact with a green mana symbol in its activated ability has a green color identity and cannot go in a mono-blue deck. Check ability text, not just the mana cost in the corner.
The command tax
Your commander goes back to the command zone when it dies, and recasting it costs two more generic mana each time. Four, then six, then eight.
This is the most important number in your deckbuilding. Expect your commander to die two or three times per game, and build a deck that still functions while it is gone.
Commander damage
21 combat damage from a single commander eliminates a player, regardless of life total. Damage from different commanders does not combine, and non-combat damage does not count.
In practice this matters most as a threat to watch: a large evasive commander can kill you from 40 life in three hits while everything else at the table looks harmless.
Building your first deck: the slot template
The most useful thing anyone can give a new Commander player is a target count per category. Almost every first deck fails the same way, by having plenty of exciting cards and not enough lands, ramp, draw, or removal.
| Card | Type | Why it is here |
|---|---|---|
| Lands | 36 to 38 | Lower only if your curve is genuinely low and you have plenty of ramp. Most new decks run too few and then cannot cast their expensive cards. |
| Ramp | 10 to 12 | Mana rocks, mana dorks, and land searches. This is the most commonly underbuilt category. Ten is not excessive, it is the baseline. |
| Card draw | 8 to 12 | Repeatable engines preferred over one-shot draw spells, because the format runs long enough for engines to pay off several times. |
| Targeted removal | 6 to 8 | You need answers to a single problem permanent. Spread across creature, artifact, and enchantment answers rather than all one type. |
| Board wipes | 2 to 3 | Different mechanisms, not three of the same. Three opponents means boards get out of hand faster than in a duel. |
| Your actual theme | 25 to 30 | What is left. This feels small and it is correct. A deck with sixty theme cards and no fundamentals loses to itself by turn six. |
That leaves roughly thirty slots for the thing your deck actually does, which surprises everyone building their first deck. The sixty-odd fundamental cards are what let those thirty do anything.
What makes Commander different to play
Three opponents, not one. Everything symmetrical is worth three times as much. A board wipe kills three boards. A tax effect is checked three times per turn cycle. A card that says “each opponent” scales.
Forty life. Aggression is much slower to pay off, which is why the format skews toward value and engines. A deck that would kill a duel opponent on turn four takes until turn seven or eight here.
Games run long. Twelve turns or more is normal. This is why repeatable effects beat one-shot effects, and why expensive cards are castable at all.
You are not alone in wanting to win. If someone is about to win, the other three players are motivated to stop them. This changes how you play far more than any rule does: being visibly ahead draws attacks, so threat assessment and timing matter more than raw power.
The social contract
Commander is a casual format with no formal tiering, which means the most important compatibility check is a conversation rather than a rule.
Before a game, it is worth establishing roughly:
How fast are we playing? A deck that wins on turn five and a deck that wins on turn twelve do not produce a game, they produce one person doing something while three people watch.
Are infinite combos on the table? Some groups love them, some find them unsatisfying. Neither is wrong, but a mismatch is unpleasant.
How much land destruction and stax? Effects that stop people playing Magic are legal and are socially fraught. Ask first.
None of this is enforced by rules. All of it decides whether the game is fun, which in a format played with the same people every week matters more than deck quality.
Common beginner mistakes
Too few lands. Thirty-three lands feels like plenty and is not. Thirty-six is the floor for most decks.
Not enough ramp and draw. These are the two categories that convert a slow start into a real game. Ten ramp and eight draw is a minimum, not a luxury.
Too many expensive cards. A curve topping out at eight mana with four ramp pieces is a deck that sits with cards in hand. Count how many cards cost six or more and keep it under ten.
No interaction. A deck with zero removal cannot answer the artifact that is winning the game. You will lose to things you could have killed.
Building around a commander that is easy to remove without a backup plan. Covered above, and worth repeating because it is the most common structural error.
Threat assessment, the skill that decides games
The single biggest gap between a new Commander player and an experienced one is not deckbuilding. It is knowing who to attack.
In a duel there is one opponent and the answer is always them. At a four player table, every attack is a choice, and choosing wrong loses games you were winning.
The questions worth asking each turn:
Who is closest to winning, and how? Not who has the biggest board. A player with an empty board and a combo engine assembling is more dangerous than a player with six creatures and no way to break through.
What am I actually stopping? Attacking a player does nothing except reduce their life. If their win condition is a combo, damage is irrelevant and you should be saving your removal instead.
Who will retaliate? Attacking the player to your left costs you less than attacking the player to your right, because the player to your right gets to act before your next turn.
Am I the threat? If you are, expect to be attacked, and play accordingly. Holding a blocker or a removal spell rather than committing everything is often correct when you are ahead.
The classic beginner error is attacking whoever has the most creatures, because that is what looks threatening. The classic intermediate error is over-correcting and never attacking anyone, which lets the actual threat win uncontested.
Politics without being obnoxious
Commander is the only format where talking is part of the game, and it is genuinely a skill rather than a social nicety.
Things that work:
Point out real threats. If someone is about to win and the table has not noticed, saying so is both correct and in your interest. It is also information, which is free to give and valuable.
Make honest deals. “I will not attack you this turn if you kill that artifact” is a legitimate play. Keeping your word matters, because you are playing with these people again next week.
Explain why you are attacking someone. Reduces retaliation and keeps the table focused on whoever is actually ahead.
Things that do not:
Constant deal-making with no follow-through. Break enough deals and nobody negotiates with you, which removes an entire dimension of the format from your games.
Pleading. Asking not to be attacked because you are behind works once.
Kingmaking out of spite. Deciding who wins when you cannot win yourself, based on grudges, makes games worse for everyone including you.
The healthy version of Commander politics is information sharing and short-term deals, not manipulation. In a format where the same four people play weekly, reputation is a resource.
Getting started cheaply
Preconstructed decks are the fastest route. They cost around the same as building a budget deck yourself, they work out of the box, and they are designed to be upgraded gradually. Buying one and changing ten cards is a genuinely good way to learn the format.
Building from scratch is cheaper if you already own cards, and much more satisfying. The rules that keep the cost down:
- Two colors. The mana base is where the money goes, and each additional color multiplies it.
- Basics are free. Run more of them than feels elegant.
- Cheap staples first. Ramp, draw, and removal are mostly inexpensive and get reused in every deck you ever build.
- The commander itself is rarely expensive. Pick the one you find interesting.
A forty dollar deck can absolutely hold its own at a casual table. What it cannot do is play against an optimised three hundred dollar deck, which is a matching problem rather than a budget problem.
One final piece of buying advice. Resist upgrading a deck card by card as you notice individual weaknesses. Play ten games first, write down what actually went wrong, and you will usually find the answer is a category rather than a card: not enough draw, too few lands, no answer to artifacts. Fixing the category is cheap. Chasing individual expensive cards to fix a structural problem is not, and it rarely works.