Your First Commander Deck
Commander is a 100-card singleton format. You pick a legendary creature as your commander, build a deck that matches its color identity, and play multiplayer games (typically four players). Games take a while, generally something like 20ish minutes per player. People make deals, break deals, and cast enormous spells that wouldn't be legal or practical in any other format.
The rules
100 cards exactly. Your commander is one of the 100. The other 99 go in your library.
Singleton. One copy of each card. The exception is basic lands (Plains, Islands, Swamps, Mountains, Forests), which you can run any number of.
Color identity. Every card in your deck must fit within your commander's color identity. Red-white commander means no blue, black, or green cards. There are some non-obvious edge cases worth knowing about, but the core idea is simple.
40 life. Twice the normal starting total.
21 commander damage. If one commander deals 21 combat damage to a player across the entire game, that player loses. Mostly relevant for Voltron strategies. In a typical game it doesn't come up.
The command zone. Your commander starts here, not in your library. Cast it whenever you normally could. When it dies or gets exiled, you can return it to the command zone instead. Recasting from the command zone costs {2} more each time. That's the command tax.
Why people play Commander over other formats
Other constructed formats are about finding the best 60 cards and tuning them. The card pool is usually restricted to recent sets, the metagame is tight, and the goal is consistency.
Commander is 100 cards, singleton, from almost the entire history of Magic. You can't be consistent. You're seeing less than 20% of your deck in any given game. Instead of optimizing a machine, you're building something that can improvise.
The multiplayer politics change every game. Someone's about to win, two players team up to stop them, then the alliance falls apart. You'll get killed by someone's four-card combo that cost twelve mana and required a specific board state. You'll also do that to someone else eventually.
Two people can build the same commander and end up with completely different decks. That's the other thing. You're not choosing from a menu of five viable archetypes. There are thousands of commanders and the card pool is enormous. The deck you build says something about how you think.
You don't have to build from scratch
Preconstructed decks exist and they're solid. Wizards releases new ones regularly, tied to set releases. They come ready to play.
Buying a precon and upgrading it is genuinely one of the best entry points. You play some games, figure out which cards underperform, figure out what you wish you had, and swap pieces. You learn what you care about in a deck, which makes building the next one much easier.
If you want to start from zero, begin with choosing a commander. The commander dictates the rest.
The skeleton of every deck
Regardless of strategy, every Commander deck needs the same infrastructure:
- Lands (~37)
- Ramp to get ahead on mana (~10-12)
- Card draw (~8-10)
- Removal (~8-12)
- Win conditions (~7-10)
The remaining slots are where your deck's identity lives. Synergy pieces, tribal payoffs, combo enablers, pet cards.
The ratios guide covers the numbers in detail. The 8x8 method and Command Zone template are two popular frameworks for filling those slots if you're staring at a blank decklist.