Commander Deck Building Guide
A balanced Commander deck needs 36–38 lands, 10–12 ramp, 8–10 card draw, 8–10 removal, and 7–10 win conditions — here's how to get the ratios right.
This guide covers everything from choosing your commander to optimizing your mana base. Or let Karn, our AI deck building assistant, analyze your deck and suggest improvements based on real player data.
Essential Deck Components
A balanced Commander deck needs these categories in the right proportions
Win Conditions
7-10 cards
Cards that directly help you win the game. Include multiple paths to victory (combat damage, combo, alternate win cons) so your deck isn't one-dimensional.
Examples:
- Combat finishers (Craterhoof Behemoth)
- Combos (Thassa's Oracle + Demonic Consultation)
- Alternate win cons (Approach of the Second Sun)
Card Draw
8-10 cards
Essential for maintaining card advantage and finding your win conditions. Prioritize repeatable draw effects over one-shot cantrips in Commander.
Examples:
- Rhystic Study
- Phyrexian Arena
- Esper Sentinel
- Sylvan Library
- Monastery Siege
Ramp
10-12 cards
Acceleration helps you cast your commander and big spells faster. Mix artifact ramp (works in any deck) with land ramp (harder to remove).
Examples:
- Sol Ring
- Arcane Signet
- Cultivate
- Three Visits
- Chromatic Lantern
- Smothering Tithe
Removal
8-10 cards
Answers to threats. Include a mix of single-target removal (flexibility) and board wipes (reset button when you're behind).
Examples:
- Single target: Swords to Plowshares, Chaos Warp
- Board wipes: Wrath of God, Blasphemous Act
- Flexible: Generous Gift, Beast Within
Synergy Pieces
15-20 cards
Cards that work with your commander's strategy and each other. These create the unique identity of your deck and powerful combos.
Examples:
- Theme payoffs
- Tribal support
- Mechanic enablers
- Engine pieces
- Value generators
Lands
36-38 lands
The foundation. Calculate as: 28 + (2 × number of colors) + average mana value. Prioritize color fixing for 3+ color decks.
Examples:
- Basics for budget
- Check lands (Glacial Fortress)
- Fetch lands (expensive but powerful)
- Utility lands (Reliquary Tower, Rogue's Passage)
The Commander Deck Ratio & 100-Card Formula
The quick answer first, then how to adjust it for your deck
A standard Commander deck ratio is 1 commander, 36-38 lands, 10-12 ramp, 8-10 card draw, 8-10 removal, 7-10 win conditions, and 15-20 synergy or theme cards across the 99. Those proportions are the backbone of nearly every consistent EDH deck - enough lands to avoid mana screw, enough ramp and draw to keep the game moving, enough interaction to survive, and a real plan to win. This is the commander deck formula the rest of this guide builds on, and the same composition our AI assistant Karn applies when it builds or analyzes a list.
Quick Deck Formula (100 cards)
• 1 Commander
• 36-38 Lands
• 10-12 Ramp
• 8-10 Card Draw
• 8-10 Removal
• 7-10 Win Conditions
• 15-20 Synergy/Theme Cards
• 3-5 Flex Slots
Why This Ratio Works
Commander is a 100-card singleton format played at 40 life against multiple opponents, so games run long. You need more lands (36-38) and more ramp (10-12) than a 60-card deck to hit your curve, more card draw (8-10) to refuel, and more removal (8-10) to answer three opponents' worth of threats. The 15-20 synergy cards are what give the deck its identity.
How to Adjust the Ratio
Treat the numbers as a starting point, not a law. A low-curve aggressive deck with lots of cheap ramp can drop to 34-35 lands; a three-or-more-color deck should push ramp and fixing toward 12; a voltron deck leaning on one commander can trim win conditions. The commander deck composition flexes with your strategy - the categories stay, the counts shift.
Building Your Deck
How to build a Commander deck step by step, from commander to mana base
Choose Your Commander
Pick a legendary creature that excites you. Your commander sets your color identity and strategy. Consider play patterns, power level, and your budget.
Define Your Strategy
What's your game plan? Aggro, control, combo, tribal, voltron? Having a clear strategy helps every card choice support your goal.
Add Win Conditions
Start with 7-10 cards that can actually close out games. Avoid "goodstuff" piles - every card should contribute to your win.
Include Core Components
Add the essential building blocks: card draw, ramp, and removal. These keep your deck functional and interactive.
Build Your Mana Base
Add 36-38 lands with appropriate color fixing. Use the formula: 28 + (2 × colors) + average mana value. Don't skimp on lands!
Test & Refine
Playtest your deck! Take notes on what works and what doesn't. Cut underperformers, add missing pieces, and adjust ratios.
Common Deck Building Mistakes
Avoid these pitfalls to build stronger, more consistent decks
Not Enough Card Draw
Fix: Commander games go long. Without draw, you'll run out of cards and lose. Aim for 8-10 draw effects minimum.
Too Few Lands
Fix: Many new players run 32-34 lands. This leads to frequent mana screw. Run 36-38 unless your curve is very low.
No Clear Win Condition
Fix: Don't just play 'good cards.' Every card should contribute to how you win. If you can't explain your win con, rethink the deck.
Ignoring Interaction
Fix: You need answers to opponents' threats. Run 8-10 removal spells or you'll get run over by combo or commanders.
Poor Color Fixing
Fix: In 3+ color decks, prioritize lands that produce multiple colors and artifacts like Chromatic Lantern. Color screw loses games.
Too High Mana Curve
Fix: If your average mana value is above 3.5, you'll be too slow. Include cheap interaction and ramp to smooth your curve.
Advanced Optimization Tips
Mana Curve Matters
Track your mana curve. Aim for an average mana value around 2.5-3.5. Too high and you'll be slow; too low and you'll run out of impactful plays.
Pro tip: EDHRec shows average mana value for popular commanders. Use it as a benchmark.
Interaction Density
Run instant-speed interaction. If opponents combo off and you have no answers, you lose. Counterspells, instant removal, and flash creatures keep you safe.
Rule of thumb: 30% of your non-land cards should be interaction or card draw.
Test Your Hands
Goldfish your deck (play solitaire). Draw opening hands and see if you can execute your strategy by turn 6-8. If not, adjust your ratios.
Key question: Can you cast your commander on curve and protect it?
Know Your Meta
Adapt to your playgroup. If everyone plays graveyard decks, run graveyard hate. If combo is common, pack more counterspells. Sideboard tech for your meta.
Ask yourself: What strategies beat you most often? Add answers.
Let AI Build Your Deck
Want to skip the manual work? Let Karn handle it
AI Deck Builder
Tell Karn what you want to build and get a complete, optimized decklist in minutes. Try the AI Deck Builder.
Tips for Better Results
Three strategies to dramatically improve your AI deck building results. Read the guide.
Commander Deck Building FAQ
What is the standard Commander deck ratio?
A balanced Commander deck runs 1 commander, 36-38 lands, 10-12 ramp, 8-10 card draw, 8-10 removal, 7-10 win conditions, and 15-20 synergy or theme cards across the 99. Those proportions keep you from getting mana screwed, running out of gas, or having no way to close the game.
What is the Commander deck formula for 100 cards?
Start from the 100-card total, subtract your single commander, then fill the 99 using the ratio above: lands first (36-38), then the ramp, draw, and removal cores (roughly 10/9/9), then 7-10 win conditions, and the rest as synergy and flex slots. The Quick Deck Formula card on this page lays out every slot.
How many lands should a Commander deck have?
Run 36-38 lands in most Commander decks. A quick formula is 28 + (2 x number of colors) + average mana value. Only drop to 34-35 if your curve is very low and you have lots of cheap ramp - most new players run too few lands and get mana screwed.
How do I build a Commander deck step by step?
Choose a commander you enjoy, define a clear strategy, add 7-10 win conditions, add the core components (draw, ramp, removal), build a 36-38 land mana base with color fixing, then playtest and tune the ratio. The six-step walkthrough above covers each stage.
How many ramp, draw, and removal cards does an EDH deck need?
Aim for 10-12 ramp, 8-10 card draw, and 8-10 removal spells. Commander games go long and start at 40 life across three opponents, so you need more acceleration, card advantage, and interaction than in 60-card formats. Card draw is the slot newer brewers most often shortchange.
Does the Commander deck ratio change for budget or competitive decks?
The skeleton holds at every power level - what changes is the quality of the cards filling each slot, not the counts. Budget decks use basics and cheaper staples; higher-power decks use efficient duals, fast mana, and tighter win conditions, but still run roughly 36-38 lands and 10-12 ramp.
What is a good mana curve for a Commander deck?
Aim for an average mana value around 2.5-3.5. Too high and you fall behind; too low and you run out of impactful plays. Include enough cheap interaction and ramp to smooth the curve and reliably cast your commander on time.
Can the AI build a Commander deck for me using these ratios?
Yes. Karn, our AI deck building assistant, applies these ratios automatically - it can build a full Commander list from scratch or analyze a list you paste, drawing on Scryfall's 40,000+ real cards and thousands of Commander decks. Start a chat to try it.
Last updated: