TLDR
- It takes 10 poison counters to eliminate a player in Commander.
- Commander players start at 40 life, but poison does not scale up with life total.
- Infect, toxic, poisonous, and proliferate all interact with poison counters in different ways.
- In a four-player Commander game, each opponent still needs 10 poison counters individually.
- Some playgroups house-rule poison to 15 or 20 counters, but that is not the official Commander rule.
Ten poison counters. That’s the whole answer, and it surprises a lot of Commander players the first time it comes up.
The answer to how many poison counters to kill in Commander is 10, even though Commander starts at 40 life. Poison counters are not life loss. They are a separate loss condition. Once a player has 10 or more poison counters, that player loses the game as a state-based action.
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That gap between 40 life and 10 poison counters is why poison is one of the most debated mechanics in EDH. Some players see it as a fair alternate win condition that keeps huge lifegain decks honest. Others feel like it cuts around the format’s slower, social pace. Both reactions make sense. Poison is powerful, clean, and a little rude at the kitchen table if nobody saw it coming.
How Many Poison Counters to Kill in Commander?
It takes 10 poison counters to kill in Commander under the official rules.
That number does not become 20 because Commander has twice the normal starting life total. It does not become 30 because you have three opponents. It is still 10 poison counters per player.
The common confusion comes from how multiplayer Commander feels. In a normal four-player pod, a poison deck may need to give out 30 total poison counters to win the game by poison alone: 10 to opponent one, 10 to opponent two, and 10 to opponent three. But each player’s personal poison threshold is still 10.
So the clean version is:
- One player loses at 10 poison counters.
- Three opponents may require 30 total poison counters if you plan to poison everyone.
- Commander’s 40 starting life total does not change the poison rule.
- Commander damage is a separate loss condition.
That last point matters. Commander already has another alternate way to lose: 21 combat damage from the same commander. Poison does not replace that rule. It sits next to it.
Why Commander’s 40 Life Does Not Change Poison
Commander gives each player 40 starting life because multiplayer games need more time to develop. It lets people cast their commanders, build boards, miss land drops, complain about missed land drops, and still play Magic.
Poison counters are not part of that life total.
That means a player at 96 life and a player at 3 life both lose if they reach 10 poison counters. Lifegain does not remove poison counters. Damage prevention can help before the poison gets applied, but once the counters are on a player, they usually stay there.
This is why poison feels so different from normal combat. A lifegain player can undo a huge attack by gaining life later. A poisoned player usually cannot undo poison counters in any meaningful way. They have to stop the poison source, prevent the damage, remove the creature, counter the spell, or end the game first.
That makes poison efficient, but not automatic. Poison decks still have to connect, resolve spells, protect key pieces, and survive the table turning toward them.
And yes, the table probably will turn toward them.
Infect vs. Toxic vs. Poisonous
Poison counters show up through a few different mechanics. They all point toward the same 10-counter loss condition, but they get there differently.
Infect
Infect is the classic poison mechanic. A creature with infect deals damage to players in the form of poison counters. If a 4/4 creature with infect deals combat damage to a player, that player gets four poison counters instead of losing four life.
Infect also changes how damage works against creatures. Damage from a source with infect is dealt to creatures in the form of -1/-1 counters.
This makes infect dangerous because pump spells matter a lot. A 1/1 infect creature may look harmless, but if it gets +4/+4 and slips through blockers, that is five poison counters in one hit. Two hits like that can end a player.
Some well-known infect cards and poison finishers include:
- Blighted Agent
- Skithiryx, the Blight Dragon
- Triumph of the Hordes
- Glistener Elf
- Ichor Rats
- Blightsteel Colossus
In Commander, infect decks often play like Voltron, tempo, or combo decks. They usually need protection, evasion, and timing. You are not just trying to deal damage. You are trying to deal the right damage to the right player at the right time.
Toxic
Toxic is newer and works differently. A creature with toxic still deals normal combat damage. Then, if it deals combat damage to a player, that player also gets poison counters equal to the toxic number.
For example, a 2/2 creature with toxic 1 that hits a player deals two combat damage and gives that player one poison counter. If a creature has toxic 3, it gives three poison counters when it deals combat damage, no matter how much combat damage it actually dealt.
That difference matters. Pumping a toxic creature’s power increases normal damage, but it does not increase the toxic number unless another effect gives it more toxic.
Toxic is often better for slower poison decks because it can pressure life totals and poison totals at the same time. It also plays well with “corrupted” cards that care if an opponent has three or more poison counters.
Poisonous
Poisonous is an older keyword. It triggers when the creature deals combat damage to a player, then gives that player a set number of poison counters.
The main thing to remember is that poisonous is a triggered ability. Infect and toxic are not the same thing, even if they all make poison counters.
You will not see poisonous as often as infect or toxic in Commander, but it still matters for rules questions and older cards.
How Proliferate Makes Poison More Dangerous
Proliferate is one of the main reasons poison counters are scary in Commander.
To proliferate, you choose any number of players or permanents that already have counters, then give each another counter of each kind they already have. If an opponent has one poison counter, proliferate can give them one more.
That means the first poison counter is often the most important one.
A deck might hit each opponent once with a small toxic creature or a spell like Prologue to Phyresis, then use proliferate effects to keep adding poison counters without needing to attack every turn. Cards like Evolution Sage, Thrummingbird, Tekuthal, Inquiry Dominus, and Viral Drake can turn one early poison counter into a real clock.
This is also why poison can create table tension. A single poison counter may not look like much, but it changes the texture of the game. Once everyone has one, every proliferate trigger starts to feel like a countdown.
Does Infect Commander Damage Count Twice?
No. Infect does not count twice.
But combat damage from a commander with infect can still matter in two ways.
If your commander has infect and deals six combat damage to a player, that player gets six poison counters. That same hit can also count as six commander damage from that commander, because it was still combat damage dealt by a commander.
That does not mean the player took six life loss. They did not. Infect changes the result of the damage against a player into poison counters. But the game still recognizes that damage was dealt.
For most games, the poison counter total will matter more. Ten poison counters is much closer than 21 commander damage. But the commander damage tracking can still matter in unusual games, especially if infect gets removed later or the deck can win through regular commander combat damage.
With toxic, the split is easier to understand. A commander with toxic deals normal commander combat damage, then toxic gives poison counters in addition. The poison counters are not extra commander damage. They are just poison counters.
Can You Remove Poison Counters in Commander?
Usually, no. Or at least, not easily.
Magic has very few cards that remove poison counters from yourself. Leeches is the famous old example, and it is not exactly a normal Commander staple. Some cards can remove counters from opponents or stop players from getting counters in the first place, but poison removal is intentionally limited.
Prevention is usually better than cleanup.
Good ways to fight poison include:
- Remove infect and toxic creatures before combat.
- Block early poison creatures instead of saving removal too long.
- Use damage prevention effects when a huge infect hit is coming.
- Watch for pump spells and protection spells.
- Stop proliferate engines before they take over.
- Use cards like Solemnity or Melira, Sylvok Outcast if your deck can support them.
- Give yourself hexproof when poison is coming from targeted spells or abilities.
Hexproof is worth explaining. It does not stop combat damage from an infect creature. It also does not stop a toxic creature from hitting you in combat. But it can stop targeted spells and abilities that would give you poison counters directly.
That’s a small distinction, but small distinctions win games.
Should Poison Be 10, 15, or 20 in Casual Commander?
Officially, poison is 10.
Casually, your group can house-rule whatever it wants. Commander has always had a social layer, and poison is exactly the kind of mechanic that benefits from a quick Rule 0 conversation.
Some groups keep poison at 10 because that is the rule and because poison decks already struggle to eliminate three players. Other groups raise it to 15 or 20 because they feel 10 is too low compared to 40 starting life. Neither preference is morally superior. It depends on the kind of games your table wants.
A good pregame script is simple:
“I’m playing a poison deck. Official poison is 10 counters. This version is around mid-power, not cEDH. Are we good with normal poison rules?”
That solves a lot of problems before anyone gets knocked out on turn five and starts staring into the middle distance.
In our view, keep official poison rules unless your group has a clear reason not to. Changing poison to 15 or 20 can make dedicated poison decks much worse, especially in multiplayer. But if your group is casual, creature-heavy, and hates sudden eliminations, a house rule may make sense.
Building and Testing Poison Decks With Proxies
Poison decks are a great example of why Commander players use proxies for casual testing. The strategy can be hard to tune on paper because small changes matter a lot.
Too little poison, and the deck gives everyone three counters before doing nothing. Too much all-in infect, and the whole table removes your first creature and you never recover. Too much proliferate, and you might spend several turns adding counters without actually defending yourself.
That is where proxies help. If your table allows them, you can test poison packages before committing to a final list. ProxyKing makes MTG proxy and playtest cards for casual Commander, cubes, and testing where proxies are allowed, which is useful when you want to try a poison shell without constantly moving expensive cards between decks. You can browse their Commander-friendly proxy options here: ProxyKing MTG proxies.
For poison decks, I would test in stages:
Start with a light poison package if your deck is not fully dedicated to the mechanic. This might include a few toxic creatures, a few proliferate cards, and one or two finishers.
Move to a dedicated infect plan if your deck wants to kill with combat damage quickly. That version needs cheap threats, pump spells, evasion, and protection.
Try a proliferate shell if you want a slower, grindier poison deck. This version wants ways to give each opponent at least one poison counter, then repeat proliferate triggers over time.
The best poison deck for your table is not always the strongest one. It is the one that creates real games. A poison deck should be dangerous, but it should still give people chances to interact.
Common Poison Counter Mistakes in Commander
The most common mistake is assuming poison scales with life total. It does not. Commander starts at 40 life, but the poison limit is still 10.
The second mistake is calling them “infect counters.” Infect is the ability. Poison counters are the counters placed on players.
Another mistake is mixing up infect and toxic. Infect replaces life loss from damage to players with poison counters. Toxic adds poison counters in addition to normal combat damage.
Players also forget that proliferate only works if the player or permanent already has a counter. You cannot proliferate a player from zero poison counters to one. You need the first poison counter from another source.
And finally, some players forget to talk about poison before the game starts. That is not a rules mistake, but it can become a table problem. Poison is legal. Poison is also emotionally loud. A 20-second conversation can prevent a 20-minute argument.
Final Thoughts
It takes 10 poison counters to eliminate a player in Commander. That rule is simple, but the gameplay around it is not.
Poison ignores life totals, works well with proliferate, and creates pressure that many decks are not built to answer. Infect can kill fast. Toxic can chip away while still dealing normal damage. Poisonous exists in its own older rules space. And Commander players will continue debating whether 10 poison counters feels right in a 40-life format.
For official games, use 10. For casual games, talk to your group. If you are building poison, test the deck honestly and tune it for the kind of table you actually play at.
Poison is at its best when it feels like a real threat, not a surprise paperwork error.
FAQs
How many poison counters kills a player in Commander?
A player loses the game at 10 poison counters in Commander. The 40 starting life total does not change the poison threshold.
Does a player need 20 poison counters in EDH?
No. Under official Commander rules, a player needs 10 poison counters to lose. Some groups use 15 or 20 as a house rule, but that is not the default rule.
Does infect damage lower life total?
No. Damage from a source with infect causes poison counters to players instead of life loss. Against creatures, infect damage is dealt in the form of -1/-1 counters.
Does toxic deal normal damage too?
Yes. Toxic gives poison counters in addition to the normal combat damage the creature deals to a player.
Can proliferate give someone their first poison counter?
No. Proliferate only adds another counter of a kind the player or permanent already has. A player needs at least one poison counter before proliferate can add more poison.
Are poison decks allowed in Commander?
Yes, poison decks are allowed in Commander unless your playgroup uses a house rule. It is still smart to mention poison before the game starts, especially in lower-power casual pods.