Poison in MTG: Rules, History, and Best Cards

Last updated on December 20, 2025

Decimator Web | Illustration by Daniel Ljunggren

From milling to commander damage, alternate win conditions have existed in Magic for a long time now. They give players a way to win without bringing your opponents’ life total down to 0.

One of the most famous alternate win condition is poisoning your opponent. Many decks have leveraged poison to win games quicker than they could with normal damage. Decks like Legacy Infect, Modern Infect, and countless EDH decks all use this powerful mechanic to dispatch their opponents.

So what is poison, and how does it work? Let’s talk about that.

How Does Poison Work?

Prologue to Phyresis | Illustration by Simon Dominic

Poison counters are counters that are placed on players instead of game objects. Mechanics like energy have expanded the idea of players having unique counters since poison counters were added to the game.

When a player has 10 or more poison counters, that player loses the game. A player is considered poisoned if they have any poison counters, and they're considered corrupted if they have three or more poison counters.

Why Would You Use Poison as Your Weapon of Choice?

Ten points of poison is less than the traditional 20 damage needed to end the game so you can quickly steal wins even from a losing position. Especially with pump spells like Might of Old Krosa or Scale Up that let you sneak in 10 poison much faster than you might expect.

The History of Poison in MTG

Poison counters debuted in 1994’s Legends on Pit Scorpion. It saw sporadic printings up until Scars of Mirrodin in 2010. But the number of unique cards that dealt with poison went from seven to over 60 with the printing of the infect mechanic!

Cards were printed in the vein of older poison cards even in Scars of Mirrodin, like Pistus Strike that give poison counters without infect. We haven’t seen any unique cards printed with infect since then, but Fynn, the Fangbearer from Kaldheim gives players poison counters when your deathtouch creatures deal damage.

Phyrexia: All Will Be One changed a bunch of things. As the spiritual successor to New Phyrexia, poison was bound to show up in the set. The introduction of the toxic mechanic added a bunch of cards that can not only poison players but also deal damage, like the old poison cards would. New spells that can poison players were printed in ONE, like Infectious Inquiry and Prologue to Phyresis.

How Many Poison Counters Can You Get Before You Lose?

You lose the game when you get your 10th poison counter in all formats, with one exception. In Two-Headed Giant you lose the game after receiving 15 poison counters.

What About Poison Counters in EDH? Is it Still 10 Poison Counters?

Yes, Commander follows the Constructed rules in which you lose the game when you get your 10th poison counter.

Is Poison the Same as Infect?

The counters given to players with poison and infect are the same, but the abilities that give them are different.

Poison is usually tied to a triggered ability. Let’s look at Pit Scorpion as an example. If it goes unblocked and deals damage to a player when it attacks a trigger goes on the stack to give the player damaged by it a poison counter. But when it comes to infect, the damage is converted into poison counters instead of traditional damage without using the stack.

Creatures that give poison counters that don’t have infect also deal damage to other creatures as normal while infect creatures give -1/-1 counters to creatures in combat as a replacement for normal damage.

Poison vs. Toxic

As in the comparison with infect, both poison and toxic give poison counters to a certain opponent, but in different ways.

Toxic is a creature mechanic that deals combat damage to a player in two ways: in life based on the creature's power, and N poison counters based on the creature's toxic N attribute. This allows players to mix and match cards that deal damage, poison counters, and effects like proliferate, all in the same deck.

Toxic is the same as poisonous, which appeared on two cards from Future Sight, just developed with a new name, more cards, and the right context.

Do Poison Counters Stack?

Yes, poison counters are cumulative, which is the only way you'd usually be able to win with poison.

Is There a Way to Double Poison Counters?

Any counter-doubling effect can double poison counters so long as the doubling effect actually affects counters being placed on a player, like Vorinclex, Monstrous Raider. Doubling Season, however, will not double poison counters since it only doubles counters on permanents.

If a card like Strionic Resonator doubles the poison trigger it also leads to two instances of the trigger and doubles the number of counters added.

Can You Proliferate Poison Counters?

You can absolutely proliferate poison counters. In fact, one of proliferate’s main uses in the latest Mirrodin block was to proliferate poison counters and kill opponents. Cards like Throne of Geth have seen play in Hardened Scales in Modern to spread +1/+1, -1/-1, and poison counters with proliferate.

What Are Some Ways to Prevent Poison?

If you fog the damage that would be dealt by creatures with toxic or infect, they won’t deal damage, which means no poison counters. Cards that prevent opponents from putting counters on other players like Vorinclex, Monstrous Raider can prevent poison counters.

Melira, Sylvok Outcast can also prevent poison counters, but it forces infect creatures to deal regular damage instead. Normal combat damage happens with poison creatures but the player just doesn’t gain a new poison counter when the trigger resolves.

Solemnity also prevents poison counters.

Does Poison Count as Combat Damage?

Yes, poison creatures have to deal combat damage, which is then turned into poison counters. When it comes to older poison creatures, the damage is dealt and then a trigger adds the poison counters.

For the newer infect creatures, the damage is replaced by poison or -1/-1 counters (depending on what the creature is attacking). It still deals damage, it’s just in a different form. It still counts as combat damage.

What Kills You First, Damage or Poison Counters?

The unique wordings associated with older poison cards versus newer infect cards determines the answer to this question: Poisonous creatures kill you with normal damage before the poison trigger has a chance to resolve while infect creatures don’t.

If you were at 1 life and nine poison counters and Glistener Elf attacked you, you’d die to poison counters. Infect only deals the damage as poison counters, never as traditional damage (unless poison counters can’t be added).

If you were in the same scenario but Pit Scorpion was attacking rather than the elf, you’d die to combat damage before the trigger to add a poison counter went on the stack.

With Blightbelly Rat thrown in the mix you’d kill your opponent in 10 turns with poison damage (because of toxic 1) and combat damage (because the creature has 2 power).

Does Melira Remove Poison Counters?

Melira, Sylvok Outcast doesn’t remove poison counters, it just prevents you from gaining any more poison counters while it’s in play and under your control. It also protects your creatures by stopping -1/-1 counters from being placed on them, though it strips infect from your opponents’ creatures to start with.

On the other hand, Melira, the Living Cure states that no matter how many poison counters you would get in a given turn, you’ll actually only get one. So it still doesn't remove the poison counters, just limits how many you can get each turn.

Can Poison Counters be Removed?

Yes, the ability to remove poison counters from a player is a fairly rare ability. Cards like Final Act, Leeches, and Suncleanser can achieve this.

Is Poison Really That Bad?

Poison counters are fair game, but many players feel they are unfair. Largely because other things can be interacted with, but it is extremely difficult to stop poison once it takes root.

Gallery and List of Poison Cards

In addition to cards that have infect or toxic, these are cards that can put poison counters on a player:

• Crypt Cobra
• Sabertooth Cobra
• Suq'Ata Assassin
• Pit Scorpion
• Marsh Viper
• Swamp Mosquito
• Serpent Generator
• Hand of the Praetors
• Ichor Rats
• Relic Putrescence
• Virulent Wound
• Pistus Strike
• Decimator Web
• Caress of Phyrexia
• Reaper of Sheoldred
• Fynn, the Fangbearer
• Ajani, Sleeper Agent
• Norn's Decree
• Phyresis Outbreak
• Prologue to Phyresis
• Infectious Inquiry
• Vraska, Betrayal's Sting
• Vraska's Fall
• Infectious Bite
• Etali, Primal Conqueror
• Etali, Primal Sickness
• Persuasive Interrogators
• Bloodroot Apothecary
• Virulent Silencer

There are other cards like Corrupted Resolve and Mycosynth Fiend that mention poison counters but don't actually distribute them. There are also corrupted payoffs that care about your opponents having three or more poison counters.

Best Poison Cards

Even though infect deals poison counters I’m not counting any infect cards for best poison cards. It’s in the name. That said, most of the cards that deal poison outside of infect creatures don’t stand up to the test of time.

#10. Bloodroot Apothecary

Bloodroot Apothecary wants to give out poison counters but instead entices them with treasure first. Of course those foods, clues, or other artifact tokens also count too so this is a great way to threaten with infected gifts.

#9. Ichor Rats

Ichor Rats is one of the most consistent ways to get the poison train rolling. Unfortunately for poison cards, three mana for a 2-power infect creature is decent.

#8. Vraska’s Fall

Like Prologue to Phyresis, you get some marginal benefit from Vraska's Fall in EDH because your opponents will sacrifice their worst creature to this edict effect, but it'll also give them a poison counter to start proliferating.

#7. Prologue to Phyresis

Prologue to Phyresis is a nice cantrip in proliferate and infect decks since it starts the infection. Decks that proliferate have another good target besides your +1/+1 counter creatures and planeswalkers.

Just beware of the other players’ rage since they all know that you need to die before the inevitable death by poison arrives.

#6. Infectious Bite

Infectious Bite fits so perfectly with infect creatures and the dealing out of that first poison counter is crucial to be proactive in a poison strategy.

#5. Skrelv's Hive

Skrelv's Hive represents a lot of toxic attackers and is a lot to deal with for very little life cost.

#4. Fynn, the Fangbearer

Fynn, the Fangbearer just needs an inch of advantage to eliminate a player when paired with fellow deathtouch creatures.

#3. Venerated Rotpriest

It doesn't scale with combat tricks like Glistener Elf, but Venerated Rotpriest is another good 1-drop in poison decks. It has the “protect my other creatures” clause and is devastating in multiples since killing one of them gives you two poison counters.

#2. Vraska, Betrayal’s Sting

It was bound to happen; a planeswalker with poison-related abilities. Vraska, Betrayal's Sting is a very nice top-end planeswalker if you’re interested in the poison route. Its 0 ability is drawing a card and proliferating (which also adds a loyalty counter), which slowly wins you the game.

Vraska's ultimate gets an opponent to nine poison counters, and a single attack or proliferate will finish things off from there.

#1. Etali, Primal Conqueror

It's kind of a joke that Etali, Primal Sickness has the Blightsteel Colossus style back-side, because Etali, Primal Conqueror is already an absurd card. Honestly, poison's not a huge selling point of the card, since the front side already does so much, but the option's nice to have and it's a very stylish way to take someone out.

Wrap Up

Pistus Strike | Illustration by Jaime Jones

Poison is an older mechanic that has since been updated with Mirrodin‘s infect creatures and “poisonous” on cards like Virulent Sliver and Snake Cult Initiation as well as the toxic creatures. It is far from evergreen among mechanics. While the original poison cards were my focus here, there’s a reason that most players recognize cards like Blighted Agent and Inkmoth Nexus but not Pit Scorpion. These cards don’t stand the test of time and they don’t create interesting or interactive gameplay. While alternate win conditions can be fun, I prefer cards like Door to Nothingness over poison-based cards.

I think we’ll continue to see cards that bolster infect and poison strategies through proliferate, doubling counters, etc., but I doubt we’ll see too many more unique infect cards. Poison counters aren’t an effect players clamor for and I’m certainly not looking to give the infect or poison decks that already exist a massive power level upgrade.

Do you use cards with poison outside of infect for any of your decks? Would you like to see poison counters return like in Kaldheim? Let me know in the comments or over on our Twitter.

Thank you for reading, and stay safe out there!