Infusion in MTG: Rules, History, and Best Cards

Withering Curse | Illustration by Tuan Duong Chu

In the beginning, Witherbloom had magecraft, and MTG designers said it was good. But back in 2021, in the original Strixhaven: School of Mages, players didn’t have the same impression. Witherbloom seemed like a color pair that wanted to do different stuff, and although the lifegain was present as a subtheme, it wasn’t focused.

During our return to Arcavios in Secrets of Strixhaven, MTG designers heard the players. In 2026, Witherbloom has a main goal: to gain life, at least once every turn. That powers infusion, which is the mechanic we’re dissecting today.

How Does Infusion Work?

Moseo, Vein's New Dean | Illustration by Abz J Harding

Infusion is a MTG mechanic that cares if you gained life in a given turn. It's a yes or not mechanic: You either have it or not. This isn’t a whenever you gain life trigger, like Ajani's Pridemate. We can have creatures that enter the battlefield stronger or get additional benefits if the infusion condition is met.

For example, Old-Growth Educator only checks the infusion condition when it enters, and you’ll put +1/+1 counters on it as the mechanic’s benefit. Meanwhile, Ulna Alley Shopkeep checks each turn if you gained life, and if you did, it gets +2/+0. We also have instants and sorceries that become much more powerful if you gain life before casting them.

The History of Infusion in MTG

Infusion debuted in Secrets of Strixhaven (SOS) as the mechanic for the Witherbloom school. The main theme for Witherbloom is lifegain, and many cards have incidental lifegain or lifegain payoffs, mostly through infusion. The mechanic appears on 12 cards total, and all infusion cards have a green and/or black color identity. We have infusion in instants, sorceries, and creatures, across all rarities. There aren’t any infusion cards in the Secrets of Strixhaven Commander precons, so the mechanic hasn’t been reused outside of SOS.

Is Infusion a Triggered Ability?

No, it’s not. Infusion is actually an ability word. Triggered abilities happen whenever a certain condition is met, and infusion simply checks to see if something has already happened or not.

Note that infusion can be used as part of a triggered ability, for example on Moseo, Vein's New Dean.

Does Gaining More Life Trigger Infusion Multiple Times?

No. Infusion is either on or off, like morbid. You either gained life in a turn or not, regardless if one 1 of life or many. And the benefits from infusion don’t stack either, so it’s irrelevant if you gained life multiple times in a turn.

There is a single card, Moseo, Vein's New Dean, which gives you a bigger payoff via infusion if you gain more life, but the infusion mechanic doesn’t care about the amount of life.

Do Infusion Cards Need to “See” You Gain Life?

Infusion cards don’t need to “see” you gain life. In other words, the card doesn’t need to be on the battlefield the moment you gain life. So, if you gain 1 life at the beginning of your turn and you play an infusion card that triggers at your end step, infusion will work. It will work even if your life total is lower than it was at the beginning of the turn.

What If You Lose Life After You’ve Already Gained Life?

Infusion will still work in this case. Let’s say you gained 1 life, then you paid 2 life for an effect like Night's Whisper. Since infusion only cares if you gained life or not, it will be active.

Does Switching Life Totals Trigger Infusion?

It does, so long as exchanging life totals results in your life increasing. So, if you have 10 life and your opponent has 20 and you switch life totals with them, you've gained 10 life.

Gallery and List of Infusion Cards

• Foolish Fate
• Moseo, Vein's New Dean
• Poisoner's Apprentice
• Tragedy Feaster
• Ulna Alley Shopkeep
• Withering Curse
• Efflorescence
• Follow the Lumarets
• Lumaret's Favor
• Tenured Concocter
• Thornfist Striker
• Old-Growth Educator

Best Infusion Cards

#6. Poisoner’s Apprentice

Although this kind of effect sees more play in Limited than in Constructed, Poisoner's Apprentice is a nice addition to a lifegain deck, or decks that can trigger lifegain whenever a creature enters. Playing a creature that enters with a removal spell is solid.

#5. Thornfist Striker

We’re still in Limited territory with Thornfist Striker, but I can see a green and white go-wide deck in casual Commander that plays this as an anthem. A deck that plays a card like Hinterland Sanctifier and some tokens can play Thornfist Striker, turn infusion on, and give the benefits right away.  

#4. Follow the Lumarets

Follow the Lumarets is a basic card selection spell if you don’t have infusion. But if you do, this 2-mana sorcery can draw you a bunch of cards, some combination of two creatures or two lands. Pauper formats might be interested in a card like this.

#3. Tragedy Feaster

Tragedy Feaster actually works differently than other infusion cards that have extra or improved effects with infusion. It’s a massive 7/6 trampler for 4 mana that has a downside, but you can bypass said downside by gaining life. It’s a nice addition to aggressive black decks, and sometimes you’ll have something you actually want to sacrifice, like Demonic Pact, or something you’ve just stolen in a steal and sac deck.

#2. Moseo, Vein’s New Dean

Moseo, Vein's New Dean is a solid flier that enters with a Pest token. And each turn, if infusion is online, you get to bring back a creature with mana value equal to the amount of life you’ve gained that turn. So, if you crack a Food token and gain 3 life, you basically get Unearth. And if you attack with a big lifelink creature, you can reanimate something really strong, without those pesky finality counters. All in all, it’s a cool new legend to build a deck around, and it can see some Standard play as well.

#1. Withering Curse

Withering Curse can be a 3-mana Damnation, or an Infest otherwise. The key to this card is to have ways to gain life, preferably outside of the creature realm. It’s going to play great with the new Pest cards, the gainlands, or planeswalkers like Professor Dellian Fel, Food tokens, and more. Yes, many times you’ll have to pay mana to set up the lifegain, but at the same time, paying 2 mana to crack a Food, gain 3 life, and wrath the board afterwards may save you from an opposing board full of creatures. Outside Standard, you can set up your lifegain via cards like Cauldron Familiar, Cling to Dust, Pristine Talisman, and the like.

Wrap Up

Foolish Fate | Illustration by Danny Schwartz

And that’s it for infusion. It’s a simple Limited mechanic with implications for Constructed because there are pushed cards like Withering Curse. It should be very easy to trigger across all formats, and there are well-established archetypes that gain life. As for the mechanic, I don’t see it being a headliner in future sets; it's much easier to just template lifegain payoffs as normal triggered abilities.

Did you like this new focused lifegain-matters theme in Witherbloom? Should they have kept magecraft, or focused on another theme for Witherbloom? Let me know in the comments section below. And for more Secrets of Strixhaven coverage, check out Draftsim’s YouTube channel, The Daily Upkeep.

Until next time, stay safe!