How does Evolve work in MTG?

Evolve is a triggered ability on creatures. Whenever any creature enters the battlefield under your control, it's compared to the creature with evolve. If the entering creature has greater power or greater toughness (or both) than the evolving creature, the evolving creature gets a +1/+1 counter. The comparison happens twice: once to see if the trigger fires, and once when the ability resolves.

Does Evolve trigger if the entering creature has greater power but less toughness?

Yes. Evolve triggers if the entering creature's power is greater than the evolving creature's power, or its toughness is greater — only one of those conditions needs to be true. A 3/1 entering alongside a 2/2 with evolve will trigger it, because power 3 is greater than 2, even though toughness 1 is less.

Can I use Giant Growth to make a creature qualify for Evolve after it enters?

No. The evolve trigger either fires or it doesn't at the moment the creature enters the battlefield. If neither the power nor toughness of the entering creature is greater than the evolving creature's stats at that moment, evolve doesn't trigger. You can't cast a pump spell after the fact to retroactively make it qualify.

What happens if multiple creatures enter the battlefield at the same time with Evolve?

Evolve triggers once for each entering creature that qualifies. However, each trigger is checked again independently when it resolves. The first trigger to resolve may put a +1/+1 counter on the evolving creature, making it larger — which can cause the second trigger to do nothing if the entering creatures are no longer larger than the now-grown evolving creature.

What set introduced Evolve?

Evolve was introduced in Gatecrash (January 2013) as the guild mechanic for the Simic Combine. It was designed by Ethan Fleischer during The Great Designer Search 2. It has since appeared in Ravnica: Clue Edition, the Warhammer 40,000 Commander Tyranid Swarm deck (2022), and Modern Horizons 3 (2024).

Does Evolving Adaptive from Phyrexia: All Will Be One use the Evolve keyword?

Not technically. Evolving Adaptive has the same trigger condition as evolve — it checks whether an entering creature has greater power or toughness — but it uses oil counters instead of +1/+1 counters and doesn't use the evolve keyword. It's a functional callback to the mechanic rather than an instance of it.

Evolve: The Complete MTG Mechanic Guide

There's something genuinely satisfying about watching a small creature grow into a threat over the course of a game, responding to every new arrival like it's learning from its peers. That's exactly the fantasy Evolve delivers - and it does it with an elegant simplicity that holds up even years after its debut.

Evolve is a keyword ability introduced in Gatecrash (2013) as the guild mechanic for the Simic Combine. It rewards you for playing a stream of increasingly large creatures, turning your early drops into snowballing threats that grow stronger as your board develops.

What is Evolve?

Evolve is a triggered ability on creatures. Whenever any creature enters the battlefield under your control, that creature is compared to the one with evolve. If the new arrival has greater power or greater toughness than the evolving creature, the evolving creature gets a +1/+1 counter.

The reminder text puts it cleanly: "Whenever a creature enters the battlefield under your control, if that creature has greater power or toughness than this creature, put a +1/+1 counter on this creature."

The core idea is that your creatures grow in response to competitive pressure - fitting for the Simic, a guild of biomancers obsessed with combining the best of nature with arcane engineering.

Lore aside: Evolve was originally designed by Ethan Fleischer during The Great Designer Search 2, explicitly inspired by the concept of organisms evolving in response to competitive pressure from other creatures around them. The thematic fit with the Simic is near-perfect.

Rules

The official rules for evolve live at CR 702.100. Here's what they say, and what they actually mean at the table.

How the trigger works

Evolve checks a creature's stats twice: once when the trigger would be created, and once when the ability tries to resolve. Both checks matter.

At trigger time: When a creature enters the battlefield under your control, compare its power to the evolving creature's power, and its toughness to the evolving creature's toughness. If neither stat is greater, evolve doesn't trigger at all.
At resolution time: The comparison happens again. If the new creature has left the battlefield before the trigger resolves, its last known power and toughness are used for this second check.

Rules note: You compare power to power and toughness to toughness - never cross-compare. A 1/5 creature entering the battlefield will trigger evolve on a 2/2, because the toughness (5) is greater than 2, even though the power (1) is not.

The stat comparison in full

Evolve triggers if the entering creature's power is greater than the evolving creature's power, or its toughness is greater - or both. Only one of those needs to be true.

Because the check happens twice, there are some interesting interactions:

If a creature enters as a 1/3, triggering evolve on your 2/2 (because toughness 3 > 2), and then someone pumps the 1/3 to a 3/1 in response, the trigger still resolves. The stat that "mattered" has shifted from toughness to power, but the ability still sees a stat that's greater than the evolving creature's.
If multiple creatures enter at the same time, evolve triggers once for each of them - but each trigger is checked independently when it resolves. After the first counter lands, your evolving creature is bigger, so the second trigger might do nothing.

Creatures entering with counters

If a creature enters with +1/+1 counters on it, those counters count toward its power and toughness for the evolve comparison. A 1/1 that enters with two +1/+1 counters on it is effectively a 3/3 for this purpose, and will trigger evolve on a 2/2.

Multiple instances of evolve

If a creature has evolve more than once - say, because Tyranid Prime gave it the ability in addition to its own printed evolve - each instance triggers separately.

Rules note: A creature can't have a greater power or toughness than a noncreature permanent. This is a corner-case rule (CR 702.100c) that mostly matters if you're doing unusual things with noncreature comparisons.

What evolve doesn't do

Evolve only cares about creatures entering the battlefield under your control. Opponents' creatures entering don't count. Creatures you already control that grow in size don't retrigger it. And there's no way to "preemptively" respond to the trigger's existence - if the trigger doesn't fire (because neither stat is greater), you can't cast Giant Growth on the entering creature to make it qualify after the fact.

Strategy

Building around Evolve

Evolve rewards a specific kind of deck-building discipline: you want a curve of creatures where each new creature is bigger than the last, or at least bigger in one stat than whatever's already on board.

The cleanest way to build around evolve is to think about your creatures in two groups:

Evolve creatures: Usually cheaper and more fragile, but with abilities that make them worth protecting as they grow. These want to be played early.
Enablers: Larger creatures that come down later, reliably triggering your evolve creatures. These can be straightforwardly powerful threats - the triggers are a bonus.

A common trap is running a deck full of evolve creatures with similar stats. If your 2/2 and your 2/2 evolve at the same time, neither grows. You need genuine size variance across the curve.

Playing with Evolve

Sequencing matters a lot. Play your evolve creatures before your larger creatures, not alongside them. A creature with evolve that enters an empty board will never grow from that turn - it needs something smaller to precede it and something larger to follow.

Spells that temporarily pump creatures (like combat tricks) don't retroactively trigger evolve, but entering creatures that carry counters do. Cards that put +1/+1 counters on creatures as they enter - Branching Evolution doubling those counters, for instance - can create evolve triggers from creatures that wouldn't otherwise qualify.

Playing against Evolve

The pressure point for evolve decks is the early creatures. A 1/1 or 2/2 with evolve is not a threat by itself - it becomes one after several triggers. If you can answer those small creatures before they've had a chance to grow, you've cut the engine off at the root.

If removal is scarce, prioritising flying or reach answers can at least prevent the evolve creatures from attacking effectively, even if they're growing large on the ground.

Format check: Evolve sees most of its competitive play in Modern and Legacy, primarily in Simic-based creature decks. It's not currently a Standard-legal mechanic as of this writing, but it has appeared in supplemental products and reprint sets.

Notable Cards

Tyranid Prime

Tyranid Prime ({1}{G}{U}) is the most important evolve-granting card in existence - it gives every other creature you control evolve via its Synapse Creature ability. In a deck where multiple creatures are growing simultaneously, this can create cascading triggers across your entire board. It appeared in the Warhammer 40,000 Commander (2022) Tyranid Swarm deck.

Propagator Drone

Propagator Drone is notable for creating creature tokens that also carry evolve, letting the mechanic spread across a wide board in the Tyranid theme.

Evolving Adaptive

Evolving Adaptive ({G}) from Phyrexia: All Will Be One (2023) is a functional callback to evolve that uses oil counters instead of +1/+1 counters. It's not evolve in the rules-keyword sense, but the trigger condition is identical - a creature entering with greater power or toughness. It's a reminder of how durable the underlying design idea is, even when the keyword doesn't appear.

Branching Evolution

Branching Evolution ({2}{G}) isn't an evolve card, but it's the best support card for evolve decks in formats where it's legal. Doubling every +1/+1 counter placed on your creatures turns a single evolve trigger into a disproportionate size spike.

History of Evolve

Evolve was introduced in Gatecrash (January 2013) as the signature mechanic of the Simic Combine, one of the ten guilds in Magic's Ravnica setting. The Simic are a blue-green faction obsessed with biological perfection - combining the adaptability of nature with the precision of science - and evolve fit their identity perfectly.

The mechanic was designed by Ethan Fleischer during The Great Designer Search 2, with the explicit inspiration of creatures evolving in response to competitive pressure from other organisms.

After its debut in Gatecrash, evolve was revisited in:

Ravnica: Clue Edition - A supplemental set that returned to the Ravnica plane and brought back several guild mechanics.
Warhammer 40,000 Commander Decks (2022) - The Tyranid Swarm deck used evolve as a thematic fit for the Tyranids, a faction defined by biological adaptation and growth in response to the enemies they fight. Tyranid Prime and Propagator Drone grant the mechanic to other creatures.
Modern Horizons 3 (2024) - Evolve returned again, showing the mechanic still has design space worth exploring.

Beyond the keyword itself, evolve's design DNA has clearly influenced later cards. Evolving Adaptive from Phyrexia: All Will Be One and Sharp-Eyed Rookie from Murders at Karlov Manor (MKM) both use the same conditional trigger - "if that creature has greater power or toughness than this creature" - without using the keyword. Sharp-Eyed Rookie adds an investigation trigger on top, showing how the base mechanic can be extended with bonus effects. ✨