Replacement Effects in MTG
How "instead" effects work, why they never use the stack, and what happens when multiple replacements compete for the same event.
- What Are Replacement Effects?
- How to Identify Replacement Effects
- Replacement Effects vs. Triggered Abilities
- Common Replacement Effects
- "As Enters" Effects — Choosing Characteristics
- Self-Replacement Effects
- Multiple Replacement Effects on One Event
- Prevention Effects as Replacement Effects
- Dies vs. Exile Replacement
- Replacement Effects and Enters-the-Battlefield
- Common Misconceptions
- Related Guides
What Are Replacement Effects?
A replacement effect is a continuous effect that watches for a particular event and replaces that event with a different one. Rather than allowing the original event to happen and then reacting to it, a replacement effect modifies the event before it occurs. The original event never happens at all — only the modified version takes place. CR 614.1
This is a fundamental distinction in Magic rules. When Rest in Peace says "If a card or token would be put into a graveyard from anywhere, exile it instead," the card never touches the graveyard. It goes directly to exile. Any ability that would trigger from a card entering the graveyard does not trigger, because that event never happened. The replacement changed the event itself, not the outcome after the fact.
Replacement effects are defined by CR 614, with prevention effects (a special subset) covered by CR 615, and the rules for choosing between multiple applicable replacements in CR 616.
How to Identify Replacement Effects
Replacement effects are identified by specific language in their oracle text. The Comprehensive Rules define three key textual indicators. CR 614.1a-c
- "Instead" — The most common indicator. "If [event] would happen, [modified event] instead." Example: Leyline of the Void says "If a card would be put into an opponent's graveyard from anywhere, exile it instead."
- "As [this] enters the battlefield" — Used for effects that require a choice as a permanent enters. These are replacement effects that modify the enter-the-battlefield event itself. Example: Clone says "As Clone enters the battlefield, you may choose a creature on the battlefield. If you do, Clone enters the battlefield as a copy of that creature."
- "Skip" — Used for effects that replace an entire step or phase with nothing. Example: Stasis says "Players skip their untap steps." The untap step is replaced by nothing — it simply does not happen. CR 614.1b
- "Enters the battlefield with" — Used for permanents that enter with counters or in a modified state. Example: Arcbound Ravager says "Arcbound Ravager enters the battlefield with a +1/+1 counter on it." This replaces the normal enter-the-battlefield event with one that includes the counter.
If an ability's text does not use one of these phrasings, it is almost certainly not a replacement effect. Abilities that say "when" or "whenever" are triggered abilities, which work very differently.
Replacement Effects vs. Triggered Abilities
The most important distinction to understand is that replacement effects do not use the stack. They are not triggered, they cannot be responded to, and they do not wait for priority. They modify an event at the moment it would occur, seamlessly and invisibly to the game's priority system. CR 614.4
Triggered abilities, by contrast, use "when," "whenever," or "at" language. They trigger after an event occurs, go on the stack, and can be responded to by both players before they resolve.
Doubling Season (replacement): "If an effect would create one or more tokens under your control, it creates twice that many of those tokens instead." This modifies the token-creation event before it happens. No player can respond to the doubling — the doubled number of tokens simply appear.
Panharmonicon (triggered ability): "If an artifact or creature entering the battlefield causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time." Despite its similar feel, Panharmonicon does not replace anything. It causes an extra trigger to go on the stack. Opponents can respond to each trigger individually.
This distinction matters enormously. With Doubling Season, the doubled tokens all enter simultaneously as one event. With Panharmonicon, there are two separate triggers on the stack that resolve independently and can each be countered (by Stifle, for example) or responded to.
Common Replacement Effects
"If an effect would create one or more tokens under your control, it creates twice that many of those tokens instead. If an effect would put one or more counters on a permanent you control, it puts twice that many of those counters on that permanent instead."
Two separate replacement effects on one card. Each modifies a different event (token creation and counter placement). Note the word "effect" — Doubling Season only doubles tokens and counters created by effects, not by costs or state-based actions. A creature entering with its own +1/+1 counters (like a creature with "enters with X +1/+1 counters") is doubled, because that is an effect. But paying a cost of removing a counter is not replaced. CR 614.1a
"If a card or token would be put into a graveyard from anywhere, exile it instead."
This replaces all graveyard entries — from dying, being discarded, being milled, being countered, anything. Creatures do not "die" under Rest in Peace because dying means being put into a graveyard from the battlefield (CR 700.4), and that event never happens. Death triggers like "When this creature dies" will not trigger. CR 614.1a
"If a card would be put into an opponent's graveyard from anywhere, exile it instead."
Similar to Rest in Peace but one-directional: it only replaces cards going to opponents' graveyards. Your own cards enter your graveyard normally. This asymmetry is important for building around graveyard synergies while disrupting opponents.
"If damage would be dealt to another creature you control, prevent that damage. Put a +1/+1 counter on that creature for each 1 damage prevented this way."
Vigor combines a prevention effect with an additional modification. The damage is prevented (never dealt), and counters are placed instead. Because the damage is prevented, effects that trigger on damage being dealt (like lifelink or deathtouch lethality checks) do not apply. The counters are placed as part of the replacement, not as a separate triggered ability. CR 615.1
"As Enters" Effects — Choosing Characteristics
Some replacement effects modify how a permanent enters the battlefield by requiring a choice at the moment of entry. These use the phrase "As [this permanent] enters the battlefield" and are replacement effects that modify the enter-the-battlefield event. The choice is made as the event happens, not before or after. CR 614.1c
"As Clone enters the battlefield, you may choose a creature on the battlefield. If you do, Clone enters the battlefield as a copy of that creature."
The copy choice is made as Clone enters. It never exists on the battlefield as "Clone" — it enters already being a copy of the chosen creature. This means any enter-the-battlefield triggers it has will be those of the copied creature, not Clone's own. Because this is a replacement effect, no player gets priority between the choice and Clone entering as the copy.
"As Metallic Mimic enters the battlefield, choose a creature type."
The creature type is chosen as part of the entry event. Metallic Mimic is never on the battlefield without a chosen type. This choice cannot be responded to because it is part of a replacement effect, not a triggered ability. Once on the battlefield, the chosen type is locked in and cannot be changed.
Because "as enters" effects are replacement effects, they interact with other replacement effects that modify entering the battlefield. If multiple replacement effects want to modify the same enter-the-battlefield event, the affected player (typically the permanent's controller) chooses the order in which they apply. CR 616.1
Self-Replacement Effects
A self-replacement effect is a replacement effect that modifies an event generated by the same ability or effect that contains it. These have a special rule: self-replacement effects are always applied first, before any other replacement effects have a chance to apply. CR 614.15
Consider a spell that says "Draw two cards, then discard a card. If you would draw a card this way, instead look at the top two cards of your library, put one into your hand and the other on the bottom of your library." The second sentence is a self-replacement effect — it replaces the draw created by its own effect. This self-replacement applies before any external replacement effects (like Notion Thief's "If an opponent would draw a card except the first one they draw in each of their draw steps, instead that player skips that draw and you draw a card instead").
The rule is intuitive: an effect's own internal modifications take priority because the effect is defining what it actually does. External replacements then apply to the already-modified event.
Another common example is cards that say "enters the battlefield tapped." This is a self-replacement effect on the permanent's own entry. It modifies the enter-the-battlefield event, and it applies before other replacement effects that might also want to modify how the permanent enters.
Multiple Replacement Effects on One Event
When two or more replacement effects want to apply to the same event, the game needs a way to determine which applies. The key rule is: the affected player or the controller of the affected object chooses which replacement effect to apply first. CR 616.1
After one replacement effect is applied, the event has been modified. The game then checks again: do any remaining replacement effects still apply to the now-modified event? If so, the affected player chooses again. This continues until no more replacement effects apply. Critically, a single replacement effect can only apply to a given event once. CR 614.5
- Self-replacement effects apply first (CR 614.15). These always take priority because they modify the effect's own output.
- Determine the affected player or controller. For an event affecting a player (like drawing cards or losing life), that player chooses. For an event affecting a permanent (like entering the battlefield), the permanent's controller chooses.
- The affected player chooses one of the applicable replacement effects to apply. The event is modified accordingly.
- Check again. If additional replacement effects still apply to the modified event, return to step 3. If not, the event occurs as modified.
You control Rest in Peace ("If a card or token would be put into a graveyard from anywhere, exile it instead"). Your opponent controls Leyline of the Void ("If a card would be put into an opponent's graveyard from anywhere, exile it instead"). One of your creatures would die.
Both replacement effects apply to the same event: your card going to the graveyard. You are the affected player (it is your card). You choose which replacement to apply. It doesn't matter much here because both result in exile, but the distinction matters for effects that care about which replacement was applied or who controls the replacement source.
You control both Doubling Season and Vorinclex, Monstrous Raider ("If you would put one or more counters on a permanent or player, put twice that many of each of those kinds of counters on that permanent or player instead"). An effect would place a +1/+1 counter on a creature you control.
Both replacements apply. You choose the order. If you apply Doubling Season first (1 becomes 2), then Vorinclex applies to the modified event (2 becomes 4). If you apply Vorinclex first (1 becomes 2), then Doubling Season applies (2 becomes 4). Either way, you end up with 4 counters. But with three or more such effects, the order can produce different results, so the choice matters.
Prevention Effects as Replacement Effects
Prevention effects are a subset of replacement effects that specifically prevent damage. They use the word "prevent" and follow all the same rules as other replacement effects — they do not use the stack, they modify the event before it occurs, and when multiple prevention effects apply, the affected player or controller chooses which to apply. CR 615.1
Common prevention effects include protection (which prevents all damage from sources with the named quality), Fog effects ("Prevent all combat damage that would be dealt this turn"), and regeneration shields (which replaced destruction with a sequence that includes tapping the creature, removing it from combat, and removing all damage). CR 615.6
A creature with protection from red would be dealt 3 damage by a red source while Vigor is also on the battlefield. Both the protection prevention and Vigor's prevention want to replace the same damage event. The controller of the creature chooses which to apply. If protection is chosen, the damage is prevented, and Vigor's replacement no longer applies (there is no damage left to prevent). If Vigor is chosen first, the damage is prevented and +1/+1 counters are placed instead.
An important nuance: prevention effects can only prevent damage that would actually be dealt. If damage is reduced to 0 or replaced by another effect first, there is nothing left for a prevention effect to prevent. The order of application chosen by the controller determines whether counters, lifegain, or other replacement outcomes occur.
Dies vs. Exile Replacement
One of the most frequently encountered replacement effects in competitive Magic is the "dies to exile" replacement. Cards like Rest in Peace, Leyline of the Void, Kalitas Traitor of Ghet, and Anafenza the Foremost all replace dying (going to the graveyard from the battlefield) with exile.
When such a replacement is in effect, the creature does not die. "Dies" in Magic means specifically "is put into a graveyard from the battlefield" (CR 700.4). If a replacement effect exiles the creature instead, the graveyard event never happens, so the creature did not die. This means:
- Death triggers do not trigger. "When this creature dies" abilities never fire because the creature was exiled, not put into a graveyard.
- "Whenever a creature dies" effects on other permanents also do not trigger. No creature died — it was exiled.
- The creature does go to exile. Any "When this creature is put into exile" or "When this creature leaves the battlefield" abilities will trigger, because those events did occur.
- Persist and undying do not trigger. These specifically require the creature to die (go to the graveyard), so the exile replacement shuts them off.
Your opponent controls Kitchen Finks (which has persist: "When this creature dies, if it had no -1/-1 counters on it, return it to the battlefield with a -1/-1 counter on it"). You control Kalitas, Traitor of Ghet ("If a nontoken creature an opponent controls would die, instead exile that creature and create a 2/2 black Zombie creature token").
Kitchen Finks would die. Kalitas replaces that event: instead of going to the graveyard, Kitchen Finks is exiled, and you create a 2/2 Zombie. Persist does not trigger because Kitchen Finks did not die — it was exiled. Your opponent does not get their Kitchen Finks back.
Replacement Effects and Enters-the-Battlefield
Replacement effects that modify how a permanent enters the battlefield are among the most complex in the game. These include "as enters" choices, "enters with counters" effects, and effects from other permanents that modify the entry of new permanents. CR 614.12
A key rule: when determining what replacement effects apply to a permanent entering the battlefield, the game looks at the permanent as it would exist on the battlefield, taking into account any copy effects or type-changing effects that are part of the entry. This means if a Clone enters as a copy of a creature with "enters the battlefield with a +1/+1 counter," it gets that counter. CR 614.12
You control Doubling Season. You cast a planeswalker with starting loyalty 4. Planeswalkers enter the battlefield with loyalty counters equal to their starting loyalty. Doubling Season sees counters being placed on a permanent you control and doubles them: the planeswalker enters with 8 loyalty counters instead of 4. This is a replacement effect, not a triggered ability, so no player can respond before the planeswalker has its doubled loyalty.
If Humility is on the battlefield ("All creatures lose all abilities and have base power and toughness 1/1") and a creature with "enters the battlefield with two +1/+1 counters" would enter, does it get the counters? Yes. Replacement effects that modify how a permanent enters the battlefield are applied before the permanent is on the battlefield. The game checks what the permanent will look like and applies entry replacements. The creature enters with its counters, and then Humility's continuous effect (applied via layers) removes its abilities and sets its base P/T to 1/1. The counters remain (they apply in sublayer 7c, after the 1/1 base in 7b), so the creature is a 3/3 with no abilities.
Common Misconceptions
Myth: "Replacement effects go on the stack and can be responded to."
Fact: Replacement effects never use the stack. They modify an event as it happens. No player receives priority between the original event and the replacement. This is one of their defining characteristics. CR 614.4
Myth: "Panharmonicon is a replacement effect because it doubles triggers."
Fact: Panharmonicon causes an additional trigger to occur. It is a triggered ability that creates an extra copy of a trigger on the stack. Each trigger can be responded to individually. Compare with Doubling Season, which is a true replacement effect that modifies token/counter events directly.
Myth: "The controller of the replacement effect chooses whether to apply it."
Fact: The affected player or controller of the affected object chooses which replacement effect to apply when multiple apply. The controller of the source of the replacement effect does not get to choose. This is defined by CR 616.1 and is essential for competitive play.
Myth: "A creature exiled by Rest in Peace still 'died' for purposes of death triggers."
Fact: If a creature would go to the graveyard and is exiled instead by a replacement effect, it did not die. "Dies" specifically means "put into a graveyard from the battlefield" (CR 700.4). Death triggers will not trigger because the trigger event (going to the graveyard) never occurred.
Myth: "You can apply the same replacement effect to an event multiple times."
Fact: A given replacement effect can apply to any particular event only once. After it has modified the event, it cannot apply again to the now-modified event, even if the modified event would still meet the replacement's conditions. CR 614.5
Have a Replacement Effect Question?
Ask the Pocket Judge rules engine — it handles replacement effects, prevention, and "instead" interactions automatically.
Ask a Ruling