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No. Under the 2014 fifth-edition rules, a creature that assumes the form of a legendary creature through polymorph does not gain that form’s legendary actions. The same rule also withholds the form’s lair actions and regional effects. The monster rules state this directly, so the presence of those entries in the target creature’s stat block does not create an exception. This answer is specifically for the 2014 rules text; the sources here do not establish how another edition should be adjudicated.
Does polymorph get legendary actions?
No. The 2014 monster rules contain an explicit restriction: “If a creature assumes the form of a legendary creature, such as through a spell, it doesn’t gain that form’s legendary actions, lair actions, or regional effects.” You can read the rule in the 2014 Basic Rules monster rules.
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That sentence controls the result even when the assumed form’s stat block lists legendary actions. A character, monster, or other creature transformed into that form may use the ordinary capabilities that polymorph gives it, subject to the spell’s restrictions, but it does not acquire the legendary-action section merely by changing shape.
What does the 2014 legendary-creature rule say?
The wording is broader than a simple “no legendary actions” answer. It identifies three separate categories that do not transfer when a creature assumes a legendary creature’s form through a spell:
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- Legendary actions: the special actions a legendary creature can take outside its own turn, normally using the timing and limits printed in its stat block.
- Lair actions: environmental actions associated with the creature’s lair and normally tied to initiative or a specific location.
- Regional effects: ongoing supernatural effects that influence the area around a legendary creature’s domain.
Because the rule names all three, a ruling that denies legendary actions but grants lair actions or regional effects would not follow the text. The exclusion applies to the assumed form’s versions of each feature.
Why doesn’t the target stat block grant those actions?
Polymorph changes the creature into a new form; it does not erase the separate rule that limits what happens when that form is legendary. The spell’s text says the target’s game statistics are replaced by those of the chosen beast, with the spell’s listed exceptions and restrictions. It also limits the actions available to the new form and addresses speech, spellcasting, and actions that require hands or speech. The spell is presented in the 2014 Basic Rules spell rules.
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The legendary-creature sentence is a specific monster-rule limitation for this situation. In practical terms, you read both rules together: determine what the new form normally supplies, then remove the legendary actions, lair actions, and regional effects that the monster rule expressly says the transformed creature does not gain.
A stat block is therefore not an automatic package of every entry printed on the page. The fact that a form has a legendary-action paragraph tells you what that creature can do when it is functioning as that legendary creature under the monster rules. It does not override a rule that denies those features when another creature reaches the form through a spell.
What can a polymorphed creature do instead?
The creature uses the ordinary capabilities allowed by the spell and the assumed form, not the form’s legendary-action routine. The exact result depends on the form selected and on the spell’s restrictions, but the legendary-action entry itself is unavailable.
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For adjudication, separate these questions:
- What form did the spell create? Identify the statistics and ordinary actions supplied by that form under the 2014 polymorph text.
- Does the action require a feature the spell restricts? The spell limits speech, spellcasting, and actions requiring hands or speech unless the new form can perform them as permitted by the spell.
- Is the proposed ability a legendary action, lair action, or regional effect of the assumed legendary creature? If so, the monster rule excludes it.
- Is it an ordinary action or trait of the new form that is not one of those excluded categories? If the spell otherwise permits it, resolve it using the normal rules for that form.
This checklist prevents a common mistake: treating the transformation as an all-or-nothing import of the target stat block. The form can matter for ordinary statistics and actions while still being barred from the legendary portion of the stat block.
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No. A legendary action is a distinct rules category, not a synonym for any powerful action in a monster’s stat block. The rule’s explicit wording matters because it targets the category by name.
If a creature’s stat block contains an action in its normal Actions section, that is not automatically a legendary action. Conversely, an entry in the Legendary Actions section remains unavailable to a creature that assumes the form through polymorph. Do not reclassify a legendary action as an ordinary action simply because the transformed creature has the same shape or statistics.
The same classification principle applies to lair actions and regional effects. A power associated with the creature’s location or surrounding territory does not become available merely because the creature is physically present in that form, and the regional effect does not follow the transformed creature as a personal aura.
Does the rule also remove lair actions?
Yes. The 2014 rule names lair actions alongside legendary actions, so a creature transformed into a legendary form cannot use that form’s lair-action rules.
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Lair actions are tied to the creature’s lair and are presented separately from the monster’s ordinary turn-based actions. Even if the transformation occurs in the legendary creature’s own lair, the spell does not grant the assumed form’s lair-action package. The location may still matter to the encounter for other reasons, but the transformed creature cannot claim the excluded lair actions as a consequence of polymorph.
Does a polymorphed legendary creature create regional effects?
No. Regional effects are the third category expressly excluded by the rule. They are environmental or territorial consequences associated with a legendary creature’s domain, not ordinary personal abilities that automatically travel with the creature.
This distinction matters when a spellcaster transforms near a region influenced by a legendary creature. The transformed character does not gain the creature’s regional effects, and transforming elsewhere does not establish a new region. The rule is about what the assumed form grants the creature; it is not a mechanism for transferring the setting-wide consequences of a legendary monster.
Can the original creature still cast spells while polymorphed?
The 2014 guidance treats spellcasting separately from the legendary-action restriction. The Sage Advice Compendium explains that a transformed creature cannot cast spells while it is in the polymorphed form, while the spell does not prevent concentration on a spell cast before the transformation.
That guidance does not create an exception for legendary actions. A creature cannot use spellcasting to bypass the legendary-creature rule, and retaining concentration on an earlier spell does not grant the assumed form’s legendary, lair, or regional features. Treat concentration and legendary actions as separate rules questions.
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What if the creature was already legendary before the transformation?
The cited rule addresses the form assumed through a spell. It does not say that a creature’s original identity can manufacture legendary actions for a different form. When resolving the spell, apply the statistics and restrictions of the new form, then apply the explicit exclusion for that form’s legendary actions, lair actions, and regional effects.
If a table is considering a special edge case not covered by the supplied text—for example, a homebrew transformation, a nonspell effect, or a feature that independently grants an action—the Dungeon Master should identify the exact granting rule rather than infer an answer from the target monster’s stat block. The 2014 sentence is clear about the legendary creature’s own features, but it does not rewrite unrelated abilities that might come from another source.
How should a Dungeon Master adjudicate a disputed action?
Use the stat block’s labels and the source of the ability. Ask the player to identify the exact entry they want to use, then classify it before resolving its mechanics.
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- Find the entry. Is it in the monster’s ordinary Actions section, Legendary Actions section, lair-action text, or regional-effects text?
- Apply the spell’s form limits. Check whether the form can perform the action and whether it requires speech, hands, or spellcasting that the spell does not allow.
- Apply the specific exclusion. If the entry belongs to the assumed legendary creature’s legendary actions, lair actions, or regional effects, deny it under the 2014 monster rule.
- Explain the ruling narrowly. The refusal is not a judgment about how strong the action is; it follows from the named category in the rule.
A concise table ruling might be: “Polymorph gives you the new form’s permitted statistics and ordinary actions, but the 2014 monster rules specifically withhold that form’s legendary actions, lair actions, and regional effects.” This keeps the decision tied to the text instead of to assumptions about challenge rating or narrative power.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Does the answer change in another edition?
The evidence summarized here is for the 2014 fifth-edition rules. The cited Basic Rules, Sage Advice Compendium, and Monster Manual errata material do not settle the wording of every other edition or revision. If your group is using a different rules release, check that edition’s polymorph wording and monster rules directly rather than importing the 2014 answer without verification.
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The 2014 Monster Manual errata identifies the legendary-creature-form restriction as an update to the monster rules; the relevant errata material is available in the 2014 Monster Manual Sage Advice and Errata. When citing the rule at a table, specify “2014 rules” so everyone knows which text is being applied.
Common mistakes about polymorph and legendary actions
- “The stat block has the feature, so the form has it.” Not here. The specific rule removes the assumed form’s legendary actions, lair actions, and regional effects.
- “Legendary actions are just extra attacks.” They are a separate category with their own heading and timing. Replacing a legendary action with an ordinary action changes the rule.
- “Being in the lair restores the lair actions.” The restriction is not limited to travel or distance. The assumed form does not gain that form’s lair actions.
- “Concentration means the creature keeps all its old powers.” Concentration on a spell cast before transformation is a separate issue from gaining the new form’s excluded features.
- “This must apply to every edition.” The answer here is expressly scoped to the 2014 fifth-edition text.
What is the final ruling?
Under the 2014 fifth-edition rules, polymorph does not grant legendary actions when a creature assumes the form of a legendary creature. The same explicit restriction removes that form’s lair actions and regional effects. Resolve the transformation using the spell’s ordinary form rules and restrictions, and do not treat the target stat block’s legendary section as transferable.
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Can a polymorphed creature use a legendary creature’s normal actions?
It can use ordinary actions of the assumed form only when the spell otherwise permits them. The ban is specifically on that form’s legendary actions, lair actions, and regional effects, so an entry in the normal Actions section must still be checked against the spell’s speech, hands, and other limits.
Does polymorph remove concentration on a spell already running?
The Sage Advice Compendium says the transformation does not prevent concentration on a spell cast before the change. That retained concentration does not restore spellcasting or grant any legendary-creature features.
Do regional effects follow the transformed character to a new location?
No. Regional effects are expressly excluded from the assumed legendary form, and they are environmental effects associated with a territory rather than personal abilities that travel with the character.
Where can I verify the 2014 restriction in the rules?
The sentence appears in the 2014 monster rules on D&D Beyond and is also identified in the 2014 Monster Manual errata material. The 2014 spell rules provide the separate form and action restrictions for polymorph.
