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{{Pottermore}}
 
{{Spell infobox
 
{{Spell infobox
 
|name=Undetectable Extension Charm
 
|name=Undetectable Extension Charm
 
|image=[[File:UndetectableExtensionCharm.jpg|250px]]
 
|image=[[File:UndetectableExtensionCharm.jpg|250px]]
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|incantation=''Capacious extremis''<ref name="PM">''[[Pottermore]]'' - [http://www.pottermore.com/en/book7/chapter14/moment1/extension-charm New from J.K. Rowling: "Extension Charms"]</ref>
|incantation=
 
 
|type=[[Charm]]
 
|type=[[Charm]]
 
|hand=
 
|hand=
 
|light=
 
|light=
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|effect=Simultaneously makes things bigger on the inside whilst magically disguising this effect.
|effect=Expands internal space of an object.
 
 
}}
 
}}
 
{{dialogue a-b-c-b|Harry|When you say you've got the Cloak, and clothes... |Hermione|Yes, they're here.|Ron|How the ruddy hell – ?|Undetectable Extension Charm. Tricky, but I think I've done it okay; anyway, I managed to fit everything we need in here.|[[Hermione Granger]] explaining her use of the [[charm]] in [[1997]]|Harry Potter and the Deathly Hallows}}
 
{{dialogue a-b-c-b|Harry|When you say you've got the Cloak, and clothes... |Hermione|Yes, they're here.|Ron|How the ruddy hell – ?|Undetectable Extension Charm. Tricky, but I think I've done it okay; anyway, I managed to fit everything we need in here.|[[Hermione Granger]] explaining her use of the [[charm]] in [[1997]]|Harry Potter and the Deathly Hallows}}
   
The '''Undetectable Extension Charm''' (''incantation unknown'') is a [[charm]] placed on any object to make the internal space larger than the external object appears. It is possible that it, or similar types of magic are widely used throughout the wizarding world to help conceal the wizarding world from the muggle world.
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The '''Undetectable Extension Charm''', or simply '''Extension Charms''' (''Capacious extremis''<ref name="PM"/>) is a [[charm]] that extends the internal dimensions of the target object without affecting the external dimensions.
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== History of use ==
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Undetectable Extension Charms are advanced spells, but are subject to strict [[British Ministry of Magic|Ministry of Magic]] controle, because of its potential to create breaches of the [[International Statute of Wizarding Secrecy]]. There is a law in place (which is strictly enforced) that Extension Charms are not to be cast for private use, but only for the production of objects (such as school trunks and family tents), which have been individually approved for manufacture by the relevant Ministry Department.<ref name="PM"/> Hogwarts school trunks, like the majority of wizarding luggage, are issued with these charms.<ref name="PM"/>
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The Extension Charm can be used on [[car]]s. [[Arthur Weasley]] used this spell, among others, on his [[Flying Ford Anglia]]. It was able to fit all of the [[Weasley family|Weasleys]] living at [[the Burrow]] [[1992|at that time]], [[Harry Potter]], and all of their luggage comfortably. [[Molly Weasley|Molly]] did not recognise it for what it was, stating "[[Muggle]]s do know more than we give them credit for, don't they?" [[Mundungus Fletcher]] cast this spell on an automobile he stole on [[Christmas]] of [[1995]] to transport the Weasleys and company to [[St. Mungo's Hospital for Magical Maladies and Injuries]]. It managed to fit all of the above minus Arthur and [[Percy Weasley|Percy]], as well as [[William Weasley]], [[Hermione Granger]], [[Alastor Moody]], [[Remus Lupin]], and Mundungus himself.<ref>''[[Harry Potter and the Order of the Phoenix]]'' - Chapter 23 (''Christmas on the Closed Ward'')</ref>
   
==Known and possible uses==
 
 
[[Hermione Granger]] used this [[charm]] on her [[Hermione Granger's handbag|small beaded handbag]] in [[1997]] so that she was able to pack all the supplies she believed she would need while hunting down [[Tom Riddle|Lord Voldemort]]'s [[Horcrux]]es with [[Harry Potter]] and [[Ronald Weasley|Ron Weasley]]. This included books, changes of clothes, money, Harry's [[Cloak of Invisibility]], and healing supplies.<ref name="DH9">''[[Harry Potter and the Deathly Hallows]]'', Ch. 9</ref> Eventually, Hermione also placed the [[Portraits|portrait]] of [[Phineas Nigellus Black]] that had previously been in [[12 Grimmauld Place]] in her bag as well<ref name="DH12">''Deathly Hallows'', Ch. 12</ref> to prevent [[Severus Snape]] from spying on them.
 
[[Hermione Granger]] used this [[charm]] on her [[Hermione Granger's handbag|small beaded handbag]] in [[1997]] so that she was able to pack all the supplies she believed she would need while hunting down [[Tom Riddle|Lord Voldemort]]'s [[Horcrux]]es with [[Harry Potter]] and [[Ronald Weasley|Ron Weasley]]. This included books, changes of clothes, money, Harry's [[Cloak of Invisibility]], and healing supplies.<ref name="DH9">''[[Harry Potter and the Deathly Hallows]]'', Ch. 9</ref> Eventually, Hermione also placed the [[Portraits|portrait]] of [[Phineas Nigellus Black]] that had previously been in [[12 Grimmauld Place]] in her bag as well<ref name="DH12">''Deathly Hallows'', Ch. 12</ref> to prevent [[Severus Snape]] from spying on them.
   
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=== Possible uses ===
The same, or a similar, spell was used to make [[British Ministry of Magic|Ministry of Magic]] [[Ministry cars|cars]], tents at the [[Quidditch World Cup]], the [[Knight Bus]], and [[Alastor Moody]]'s trunk larger on the inside.
 
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* The same or a similar spell was used to make [[Alastor Moody]]'s trunk larger on the inside.
 
* This was possibly used also with the [[Cast-a-Spell Kit]] because it holds a training room.
   
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==Effect==
This was possibly used also with the [[Cast-a-Spell Kit]] because it holds a training room.
 
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This sophisticated charm has two main effects: to expand an object's internal space while retaining its external dimensions. The charm also magically disguises itself so that no one but the caster (and those the caster confides about the charm in) can realise that this spell has been cast over the object, even if they are experiencing it.
   
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==Etymology==
It is also possible that it is used to make rooms/buildings bigger on the inside. A high possibility of such a use is on the Azkaban prison interior in attempt to make room for prisoners. Another possibility of use is to help the concealment of the wizarding world, so the wizards can enjoy large areas inside small recepticles.
 
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The incantation ''Capacious extremis'' comes from a corruption of the English words "capacity" and "spacious", and the Latin ''extrēmus'', meaning "extreme".
   
 
==Behind the scenes==
 
==Behind the scenes==
*The effects of this spell is similar to the effects of a [[Wikipedia:Bag of holding|Bag of Holding]] in many role playing game scenarios and the [[Wikipedia:TARDIS|TARDIS]] in [[Wikipedia:Doctor Who|''Doctor Who'']].
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* The effects of this [[spell]] are similar to the effects of the [[Wikipedia:TARDIS|TARDIS]] in [[Wikipedia:Doctor Who|''Doctor Who'']].
*The effects of the spell is also similar to Mary Poppins's carpet bag.
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* The effects of the spell are also very similar to Mary Poppins's carpet bag.
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* This charm appears to have a number of interesting side-effects when cast over an object. For example, when Hermione drops the bag she has cast this charm over in ''[[Harry Potter and the Deathly Hallows]]'' it makes a suspiciously loud thump (making it seem heavy), yet she carries the bag with ease (despite the number of objects inside).
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*In the American versions of ''[[Harry Potter and the Order of the Phoenix]]'', the spell used on cars to increase their capacity is identified as the [[Enlarging Spell]], though the spell goes unidentifed in the original British text. ''[[Pottermore]]'', however, clarifies that the spell used on the Weasley's Ford Anglia was the Extension Charm, thus making this embellishment [[Canon|non-canon]].
   
 
==Appearances==
 
==Appearances==
*''[[Harry Potter and the Chamber of Secrets]]'' {{comment|possibly, in the form of [[Arthur Weasley]]'s [[Flying Ford Anglia]]}}
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*''[[Harry Potter and the Chamber of Secrets]]''
*''[[Harry Potter and the Prisoner of Azkaban]]'' {{comment|possibly, in the form of the [[Knight Bus]] and the [[Ministry cars]]}}
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*''[[Harry Potter and the Goblet of Fire]]''
*''[[Harry Potter and the Goblet of Fire]]'' {{comment|possibly, in the form of the tents at [[Quidditch World Cup]]}}
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*''[[Harry Potter and the Goblet of Fire (film)]]''
*''[[Harry Potter and the Goblet of Fire (film)]]'' {{comment|possibly, in the form of the tents at [[Quidditch World Cup]]}}
 
 
*''[[Harry Potter and the Deathly Hallows]]''
 
*''[[Harry Potter and the Deathly Hallows]]''
 
*''[[Harry Potter and the Deathly Hallows: Part 1]]''
 
*''[[Harry Potter and the Deathly Hallows: Part 1]]''
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*''[[Pottermore]]''
   
 
==Notes and references==
 
==Notes and references==
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[[fr:Sortilège d'Extension indétectable]]
 
[[fr:Sortilège d'Extension indétectable]]
 
[[Category:Charms]]
 
[[Category:Charms]]
[[Category:Spells of unknown incantation]]
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[[Category:Concealment]]

Revision as of 22:21, 23 June 2015

Harry: "When you say you've got the Cloak, and clothes... "
Hermione: "Yes, they're here."
Ron: "How the ruddy hell – ?"
Hermione: "Undetectable Extension Charm. Tricky, but I think I've done it okay; anyway, I managed to fit everything we need in here."
Hermione Granger explaining her use of the charm in 1997[src]

The Undetectable Extension Charm, or simply Extension Charms (Capacious extremis[1]) is a charm that extends the internal dimensions of the target object without affecting the external dimensions.

History of use

Undetectable Extension Charms are advanced spells, but are subject to strict Ministry of Magic controle, because of its potential to create breaches of the International Statute of Wizarding Secrecy. There is a law in place (which is strictly enforced) that Extension Charms are not to be cast for private use, but only for the production of objects (such as school trunks and family tents), which have been individually approved for manufacture by the relevant Ministry Department.[1] Hogwarts school trunks, like the majority of wizarding luggage, are issued with these charms.[1]

The Extension Charm can be used on cars. Arthur Weasley used this spell, among others, on his Flying Ford Anglia. It was able to fit all of the Weasleys living at the Burrow at that time, Harry Potter, and all of their luggage comfortably. Molly did not recognise it for what it was, stating "Muggles do know more than we give them credit for, don't they?" Mundungus Fletcher cast this spell on an automobile he stole on Christmas of 1995 to transport the Weasleys and company to St. Mungo's Hospital for Magical Maladies and Injuries. It managed to fit all of the above minus Arthur and Percy, as well as William Weasley, Hermione Granger, Alastor Moody, Remus Lupin, and Mundungus himself.[2]

Hermione Granger used this charm on her small beaded handbag in 1997 so that she was able to pack all the supplies she believed she would need while hunting down Lord Voldemort's Horcruxes with Harry Potter and Ron Weasley. This included books, changes of clothes, money, Harry's Cloak of Invisibility, and healing supplies.[3] Eventually, Hermione also placed the portrait of Phineas Nigellus Black that had previously been in 12 Grimmauld Place in her bag as well[4] to prevent Severus Snape from spying on them.

Possible uses

  • The same or a similar spell was used to make Alastor Moody's trunk larger on the inside.
  • This was possibly used also with the Cast-a-Spell Kit because it holds a training room.

Effect

This sophisticated charm has two main effects: to expand an object's internal space while retaining its external dimensions. The charm also magically disguises itself so that no one but the caster (and those the caster confides about the charm in) can realise that this spell has been cast over the object, even if they are experiencing it.

Etymology

The incantation Capacious extremis comes from a corruption of the English words "capacity" and "spacious", and the Latin extrēmus, meaning "extreme".

Behind the scenes

  • The effects of this spell are similar to the effects of the TARDIS in Doctor Who.
  • The effects of the spell are also very similar to Mary Poppins's carpet bag.
  • This charm appears to have a number of interesting side-effects when cast over an object. For example, when Hermione drops the bag she has cast this charm over in Harry Potter and the Deathly Hallows it makes a suspiciously loud thump (making it seem heavy), yet she carries the bag with ease (despite the number of objects inside).
  • In the American versions of Harry Potter and the Order of the Phoenix, the spell used on cars to increase their capacity is identified as the Enlarging Spell, though the spell goes unidentifed in the original British text. Pottermore, however, clarifies that the spell used on the Weasley's Ford Anglia was the Extension Charm, thus making this embellishment non-canon.

Appearances

Notes and references