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[[quoteright:350:[[Anime/OnePiece https://static.tvtropes.org/pmwiki/pub/images/air_door.png]]]]

Essentially, the ability to open and close doors. [[WhatKindOfLamePowerIsHeartAnyway Ooooh, scary]]. But picture this. The user in question [[SealedEvilInACan seals you inside a]] [[PocketDimension door to another dimension]] [[SealedEvilInACan for centuries,]] [[SummonMagic or perhaps opens a door to the infernal planes and fishes out a few monsters]]. [[HeartIsAnAwesomePower Still think so?]]

Open and Shut is one of the lesser known {{Stock Superpower|sIndex}}, and a [[YinYangBomb type of Yin Yang Magic]].

This power is commonly tied to a CoolKey. Thus, the favored weapon of this user is usually a giant vaguely (or not so vaguely) key-shaped staff. It is favored by exorcists since it is a quick way to deal with fearsome creatures without converting to the religion. [[TacticalDoorUse All you need is to find a handy door to lock all your worst nightmares away behind]]. Just better hope they don't decide to team up to rush the door.

In its most basic form, this is basically a combination of BarrierWarrior and ThinkingUpPortals. That is, you can open/close doors to anywhere (and open ''any'' doors), or send incoming attacks into another place. But this is very much a SemanticSuperpower (in fact, the ability to open doors is currently the quote for the page), so other applications of this power can be made.

Because you can open ''any'' door, there might be some overlap with the various ElementalPowers. Most obviously is [[SpaceMaster Space/Time]] in the form of dimensional travel, but you could conceivably use [[PlayingWithFire fire magic]] by opening a tiny hole into a volcano or something, or [[MakingASplash water]] by opening a hole into the middle of an ocean. If the definition of this power is vague enough, this becomes a SwissArmySuperpower.

Not to be confused with an OpenAndShutCase.

See also ThinkingUpPortals, for a practical usage. Contrast MasterOfUnlocking which is about people with mundane, lock-picking abilities, rather than a superpower.

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!!Examples:

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[[folder:Anime and Manga]]

* ''Manga/CardcaptorSakura'', the title character uses a key as a tool to lock away or unlock spirits. The first episode she unseals them all by accident.
** The Lock Card also has the ability to seal anything.
* ''Manga/{{Doraemon}}'' staple gadget "The Anywhere Door" is just that, a door that takes you to a place of your choosing. You have to be pretty specific about where you're headed, though. (Saying "I wanna go high up", for example, opens a door in midair.)
* ''Manga/NatsumesBookOfFriends'' has a kid who ancestor sealed a bunch of monsters away in a book. He decides to release them.
* [=CP9=] agent Blueno of ''Manga/OnePiece'' got this power from the "Door Door Fruit". He can use it to pass through any wall or obstacle, enter a pocket dimension by making a door ''in the air'' and even use it in combat by [[ItRunsOnNonsensoleum turning someone's face into a revolving door and spinning it.]]
* In ''Manga/HunterXHunter'', Knov has a limited version of this as his power: He can create a door anywhere that will take him to a special room in another dimension of his own creation that cannot be detected or accessed without him acting on it. Consequently, Knov can create doors out of this room to anywhere he wants.
* ''Manga/JoJosBizarreAdventureGoldenWind:'' Bruno Bucciarati's Stand, Sticky Fingers, has an ability similar to this: it lets him attach zippers anywhere he wishes, from inanimate objects, to living people, to even his own body. Among other things, this lets him create portal holes, create holes in floor and walls, non-fatally dissect people (including himself), and, at one point, zipping someone's mouth shut so they won't talk.

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[[folder:Comic Books]]

* The obscure Creator/MarvelComics character Ariel had the power to open any door and make it connect to any other door. She claimed that anyone could do this "if they know hyperspacial geometry and have the right kind of hands."

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[[folder:Films -- Live-Action]]

* In ''Film/TheMatrix'', The Keymaker is a program able to [[SkeletonKey access the key to anything]], from locks to motorbike ignition switches.
* ''Film/TheAdjustmentBureau'': The men of the Adjustment Bureau have the power to open any door to any other door, allowing them to close in on any target rather swiftly. This ability is not innate to them but provided by their 1950s-style hats; one of them temporarily gives his hat to the hero so he can beat them at their own game.

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[[folder:Literature]]

* Abhorsen in the ''Literature/OldKingdom'' series can open gates to and between the nine levels of [[TheUnderworld Death]], and can also bind away spirits or undead using [[MagicMusic bells]]. In fact, their magical alphabet itself is constructed as a result of a major seal.
* In ''Literature/LabyrinthsOfEcho'', Numminorikh Kuta learned the art of finding and opening any kind of doors from his mother, who was the Master of Doorways for an ancient MagicalSociety. Also, Max can use doors of any kind to access the [[TheMultiverse Corridor Between Worlds]], and [[spoiler:suffers major PowerIncontinence in the final tome]].
* "The Lost Gate" of the ''[[Literature/MitherMagesSeries Mither Mage]]'' series by Orson Scott Card has the main character seemingly having no power. He later turns out to be a Gatekeeper.
* In ''Literature/MondayBeginsOnSaturday'', a pair of Maxwell's demons work in the ExtranormalInstitute as the doorkeepers.
* In ''Literature/{{Neverwhere}}'', [[MeaningfulName Door]] is a member of the family [[MeaningfulName Portico]], who all have this ability, and are highly regarded because of it. They live in a series of rooms that aren't physically accessible by ordinary means. The ability -- now that [[LastOfHisKind the rest of her family is dead]] -- makes her a MacGuffinSuperPerson for the plot.
** Taken a step further, Door can open ''anything'', and it doesn't need a door, lock, or opening. In her EstablishingCharacterMoment, she [[MookHorrorShow opens up a]] {{mook}}s ''[[LudicrousGibs ribcage]]''.
* The ''Alohomora'' spell in ''Literature/HarryPotter'' (and its locking counterpart, ''Colloportus''), although (understandably, in a world where a bright first-year student can unlock any ordinary door) there are magical locks which are [[NoSell able to resist it.]] ''Film/FantasticBeastsAndWhereToFindThem'' features one, [[MugglesDoItBetter but Jacob simply kicks it]].
* Evan Matthieu, in ''Literature/{{Pact}}'', is the [[UndeadChild ghost of a child]] who becomes a wizard's {{Familiar}}, in the process gaining several powerful abilities from other ghosts in his vicinity. Since this vicinity was a police station, these abilities include a FiveFingerDiscount and the ability to open doors by touching them.
* One of the main uses of ''Literature/TheSubtleKnife'', which can cut through anything, including the walls between worlds.
* ''Literature/VainqueurTheDragon'': Victor's [Skeleton Key] perk can open any lock and causes him to be counted as "invited" for the purpose of any magically protected location. [[spoiler:It turns out to be capable of inadvertently defeating contraception.]]

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[[folder:Live Action TV]]

* Multiple villains on ''Series/{{Angel}}'' have been able to open interdimensional portals. Sahjahn was able to open a door to any dimension. Fred's professor in ''Supersymmetry'' was a magic user with a penchant for exiling students who threatened to surpass him to other worlds. Illyria was also shown to be capable of opening interdimensional portals [[spoiler: before Wesley de-powered her]].
* ''Series/KamenRiderDrive'': One of the MonstersOfTheWeek is the Open Roidmude, which has the power to telekinetically open things like doors, boxes, and the like. It ends up getting on Drive's nerves quite a bit, since it can shut down his Door Gun[[note]][[ExactlyWhatItSaysOnTheTin It's shaped like a car door]], and [[UnorthodoxReload needs to be manually opened and shut to reload]]; by opening the "door", it effectively jams the gun[[/note]] and Justice Hunter powers[[note]]Which lets Drive create a cage around his enemies, obviously not very useful against an opponent who can just open the cage[[/note]].

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[[folder:Religion and Mythology]]

* In the Literature/BookOfRevelation from ''Literature/TheBible'', Jesus declares to the church of Philadelphia that He is the One who holds "the key of David" (a reference to [[Literature/BookOfIsaiah Isaiah 22:22]]), that He can open doors that no man can shut, and shut doors that no man can open.
* The Great Grimoire of Honorius makes special mention of the demon Surgat as "he who opens all locks", and is the only demon the Pope in question could not shake. This coming from a guy who intentionally summoned demons ''explicitly to banish them back to hell'' as a workout for facing {{Satan}}.

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[[folder:Tabletop Games]]

* ''TabletopGame/DungeonsAndDragons'' has the gate spell. Sure, you can head to other dimensions. Or you can summon creatures from them (including elementals, enabling fire effects). Or you can suck/push creatures into other dimensions. Or you can block incoming spells. Or you can create two portals in close proximity, and mimic spell-turning (later versions likely patched this detail).
** On a much less impressive scale, the Knock and Hold Portal spells do ExactlyWhatItSaysOnTheTin.
* The Lore of Portals of the House of Neberu in ''TabletopGame/DemonTheFallen'' is a set of magical/divine abilities revolving around opening and closing doors of any kind.

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[[folder:Video Games]]

* ''VideoGame/{{Barony}}'' has the Open and Lock spells, [[ExactlyWhatItSaysOnTheTin which do exactly what you would expect from the names]].
* ''VideoGame/CultistSimulator'' has the [[BizarroElements principle]] of Knock, which opens things. It's a necessary part of any SummoningRitual, but its more mundane uses fall under this trope. As a result, Knock-aligned cultists make skilled burglars and Knock lore is very useful for navigating the doors of [[EldritchLocation the Mansus]].
* Obviously, the stock power of the Keyblades in ''Franchise/KingdomHearts'' series. Both are used to great effect over the course of the series.
* ''{{VideoGame/Touhou}}'': Yukari Yakumo's ill-defined but tremendously game-breaking power is over boundaries, which she can open and close at will. Usually this manifests as elongated ''VideoGame/{{Portal}}''-style openings in reality (called gaps), but she can also manipulate conceptual boundaries, like the border of Gensokyo or the boundary between life and death.
* The world of ''VideoGame/FireEmblemHeroes'' centers around a war between two kingdoms with this power divided among them; the Kingdom of Askr has the power to open portals to other worlds, while the Kingdom of Embla has the power to close portals to other worlds.

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[[folder: Webcomics]]

* Doorman from ''Webcomic/{{Paranatural}}'' is a Spirit with a doorknob for a face and a door in his chest; insert a key into the keyhole on the knob and the door will open into the room said key unlocks, wherever it is. [[spoiler: It's even powerful enough to allow someone to bypass the barrier around Mayview.]]

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[[folder:Western Animation]]

* Will from ''WesternAnimation/{{WITCH}}'' can not only call up dimensional portals, but she has the ability the sync up the rest of the team's powers to allow their transformation.

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[[folder:Real Life]]

* [[http://en.wikipedia.org/wiki/Maxwells_demon Maxwell's demon]] (in thermodynamics) is a hypothetical entity whose only powers is to open and close doors.
* [[http://en.wikipedia.org/wiki/Nuclear_fission Fission]] and [[http://en.wikipedia.org/wiki/Nuclear_fusion Fusion]] operate off the process of joining or splitting bonds, so yes, this can be [[HeartIsAnAwesomePower very powerful]].

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