A RuleOfCool weapon. Generally magical, [[AppliedPhlebotinum but can be explained with]] [[{{Nanomachines}} nano-science]] instead. Basically, it {{shapeshift|ing}}s into whatever form is most suited for the situation. It might be magically guided by telepathy, or even [[SentientWeapon have a mind of its own]]! Whatever the case, it tends to be significantly more {{Badass}} than any boring old stays-the-same-all-the-time weapon.

A subtrope of SwissArmyWeapon.

A SisterTrope to ShapeshifterWeapon (the character's own body is a form-changing implement of destruction), RetractableWeapon, AdaptiveArmor.
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!!Examples

[[foldercontrol]]

[[folder:Anime & Manga]]
* ''Anime/NeonGenesisEvangelion'': The Lance of Longinus.
* The zanpakuto in ''Manga/{{Bleach}}''.
* The Kakugane in ''BusouRenkin''.
* Green April from ''TowerOfGod'', a hook-like baton that can grow immensely and also splits into several sub-branches.
** A baton!! What an understatement. The Green April is a ultra long whip that expands when ignited into a giant long whip.
* In ''Anime/PantyAndStockingWithGarterbelt'', Panty and Stocking's namesakes work as these.
* Every device in ''MagicalGirlLyricalNanoha'' has at least three forms, sometimes changing its weapon class. As a bonus, one of these forms is always its user's own TransformationTrinket, so there's no need to invest in more items.
* Musica in ''RaveMaster'' wears around his neck a silver skull which, due to his particular brand of abilities, he can manipulate and change into any form he wishes, most commonly a spear.
** The protagonist, Haru Glory, also possesses a sword that has ten different forms, including a simple iron blade, a weapon that explodes on contact, or one that can cut through smoke, magic and other non-cuttables. Two {{Big Bad}}s possess EvilTwin versions of Haru's sword.
** Also in Hiro Mashima's next work, ''Manga/FairyTail'', Knightwalker wields the Ten Commandments in spear form.
* ''RosarioToVampire'' features Moka's younger sister, Kokoa. She can command the CombatCommentator bat to turn into a mace, a mallet, and... well, a bat.
* Vash and Knives' handguns turning into the insanely powerful Angel Arms in ''{{Trigun}}''.
* The Aqua Ribbon in ''YesPrecure5'', which only really takes the form of a ''ribbon'' in the merchandise.
* As the narrator explains, the Carrot Weapon that Mina uses in ''GetsumenToHeikiMina'' responds to her thoughts. As such, it can be whatever the heck kind of weapon it wants to be -- and it has been quite a lot.
* Black Star's weapon [[EquippableAlly Tsubaki]] in ''SoulEater'' has multiple forms: really big shuriken, kusari-gama, smoke-bomb, ninja blade, and, later, [[spoiler:Demon Blade (and the several variations this mode allows)]]. She, and the other Weapons, also counts as {{Equippable All|y}}ies and [[ShapeshifterWeapon Shapeshifter]] weapon.
* Ed's arm in ''Manga/FullmetalAlchemist'' is effectively one of these, not due to any facet of its construction, but because Ed constantly uses his alchemy to change it into various weapons, most commonly a simple blade, though he has been seen changing it into more advanced forms, such as a BFG, or even altering its chemical composition to make it more effective against certain enemies.
* ''MahouSenseiNegima''
** [[spoiler:Negi and Albireo's book weapons. In Negi's case, he chooses an applicable name from his class register to use the pactio of. In Al's case, he uses a special book mark [[RummageFail thanks to the sheer size of his library of names]]]].
** Jack Rakan has [[spoiler:the artifact "Hero with a Thousand Faces", which can assume the form of any sword, "sword" being defined as "thing that Jack wants to hit you with".]]
* In ''YuYuHakusho'', we have the Toguro Brothers. The Elder Toguro can shapeshift into any weapon the younger, muscular Toguro wants to wield; sword, shield, you name it. When the Elder fights alone, he's a ShapeshifterWeapon.
* The "Ultimate Weapon" is the main MacGuffin during an early story arc of ''Manga/SpaceAdventureCobra''. When finally discovered, it looks rather inconspicuous: an ovoid fitting in the palm... from which an eye open. But then, if this eye catches sight of any weapon, it can turn into a copy of it... whether a sword, a gun or ''a tank''. And the Weapon can also turn its wielder into a freaking ''giant'' along with its own scaling up. When confronted with this, Cobra takes great care of avoiding that the Weapon could become a ''spaceship''...
* Subverted in ''HunterXHunter'', where [[spoiler:Kaito]]'s weapon Crazy Slot, upon activation, turns into one of nine very different forms... at random.
* FlameOfRecca: Kaoru's madōgu is a "puzzle weapon" and can be assembled five different ways; given how the weapon looks after the changes, how exactly this happens is unknown, as one form is basically a lance and another involve a long chain.
* In ''{{Naruto}}'', one of the Seven Swords of the Mist has the ability to change its shape.
[[/folder]]

[[folder:Comics -- Books]]
* Defunct comic ''Operation: Strikeback!'''s main character Rascal had a red and white striped scarf that morphed into whatever Rascal wanted or needed at any given moment. From a frying pan to a ''chainsaw''. Yes, a chainsaw.
* The Tactigon in ''[[Comicbook/AvengersTheInitiative Avengers: The Initiative]]''
* In ''ComicBook/{{Annihilation}} Conquest'', Wraith's polymorphic weapon took on a variety of forms, including a gun, a whip, and a small blade, and could somehow deactivate/disarm other weaponry.
* The artifacts from the Top Cow universe (The Comicbook/{{Witchblade}}, ComicBook/TheDarkness, and The Angelus) act as both [[AdaptiveArmor morphable armor]] and weapons.
* DeathsHead II's right-arm implant.
* DCComics: During the Druspa Tau story arc of ''Hawk & Dove'' (1990), tridic metal that let the wielder transform it into any desired weapon, using either NameMagic or a laboriously detailed knowledge of the weapon.
* Paperinik and Morgoth in PaperinikNewAdventures each have such a weapon.
[[/folder]]

[[folder:Fan Works]]
* In ''Fanfic/KyonBigDamnHero'' one of the slider's enemies is equipped with two of those. Later, Kyon and [[WildCard Fujiwara]] take hold of them.
[[/folder]]

[[folder:Films -- Live-Action]]
* ''[[Film/{{Hellboy}} Hellboy: The Golden Army]]'': Prince Nuada has a spear that can change into a dagger and vice versa.
* The Cutlass from ''Film/AfterEarth'' ; its unique design extends it's sharp bladed ends in a variety of shapes which can be chosen by the holder, each blade shape seemingly fitting a different style of attack.
[[/folder]]

[[folder:Literature]]
* ''Literature/KnownSpace'': The ur-example may be the eponymous object from Creator/LarryNiven's short story "[[Literature/KnownSpace The Soft Weapon]]", which was later shoehorned into the ''Star Trek'' 'verse for an episode of ''WesternAnimation/StarTrekTheAnimatedSeries''.
* Iridea's Tear in ''[[ForgottenRealms The Threat from the Sea]]''. But it's an artifact so ancient that even legends about it are mostly forgotten, a {{Clingy MacGuffin}}, it does not accepts just everyone ''and'' requires proper rite for complete binding to its new owner.
* The Great Weapon Godslayer in ''{{Dragaera}}''. However, while she's sentient, there doesn't seem to be much logic behind the forms she uses, much to the annoyance of her wielder.
* One of the ''SectorGeneral'' novels has a [[GeniusLoci living continent]] whose only manipulative tools are silvery symbiotic organisms of organic metal, which [[EmpathicWeapon respond to thought]] to reshape themselves. At close range, other sapient beings can override the vast but diffuse mental control of the landcreature.
* The Platinum Flute in the ''Literature/ApprenticeAdept'' series can become any weapon or musical instrument.
* The Sartan dagger in ''Literature/TheDeathGateCycle'' not only turns itself into a weapon powerful enough to face whatever its wielder's enemies are carrying, it also changes the wielder himself if he can't handle the dagger's new form.
** For example: an elf wielding the dagger had to face another elf with a broadsword. The dagger changed into an even bigger broadsword, which was so heavy the elf couldn't hold it -- so the dagger gave the elf two new arms. (This is when the elf died of shock, by the way.)
** Sometimes, if the wielder is facing an opponent more powerful than the dagger, it will actually ''summon'' something capable of defeating the opponent, rather than turning into it. As a result, a protagonist finding himself threatened by a bunch of KnightTemplar demigods accidentally used it to summon a swarm of [[OmnicidalManiac omnicidal]] undead, which didn't improve the situation any....
* Dom Sabalos of ''Literature/TheDarkSideOfTheSun'' has a "memory sword", which is essentially a hilt containing a device which can produce different types of blades, laser and molecular stripper energy weapons, or even a projectile gun that freezes bullets out of atmospheric moisture.
* The Mesmerist shiftblades in ''The DeepgateCodex'' are souls of the dead conditioned to serve as morph weapons.
* ''TheDarkAngelTrilogy'' has Curoch, which can be made to change into whatever form best suits it.
* The [[ScaryDogmaticAliens Yuuzhan Vong]] amphistaff from the ''Literature/NewJediOrder'' has a comparatively mild version of this power. It can change its length, thickness, and density according to the will of its wielder, meaning that it can quickly shift from whip to spear to staff to sword and back again - and in any of its rigid states, it's durable enough to block a ''lightsaber''. [[LivingWeapon Oh, and its also a living snake-like creature]], meaning that on one end (the "hilt" of its sword form) is a head with venomous fangs that can bite or spit poison, too.
* In ''Literature/WordsOfRadiance'' (second book of ''Literature/TheStormlightArchive''), we find out that a true [[AbsurdlySharpBlade Shardblade]], being wielded by its bonded Radiant, can morph into whatever shape its wielder desires, including non-bladed weapons like hammers and shields. [[spoiler:This is because the Blades are actually [[NatureSpirit spren]]. The ones everyone else is using are dead, but the ones the Radiants use are alive]].

[[/folder]]

[[folder:Live-Action TV]]
* ''Series/KamenRiderKuuga'''s [[MultiformBalance alternate forms]] can change random objects into their [[WeaponOfChoice Weapons of Choice]], with the caveat that they have to resemble the weapon in question; Dragon Form's staff and Titan Form's sword can come from any stick-like object[[note]]though for the Titan Sword he usually uses the baton stored as his CoolBike's handlebar[[/note]], but Pegasus Form's bowgun requires some form of gun.
* ''Series/KamenRiderDenO'''s [=DenGasher=] is made up of four separate parts which can be combined in various ways to become a myriad of weapons including a sword, spear, ax, gun, boomerang and hand-ax, and naginata. Movie Rider [[TimePolice G Den-O]]'s [=DenGasher=] can become a handgun and a ''jutte''.
** Definitely goes with AdaptiveArmor; Den-O's forms are made from the same armor pieces rearranging, just as the weapon rearranges.
** EvilTwin Nega Den-O has the same changing weapon as the regular Den-O, but no form-changing.
[[/folder]]

[[folder:Tabletop Games]]
* ''DungeonsAndDragons''
** Morphing is a magical ability that can be put on a weapon, allowing you to change the weapon within its size category (Light, One-Handed, or Two-Handed). However, since attack range and actual weapon properties stop becoming issues by the time you can have a +3 sword (+1 enhancement, +2 morphing), it is one of, if not the most, useless abilities in the game.
** Also available is the Rod of Surprises, which can change into one of several weapons, each being close to the concept of "decent-sized stick with a blade on one end". It has a few other functions, but those are the main ones. A DM may also allow a player to apply the Morphing enchantment as well. Since the Rod can change into at least one weapon from all three categories, the rod can now become, with a little prep time, ''any melee weapon ever published''. Of course, all the good ones require special training, but that can be solved by taking a level in Warblade, which actually has InstantExpert as a class feature.
** Which was, of course, predated by the Rod of Lordly Might, introduced in 1E, where buttons on the rod allowed the wielder to turn it into a mace, sword, battle axe, or a spear of length between 6-15 feet. Then, there was the Rod of [[JokeWeapon Lordly Might or Might Not]] from ''Magazine/{{Dragon}}'' magazine which included the weapon form of [[ShoutOut +3 backscratcher]].
** There's also the Soulknife Class, a psychic character who weilds blades of psionic energy. They begin with a short sword and later can throw it, and around 5th level they can start changing what the blade looks like, from a short sword, to a greatsword, to a bastard sword, to two short swords. With feats they can turn their mindblade into other weapons as well.
** You can also get the Sizing quality, which allows you to change the weapon's size category. Between this and Morphing, a single weapon effectively becomes ''every weapon ever''.
** Another ''D&D'' reference, karach is an element found in Limbo which can be shaped by the strong-willed, and is used by the githzerai, who inhabit the plane (see the ''Planescape Torment'' entry below).
* The Lunar Exalted of ''{{Exalted}}'' have Moonsilver, which changes and flows constantly. One of the higher level abilities usable with moonsilver weapons is the ability to have a piece break off and burrow to the target's brain. There are also Charms that allow a Lunar to reshape a moonsilver weapon into any other moonsilver weapon they need, be it an axe, sword, or bow.
[[/folder]]

[[folder:Toys]]
* From ''{{BIONICLE}}'': the Toa Nuva's new Adaptive Armor and corresponding weapons automatically shape-shift to fit the environment and/or the foes they are facing. Upon teleporting into Karda Nui and finding themselves in midair, the Toa saw that their armor had already grown wings and jets; while the weapons became light-shooting "Skyblasters", perfect for battling the shadowy, bat-like Makuta that had invaded the area. It's worth noting that this is a MerchandiseDriven example; by giving the Toa shapeshifting armor, LEGO would've theoretically been able to create new figures without worrying about them looking different... if ''BIONICLE'' hadn't been canned two years later and that wave had pretty much been the last appearances of the characters.
[[/folder]]

[[folder:Video Games]]
* ''VideoGame/DevilMayCry'' has a number of these. In the first one, the Sparda weapon (the ultimate form of the humble Force Edge) worked like this, changing from a sword, to a spear, to a sickle, depending on your moves. In the third game, the electric guitar would also morph into a sickle when swung. And in the fourth, of course, is the most ridiculous example of them all: Pandora's Box, which is a rare projectile weapon version of this - turning into a bowgun, missile-launcher, minigun, laser, buzzsaw, or even a ''[[MacrossMissileMassacre flying missile platform]]''!
** In fact, the description of Pandora's Box claims it can take on 666 different forms, although significantly fewer are actually usable in gameplay...
** Of course, being Pandora's box the last form, 666, is Dante simply letting it drop open. If the chaos gauge is filled up this does absolutely insane damage, [[YouCannotGraspTheTrueForm for logical reasons]].
* In ''EternalFighterZero'', Sayuri Kurata's MagicalGirl wand is capable of transforming into a sword, a gun, a mace, and even a piledriver.
* The ''Franchise/FinalFantasy'' series has numerous examples of these.
** The Atma Weapon (a {{Woolseyism}} of Ultimate Weapon) is a mild variation of this in ''VideoGame/FinalFantasyVI''. It's always a pink lightsaber-looking sword, but it changes size (from a knife to the longest sword in the game) and attack power depending on the wielder's HP total.
** ''VideoGame/FinalFantasyXIII'' is filled with this. Lightning's gunblade, which is either a gun or a sword, but not both at the same time like [[FinalFantasyVIII Squall's]]. Sazh's matched pair of pistols can be combined together into a sniper rifle of sorts for some attack animations.
*** Mog from the sequel, ''VideoGame/FinalFantasyXIII2'' can change between a bow and his moogle form. Then on top of that, while in weapon form, the bow can be closed to form into a sword, in a mechanical method similar to many of the weapons from Final Fantasy XIII.
*** And on top of that, we have Noel's dual swords. Aside from working as two swords (and having a built in sheath for the smaller sword on the larger flame shaped sword), they can also be combined together to form a spear/glaive, and that then can morph slightly more into a javelin form.
** ''FinalFantasyXIV'': A large number of the Item Level 70+ gear count as these. Of particular note, is the Artemis Bow, the bard job's relic weapon. While not in combat it looks like a harp. But as soon as it's drawn, it opens up into a full sized longbow.
* ''VideoGame/ProjectSnowblind'' has a variety of weapons, all of which have secondary fire modes that allow them to fill a role that is completely different from their primary role. Examples include a sniper rifle that doubles as a {{Mind Control}} gun, the silenced pistol that can fire smart missiles, and the ricocheting flechette gun, which could unleash a swarm of taser drones. One might say that instead of morph weapons, Project Snowblind has morph ammo.
* ''NeverwinterNights''
** Dream Dagger in ''NeverwinterNights2: Mask of the Betrayer''.
** Enserric the Longsword from ''NeverwinterNights: Hordes of the Underdark'' is a limited version. The weapon can morph itself into few other forms, but after pulling it from its former wielder's fingers, it's stuck in that form.
* ''VideoGame/PlanescapeTorment''
** Dak'kon's karach blade is shaped by his thoughts; based on your conversations with him, it changes form. [[spoiler:The Practical Incarnation reveals that he went through all the trouble of obtaining Dak'kon for the sake of his blade -- apparently, only the sky's the limit for how powerful that weapon can become, if Dak'kon is focused enough.]]
** And there's the [[InfinityPlusOneSword Entropic Blade]], which can be changed into whatever weapon the PC is most skilled with.
* ''SoulSeries''
** Necrid in ''Soul Calibur II'' has a glowing ball of PureEnergy that can become a daisho, zweihander, or battleaxe. He can also do a whip sword or simply expand the ball and smack you with it.
** The eponymous swords Soul Calibur and Soul Edge can also change form to fit their wielder. Soul Edge was originally a pair of longswords and Soul Calibur was originally a Chinese jian [[AncestralWeapon passed down]] from [[ChineseGirl Xianghua's]] mother to her. However, Both swords' most iconic forms are [[OneHandedZweihander Zweihanders]]. In most of the games, every playable character has an unlockable weapon that is either Soul Edge or Soul Calibur, morphed into [[WeaponOfChoice whatever weapon that character uses in their personal fighting style]].
* ''WorldOfWarcraft''
** Certain Epic quality weapons (before the expansion pack) used to be Morph Weapons (Benediction-Anathema is a good example). This mechanic is no longer used, however, due to problems with enchanting such items.
** Another system was introduced instead, the heirloom items. These items can be passed between any character on the same account and server and scale with the characters level. Some of them even change armor type to cover the fact that several classes get a new armor type to use at level 40 (leather->mail and mail->plate).
** There's also (with the second expansion) Quel'Delar. Okay, it's always a sword, but in game terms what's far more important is that when it is finally gained after a long quest chain, it "adapts to its wielder" and you can choose what stats it has, which matters more than the actual physical shape it takes. (If you can't use a sword at all, you'll get a different weapon of equal power that I guess they just had lying around.)
* The Komato [=GEN2=] Pre-Loader uses nanotech to assemble its ammo on the fly, allowing its wielder to open fire with anything -- from machineguns to death beams to the MPFB Devastator -- with absolutely no warning beforehand. The same can be said of the Tasen replica wielded by VideoGame/{{Iji}} herself.
* ''Franchise/KingdomHearts''
** Keyblades do this in two different ways - first, swapping keychains around gives it a new "look" based on a certain world or character, with different bonuses in terms of strength / reach / magic. When the ''Birth by Sleep'' characters showed up, things started getting crazier.
** [[BonusBoss Lingering Will's]] Keyblade changes from a {{BFS}}, to a whip, to a bow and arrow, to a [[{{BFG}} giant cannon]], to a HOVERCYCLE! [[http://www.khwiki.net/images/5/50/Lingering_Will_Fighting_Styles_KHIIFM.png Seriously.]] Terra, by contrast, can only use the cannon and cycle modes as a playable character.
** Keyblades in general can do this, although only the ''Birth By Sleep'' characters know how to make use of it so far. Each Keyblade seems to have their own specific extra shapes based one or two specific keychains - Terra's bike / cannon / etc are all based around either Eartshaker or Ends of the Earth, whether or not you're actually using them in battle.
** Now in the [[UpdatedRerelease Final Mix version]] of ''Birth by Sleep'', the new bonus boss [[spoiler:No Heart, the data of Master Xehanort in his prime,]] can change his Keyblade into shin guards, a large claw, an arm cannon, a floating shield and even a large pair of wings.
** One of the new Kingdom Hearts 3 gameplay footages released has Sora turning his Keyblade into two energy guns to attack enemies.
* ''{{Jak and Daxter}}'': Jak's Morph Gun. Really, [[ExactlyWhatItSaysOnTheTin the name says it all]].
* Zero's Z-Saber in ''VideoGame/MegaManZero'' can also be a spear, grappling hook, tonfa, [[BottomlessMagazines magazine]] for a pistol, or shield you can throw.
** In ''VideoGame/MegaManZX'' and its sequel however, the ZX biometal (which is based primarily on the VideoGame/MegaManZero era Zero) has a single weapon: the handle of the Z-Saber can tilt 75 degrees, turning it into a chargeable buster pistol (this is only really apparent in cut-scenes, however).
* While the weapon itself doesn't change, VideoGame/MegaMan's Arm Cannon can fire a variety of different weapons thanks to the weaponization of his Variable Tools System. In the sequel series, ''VideoGame/MegaManX'', X's X-Buster does much the same, but, when he gets the inevitable X-Buster upgrade, he can also charge the weapons to get entirely different effects (such as Chameleon Sting, which is stated to fire powerful optic lasers, making him functionally invincible when it's charged up).
* ''ManaKhemiaAlchemistsOfAlRevis''
** The main character, Vayne, has ''[[EquippableAlly his cat]]'' transform into a sword and armor. And then it further transforms into an [[{{BFS}} even larger sword]], among other things...
** And in the sequel, ''ManaKhemia2FallOfAlchemy'', both of the main characters transform their weapons during their Intimate Strikes. Raze transforms his [[EnergyWeapon sword of light]] into a spear, and Ulrika transforms her morning star into a spiked hammer.
* Jude's [=ARM=] in ''VideoGame/WildARMs4'', "Shapeshifter", typically takes the form of a one-handed pistol, but can also transform into a sword or a two-handed beam cannon, among other things.
* For once Creator/PeterMolyneux wasn't lying when he said weapons in ''VideoGame/FableIII'' will alter their shape depending on what you slay with it. Whether there was any actual point to this system however...
* Your SilentProtagonist in ''GodsEaterBurst'' wields a weapon which shifts between a BFS and BFG at [[RealTimeWeaponChange the push of a button]].
* From the GuiltyGear series there's Millia Rage and her ''hair''. Technically, her hair is alive (long story) and she can use it as a weapon by changing its shape and density at will. Millia can turn it into a blade or shield herself with it, and can shoot a projectile from it, among many other things. Her ultimate kill move has her hair locks impale the opponent. ''Twice''.
* Technically, the Noble Phantasm of [[spoiler:Lu Bu]], Rani's Berserker in ''[[FateExtra Fate/EXTRA]]'' is one of these. The NP can switch between five different forms, however, because Berserker is under Mad Enchantment, he doesn't have enough frame of mind to use it to its full potential. The only forms he can use in the game are a pike and a bow that launches said pike as the arrow. The other three forms are a mystery.
* The Scions in ''[[Videogame/BattleZone1998 BattleZone II]]'' have shapeshifting {{Hover Tank}}s. Combat mode is faster, more maneuverable and regenerates ammo, while Assault mode is more damage-resistance and [[RegeneratingHealth regenerates health]] (slowly). The weapons on the tanks likewise shift between Combat and Assault mode; Combat is best suited for fighting other ships, while Assault mode is better at attacking bases or high-end units. The Scion's Arc Cannon for example, goes from firing a long-ranged [[LightningGun 5-shot lightning burst]] in combat mode to a continuous short-ranged lightning arc in Assault mode. International Space Defense Force weapons also have combat/assault modes, but their units are incapable of morphing, forcing them to rely on other units to get the alternate modes.
* ''VideoGame/LeagueOfLegends'': [[LightningBruiser Jayce]]'s WeaponOfChoice is the [[DropTheHammer Mercury Hammer]]/[[EnergyWeapon Mercury Cannon]]. Changing the form of the weapon also changes Jayce's whole move set, giving him the ability to transform from CloseRangeCombatant to LongRangeFighter at will.
* Bound weapons in ''Franchise/TheElderScrolls'' series becomes this to the player. Players with a high enough conjuration skill are never without a weapon (or minion!)
* Later entries of the ''VideoGame/MonsterHunter'' series have the Switch Axe weapon class, a "high-tech" armament that can transform using a special phial from a [[AnAxeToGrind massive axe]] into a [[{{BFS}} massive sword.]] Also, the upcoming Monster Hunter 4 has another transforming weapon class, the Charge Axe, which adds a separated sword-and-shield form to the mix.
* VideoGame/{{Vanquish}}'s Battlefield Logic [=ADaptable=] Electronic weapons system(BLADE) not only transforms into up to three different weapons on command, it can [[http://www.youtube.com/watch?v=89pX2JRsWvI#t=03m34s store itself in Sam's arm]]. How does it work? [[RuleOfCool Who cares?]]
* In "Shounen Kininden Tsumuji" a Japanese game, has Tsumuji's weapon a large shuriken is able to transform into different weapons against enemies after gaining power stones.
[[/folder]]

[[folder:Web Animation]]
* In the Feast Master story arc of ''BananaNanaNinja'', the Omni-Functional Kitchen Gadget can turn into a variety of cooking utensils and appliances, as well as a HumongousMecha used in the final battle.
[[/folder]]

[[folder:Web Comics]]
* In ''{{Darken}}'', there's Shard, a sentient, evil sword, who can change himself into whatever form of weapon is most advantageous. Although he's more likely to change into whatever's funny...
* Dies-Horribly's metal arm in ''{{Goblins}}''. It's also an EmpathicWeapon with PowerIncontinence for a triple-threat.
** Downplayed by the Axe of Prissan; it was intended to be used by multiple individuals and so can alter its size to suit the needs of whoever wields it, but its basic form will always be an axe.
* Secret's weapon in ''KeychainOfCreation'' is one of these, as well as an EmpathicWeapon with a taste for blood -- including the ''wielder's''. Yikes.
* The title character's sceptre in ''GorgeousPrincessCreamyBeamy''. It's ''supposed'' to be only able to morph into various eating utensils, but she managed to get around this with her warped logic; "A sawblade could be an eating utensil!"
* Beisaru's staff, in ''{{Juathuur}}'', can get longer. And sharper.
* Fiona's weapon in ''SupernormalStep'' manifests a variety of shapes out of its apparently-fixed handle. So far she doesn't seem to have much control over its shifting.
* In ''WebComic/AxeCop'', Fire Slicer has a sword that can turn into a torch and then back into a sword, so he can set his opponents on fire while he's cutting them in half.
* Wildcard, the sword-of-a-million-tricks from ''[[TalesOfTheQuestor Tales of the Questor]]'', made this trick number 1,000,001, debuting this new ability by [[spoiler: lobotomizing a dragon. ''OUCH.'']]
* ''{{Homestuck}}'': Kanaya, Jane, [[spoiler:Calliope]], and [[spoiler:Caliborn]] all wield weapons which are capable of morphing: Kanaya wields a lipstick which becomes a chainsaw, Jane wields a cutting-edge Betty Crocker spoon which becomes a fork with the flick of a button, [[spoiler:Calliope's wand transforms into a magnum pistol]], and [[spoiler:Caliborn's scepter turns into a rifle]].
** Kanaya's in particular is a callback to ProblemSleuth, where object/weapon duality was a running gag.
--->Your KEY is out of bullets!
* Darius in ''TheCyantianChronicles'' got a somewhat high tech [[http://cyantian.net/blog/2010/06/18/06182010/ "stick"]] for his 15th birthday.
* [[APTComic Ammika's locket.]] It's a sword! It's a flail- [[InsistentTerminology er, mace!]] [[ImprobableWeaponUser It's a cat!]]
[[/folder]]

[[folder:Web Original]]
* The [=HaLOs=] in ''AvatarAdventures''. They make Christianity ''awesome''.
* In ''[[ChaosFighters Chaos Fighters-Route of Peaks]]'', Cogra's pen has a laser blade and it can change into a gun pod and a shield.
* In ''Literature/{{Worm}}'', Miss Militia has this as her superpower. She can manifest any handheld weapon she wants, and never has to reload.
[[/folder]]

[[folder:Western Animation]]
* The Lotus Blade in ''KimPossible''.
* Yang's bamboo sword in ''WesternAnimation/YinYangYo''.
* Featured in one of ''OhYeahCartoons'' more cinematic shorts.
* ''WesternAnimation/XiaolinShowdown'' does one of these with Omi's Shimo Staff.
* There is a transforming sword in the old ''[[WesternAnimation/TeenageMutantNinjaTurtles1987 Teenage Mutant Ninja Turtles]]'' cartoon. Splinter is the only ninja skilled enough to wield it; otherwise, it sprouts extra blades and such uncontrollably.
* ''WesternAnimation/SheRaPrincessOfPower''
** She-Ra's power sword can change shape when she says the phrase "Sword to ".
** Her friend Bow's... bow can change into a lute whenever he wants to sing a song. This doesn't come up very often, thankfully.
** And let's not forget Hordak, who can [[ShapeshifterWeapon shapeshift his own body into any kind of weapon needed]].
* InspectorGadget's hat could function as one when it deigns working right.
* The ''WesternAnimation/StarTrekTheAnimatedSeries'' episode "The Slaver Weapon" involves Spock, Sulu and Uhura held captive by a crew of Kzinti (did I mention that the episode was written by Larry Niven? Seriously.) while carrying a case of artifacts from a long-lost race called the Slavers. One of the artifacts turns out to be a hand-held weapon that can change form with a twist of a dial, from an energy pistol similar to a phaser, to a telescope, to a vocalizing computer, to a long-range weapon that carries the impact of a small nuclear bomb. Fortunately for the rest of the galaxy, it also have a self-destruct (which the vocalizing computer tricked the Kzinti into triggering). Sulu hypothesized that the device was used for espionage instead of combat, since the average grunt wouldn't need all those settings.
* Guardian Keytools from ''ReBoot'' (Also a GreenLanternRing), such as Bob's Glitch.
* In ''WesternAnimation/BarbieInTheNutcracker'', the Mouse King's sword could transform into any other weapon he wanted, including a [[FridgeLogic crossbow that somehow starts out with ammunition.]]
* ''GaltarAndTheGoldenLance'': the titular weapon is somewhere between this trope and SwissArmyWeapon as it starts off as a [[RetractableWeapon stick that looks like a pair of collapsed pummels]], extends into a [[DoubleWeapon double-sword/lance]], can [[BifurcatedWeapon bifuburcate into a pair of swords, or recombine into a more powerful sword]].
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