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[[caption-width-right:310:[-Wait, [[DeceptivelySimpleDemonstration she hit a cleavage plane]]! That's cheating!-]]]

->''"I can tell you with no ego this is my finest sword. If on your journey, should you encounter God, God will be cut."''
-->-- '''Hattori Hanzo''', ''Film/KillBill''

An absurdly sharp blade is a bladed weapon with AbsurdCuttingPower because it's just ''that damn sharp''. No magic, technology, superpowers, or other type of AppliedPhlebotinum required to slice and dice to your heart's content. Such things may have been involved in the production of the blade, but when in use, its cutting power comes from its pure physical sharpness alone.

Blades like these almost always result in a CleanCut -- in fact, about the only thing they can't cut is [[LikeCannotCutLike a similarly sharp weapon]]. Expect to hear some AudibleSharpness (AudibleGleam optional) whenever one of these blades is in use. Frequently used in SingleStrokeBattle[=s=]. Be very afraid if an Absurdly Sharp Blade is in the hands of a swordsman with ImplausibleFencingPowers; luckily, the InverseLawOfSharpnessAndAccuracy usually ensures that it isn't.

SharpenedToASingleAtom is a subtrope popular in ScienceFiction settings, where the blade is so sharp that the width of the cutting edge can be measured in atoms or molecules. See AbsurdlySharpClaws when the ASB is a NaturalWeapon.



* The SoBadItsGood ads for [[http://www.youtube.com/watch?v=4q7GCuWFsSs Ginsu knives]] try to sell the Ginsu 2000 as an Absurdly Sharp Blade that NeverNeedsSharpening. Though it's a DeceptivelySimpleDemonstration, as cutting through an aluminum can (or whatever absurdly hard object they demonstrate the knife slicing through) is a lot easier than many everyday cooking tasks, such as slicing through a winter squash, clearing beef gristle, or boning a fish fillet.
-->[[{{Series/Seinfeld}} "If you really need a knife that can cut through a shoe, maybe you're not buying the best quality meat."]]
* Banco do Brasil parodied this by [[http://www.youtube.com/watch?v=ckcyGSLvwkI advertising their credit card,]] "which can split anything" (as in, split payments.)
* Chef Tony once advertised the Perfection Series knives as so sharp they can cut a pineapple in half in midair. Also a DeceptivelySimpleDemonstration, since a blade doesn't necessarily ''need'' to be razor sharp to cut through a pineapple if you're using a forceful swing of the knife.

[[folder:Anime & Manga]]
* Several of the swords in ''Manga/OnePiece'' are like this. Dracule Mihawk's Black Sword, for instance, is so sharp that it once cut a wall of ice in half, length-wise. And that was without using Haki, the power in the ''One Piece'' world that lets someone's weapons affect nearly anything.
** Roronoa Zoro had swords like this too, even before the TimeSkip when [[TookALevelInBadass he got infinitely better]]. He learned how to cut through cannonballs and a man made entirely out of swords. This partially has to do with how good Zoro is, and because the three different swords he uses are all at least partially magical.
** A flashback during Zoro's time at his dojo has his sensei explain that inverting this trope is also necessary to playing it straight; Only the very best swordsman can ''choose'' whether or not they want to cut something. He demonstrates this by purposely failing to cut a piece of paper. During Zoro's battle against Mr. 1 in Alabasta, he shows that he's mastered this aspect by running his sword through some palm leaves- and doing no damage.
* The Sword card from ''Manga/CardcaptorSakura''.
* In ''Anime/{{Grenadier}} - The Smiling Senshi'', the hero, a swordsman, has a(n impractically) long katana, sharp enough to slice an incoming artillery shell in half (without triggering the fuse,) and cut a giant boulder clean in half, albeit with assistance from the heroine's pistol (four rounds to the back of the blade at the moment of contact, to propel it into the rock.)
* Goemon, from ''Franchise/LupinIII'', wields a katana called the ''Zantetsuken'' ("Iron-Cutting Sword") in the Anime, and Nagareboshi ("Falling Star") in the Manga. If the sword is unable to cut something, it becomes a plot point.\\
Exactly ''why'' the sword has such incredible cutting power varies, due to BroadStrokes continuity. ''Anime/LupinIIIEpisode0FirstContact'' and ''Anime/LupinIIIDragonOfDoom'' both explain that the Zantetsuken is made out of a mysterious alloy. ''Anime/LupinIIIGreenJacket'' explains that the three famous swords of UsefulNotes/{{Japan}}ese past (Murasame, Masumare, Ken) were reforged into this one sword, and it is their spirit that makes it so powerful. In the manga, it's said to be made of a rare steel alloy produced from [[ThunderboltIron meteoric iron]] that is almost indestructible, though apparently the metal can cut itself.\\
Regardless of why it can cut anything, it's a running gag in all versions of the series that the sword, for all its sharpness, can't cut a yam-based gel named "Devil's Tongue". In addition, he almost never gets to cut a ''person'' with it -- his CatchPhrase, said after he cuts something inanimate (often [[ClothingDamage clothing]]) is "Once again I have cut a worthless object."
* In ''Manga/{{Hellsing}}'':
** Father Alexander Anderson of the Vatican's Iscariot Section XIII fights vampires, ghouls, and Nazis with ridiculously sharp bayonets that he blesses before combat. Not only does he keep a seemingly endless supply of bayonets on his person at all times, he also carries a very long, bayonet-lined, exploding chain that utterly destroys whatever monster he's chosen to hunt that night. According to WordOfGod, Anderson does possess a form of HammerSpace and is actually [[http://en.wikipedia.org/wiki/Four-dimensional_space four-dimensional]].
** Sir Integra Hellsing always carries a sword on her person and doesn't hesitate to use it, the most memorable of which involves slicing clean through a Nazi vampire's head. Even HolyHitman Anderson compliments her on such a swift, bloody kill. Not bad for a [[BadassNormal normal human]].
* AxCrazy Sword Guy from the first episode of ''New Manga/GetterRobo'' has this going on with his katana. Including slicing down the better part of a Shinto Shrine. It works for Ryoma when he disarms him too; he [[BareHandedBladeBlock grabs]] it, redirects into the face of one of his attackers, slashes the sword's owner with it, and then hurls it through the arm of the KnifeNut. There's a pause of about two seconds before his arm goes off and blood starts spewing everywhere. This fight was taken almost frame-for-frame from Creator/KenIshikawa's original ''Getter Robo'' manga, with the major exception that instead of Adult Ryoma, it was the classic version who did it.
* ''Anime/DragonBallZ''
** Yajirobe's katana. Weapons are mostly useless against even weak enemies, but Yajirobe is able to accomplish feats like slicing off Oozaru Vegeta's gigantic tail in a single swing, despite his unimpressive strength (by DBZ standards.)
** Also Krillin's Ki-Enzan ("ki razor," an energy disc called "Destructo Disc" in the dub), an absurdly sharp [[KiManipulation ki attack]]. Though Krillin himself is quickly OvershadowedByAwesome, his signature technique remains deadly, and at one point he is able to cut off Frieza's tail. His relative lack of power is an advantage with this technique: The disc is slow enough that most enemies see it coming and could dodge easily, but instead try to NoSell it, getting themselves cut. He almost takes out [[TheDragon Nappa]] (who was dominating the entire Z-Fighter team minus Goku) during the Saiyan Saga with it... But the much smarter Vegeta recognized the nature of the attack in time to warn Nappa. Frieza also knew to dodge because he independently invented his own version (the Death Saucer, which he can guide telekinetically,) but got caught off guard by one of them and thus lost his tail. Krillin tossed dozens of others at Frieza but failed to get any other hits... And later on Frieza [[HoistByHisOwnPetard accidentally cut himself in half with a Death Saucer]]. Only Cell manages to tank it.
** How Trunks' sword can cut through the augmented Frieza without shattering is never explained, but it is clearly more durable than almost any other weapon shown.
** The Z Sword is a subversion: it's incredibly heavy, and sharp enough to make clean slices through boulders without issue, but when they test the blade against a block of solid ''katchin'' (the hardest metal in the universe, apparently), it breaks in half. [[spoiler:This turns out to be a good thing though, since it frees the Kai that was sealed inside it.]]
* Played with in ''LightNovel/{{Slayers}}'' with the Blast Sword. It was so sharp you couldn't put it in a sheath without cutting it in half. It was so sharp it was useless so they had to find someone to cast some magic on it to dull the blade. But even the dulled blade still fits this trope.
* Parodied in ''Manga/KenichiTheMightiestDisciple'', during a {{yonkoma}}-style {{omake}} (seen in the 2nd anime ending: Shigure sharpens a kitchen knife for Miu, which ends up cutting through the radish, cutting board, and about three feet of counter/cabinet.
** Shigure sliced tonfas, sticks, steel sai and then [[ClothingDamage the enemies' clothes]] with a ''wooden spoon''.
** Played straight with Shigure's Nihontou, which can cut through anything.
* ''Anime/DarkerThanBlack'': If Hei's knives aren't these, then crappy concrete is probably more of a threat to Japan than Hell's Gate and everything that came out of it put together.
* In ''Manga/UntilDeathDoUsPart'', the protagonist's sword is camouflaged inside his white cane. Said sword is able to cut through a gun... And the cut is so clean they actually manage to stick the parts of the gun back together.
* While ''Anime/SamuraiChamploo'' contains more typical examples with swords, the blade on Umanosuke's [[SinisterScythe kusarigama]] really takes the cake, being able to cut clear through rocks and thick wooden support beams without even slowing down. It also makes such an [[AudibleSharpness insanely loud noise]] when swung through the air that you'd think it's regularly breaking the sound barrier. Ultimately, this ends up completely biting him in the ass, as Mugen is able to [[HoistByHisOwnPetard swing the blade back at him]] and even without a huge amount of force behind it [[OffWithHisHead the thing manages to cut his head off]].
* ''Manga/RurouniKenshin'':
** Sagara Sanosuke may have a {{BFS}} but Kenshin's original sword cut through it. He's also used the sharp side of his reverse-blade sword to slice through cannonballs and a huge lamp-post.
** When his original reverse blade sword broke, he went to visit a swordmaker. That man's cutting knives (as in for cooking) were able to slice a turnip in half with a cut so fine that Kenshin was able to fit the two halves back together without showing a seam.
* Mai in ''VisualNovel/{{Kanon}}'' has a sword that's strong enough to slice clean through several metal objects around her and ''crush a brick wall''.
* The Blade of Masane Amaha's ''Anime/{{Witchblade}}'' in the anime, as demonstrated multiple times as it takes machines a while to realize that they have been cut and explode.
* Every katana forged by Luke in ''LightNovel/TheSacredBlacksmith'' seems to be capable of cutting through most things, such as a two handed sword or another katana that was swung at it, meaning it can cut through other swords with no force behind it at all. His magically forged katanas are offset by their fragility, but they still cut through the insanely overpowered demon swords.
* In his first episode on ''VideoGame/FZero: GP Legend'', Samurai Goroh uses his sword to cut through prison bars, a missile flying towards him (while on the back of a moving vehicle,) an armored vehicle, and at the end, an ''entire spaceship''. Truly Goroh's blade is the mightiest force in the universe.
* In ''Manga/{{Toriko}}'', kitchen knives made by the master sharpener Melk can't be bought without a license, to prevent unskilled users from accidentally injuring themselves. This culminates in what could possibly be the best example of this trope, when Melk the 2nd completes Komatsu's new knife. A light swing of it proceeds to make a gigantic gash in the mountain. ''It didn't come in contact with anything''.
* In ''Manga/{{Berserk}}'', Guts receives a sword from the master blacksmith Godo shortly after the Eclipse which proves itself capable of cleanly cutting through the blade of another sword and the tip of an anvil in a single stroke. However, an absurdly sharp sword of merely ordinary size doesn't suit Guts' style, and it [[WreckedWeapon doesn't last a single fight]].
** Subverted with Guts' {{BFS}} that Godo gives him after that. While the Dragonslayer does far better and cleaves through nearly anything, it's really because the blade is insanely heavy and Guts is just that strong. In fact, Godo calls it absurdly ''dull''.
* ''Anime/MacrossFrontier'''s Brera Sterne has a BladeBelowTheShoulder no larger than a small combat knife that ''cuts a Hydra in half''. While the setting ''does'' have AppliedPhlebotinum, such as the Pin Point Barrier knives on the TransformingMecha, but no explanation or even visual/audio cue is ever given for Brera's knife other than it cuts tiger-sized creatures in half.
* In ''Franchise/{{Zoids}}'', blades built into powerful zoids (particularly the Liger series) can cut through damn near anything, including blades used by MechaMooks.
* The swords given to the warriors in the unnamed organization in ''Manga/{{Claymore}}''. This is {{Lampshaded}} at one point when Miria says something along the lines of "Have you ever wondered why our swords never chip or dull, no matter how hard we swing or how hard the surface we hit? What exactly are they made of? The material can't be from this continent and I've looked everywhere." [[spoiler:Priscilla somehow consumed her own sword when she Awakened, and is able to form it again whenever she feels like swordfighting.]]
* The sword Melan wields in ''Anime/BrigadoonMarinAndMelan'' can cut through almost anything on Earth, including bullets and gun barrels. However, it's not always successful against weapons made on Brigadoon.
* If a monster in ''Anime/YuGiOh'' uses a sword, said monster has probably used it like this at least once, creating a CleanCut in the opponent.
* [[ManOfWealthAndTaste Solomon Goldsmith's]] from ''Anime/BloodPlus'' has a BladeBelowTheShoulder capable of cutting through cliffs and the limbs of [[NighInvulnerability Chevaliers]]. This includes the arm of [[spoiler:James]] who sports extremely powerful InstantArmor.
* Micaiah's katana in ''Manga/MagicalGirlLyricalNanohaVivid'', which is mentioned to be a normal physical sword. After she sharpened it for the tournament, she tests its edge by slicing a falling bus into fours.
* The Gerbera Straight used by [[Manga/MobileSuitGundamSEEDAstray Lowe Guele's Gundam Astray Red Frame]]. He had it built because he needed a weapon to defend himself with, beam sabers drained precious energy and a [=GINN=]'s Heavy Sword used inertia, thus precious energy, to cut.
* ''Anime/MobileSuitGundam00'' has the GN swords. They are all quite bulky, but they are absurdly sharp despite not looking like it. Justified in-universe as GN Particles can (apparently) be used to increase a solid blade's sharpness... [[MakesJustAsMuchSenseInContext whatever that means]].
* In ''Manga/{{Gintama}}'', Sakata Gintoki's sword is so sharp it can be used to cut through several feet of metal. It's also made of wood.
* Creed Diskenth's ''ki'' blade in ''Manga/BlackCat'' will slice cleanly through everything short of the {{Orichalcum}} used in Chronos assassins' weapons. When he cuts off Train's hand during their first encounter in the manga, the doctor who re-attaches said hand notes that it's as if the cells were simply pulled apart.
* The mid-'90s anime ''Manga/ChuukaIchiban'' (Cooking Master Boy) has Leon, one of the main characters, in possession of a legendary set of seven cooking knives called the Seven Star Knives. The smallest is the size of a fruit knife while the largest is borderline {{BFS}} to prepare a cow or a bull. They're ''all'' so sharp that one of it was once used to cut open a fish's ovary, extract all the eggs, and then without any surgery, close the wound again due to the extremely clean cut it was made, and the fish is released back to water without so much of a scratch. This is consistent with the wielder's ActualPacifist outlook, despite his FaceOfAThug.
* In ''Manga/TriageX'', [[GagBoobs Yuko]] wields a seemingly ordinary sword that is apparently capable of slicing a ''shipping container'' in half in one stroke.
* In ''Manga/KnightsOfSidonia'', the Kabizashi blades used by the show's HumongousMecha are the only weapons that can truly kill the Gauna.
* In ''Manga/AttackOnTitan'', the soldiers' specialized blades can slice into the giants' [[AttackItsWeakPoint weak spots]] that even cannons have trouble destroying. The [[CripplingOverspecialization trade-off]] is they are so easy to dull and break, each soldier carries twelve of them and can still run out.
* ''Manga/{{Naruto}}'':
** The Sword of Kusanagi which is the blade that Orochimaru uses. Its sharp enough to cut through diamond and even damage Monkey King Enma in his Adamantine Form. The only thing it failed to damage is the Version 2, Four Tailed form that Naruto Uzumaki had.
*** Kakashi's Raiden technique is seen cutting through Version 2 Chakra cloaks like a hot knife through butter. Perhaps it's more of an unstoppable blade than actual blades.
** We also have Sasuke's version. While its no more sharp than an ordinary katana, it becomes nearly unblockable when he charges Chidori through it. With it he can cut through kunai like butter.
** Then we have the blades [[PoweredArmor Susano'o]] uses. [[spoiler: Madara's shown to be sharp enough and strong enough to break through Gaara's sand, as well as in its Perfect Form ''bisect two mountains'' in a single swing.]]
** Finally, there's Naruto's strongest attack next to the Bijudama, the Futon: Rasenshuriken. It can cut through Pain's paths[[note]]normally seen to be nigh-unbreakable[[/note]] with ease, as well as stone, giant mountain-sized trees, and even damage Kurama's fur. The only thing it hasn't damaged is the Sandaime Raikage who is [[NighInvulnerability made of diamond]].
* ''Manga/TheSeveringCrimeEdge'': Kiri's scissors can sever body parts, something ordinary scissors obviously can't do.
* In ''Anime/KillLaKill'', Ryuko's Scissor Blade can cut through Goku Uniforms, which normally make the wearer {{Nigh Invulnerab|ility}}le against anyone not wearing one. Two scissor blades can cut through life threads in such a way they can never repair themselves.
* In ''Manga/{{Bleach}}'' Ouetsu crafted Sayabuse, which he deems a failure. The blade has incredible cutting power and cannot chip due to its impossibly smooth blade. At the same time it would destroy any traditional sheath and must be carried in a backpack filled with a thick jelly.
* In ''Manga/{{InuYasha}}'' the Tetsusaiga is sharp enough to cut through the scar in the wind created when two demons' auras collide, allowing Inuyasha to use his signature Wind Scar technique.
* In ''Anime/FateStayNightUnlimitedBladeWorks'', falling leaves land on Assassin's sword and split on contact.
* In ''Anime/TenchiMuyo'', Tenchi discovers the Master Key and is dismayed that it's just a rusted piece of junk. However, when he accidentally breaks the blade, it ends up splitting a rock in half and later learns the sword is actually a LaserSword.

[[folder:Comic Books]]
* Franchise/WonderWoman has a sword forged by the god Hephaestus that is said to be so sharp it can cut the electrons off of an atom. In the New 52 she even splits an atom with it causing an atomic explosion.
* Zauriel, a guardian angel and former member of the Franchise/JusticeLeagueOfAmerica possessed a divine, FlamingSword so sharp it could cut through dimensional barriers, even the ones separating the living realm from Heaven and Purgatory.
* In the Comicbook/{{Supergirl}} story ''Comicbook/DemonSpawn'', villain Nightflame's magic sword can cut anything, including dimensional barriers.
* Subverted in ''Comicbook/SupermanVsTheAmazingSpiderMan''. Comicbook/LexLuthor crafted a sword that gives off red sunlight. It was not particularly sharp or sturdy, but it could cut ''Franchise/{{Superman}}'' because of the red sun radiance.
* Franchise/{{Wolverine}} from the ''ComicBook/XMen'' has adamantium claws in his hands. Very, very sharp adamantium claws. There are very few things that they can't cut. He {{Lampshades}} this in the first issue of his first solo series[[note]]well before the "bone claws" reveal[[/note]]:
--> The blades are pure adamantium, honed so keen they'll cut through anything. Saved my butt too many times to count.
* The Libra killer in ''ComicBook/TopTen'' did this. In reality, she was an alien in a volatile life stage, with atom-slicing filaments coming from her body.
* In ''ComicBook/{{Camelot 3000}}'', Myth/KingArthur [[ArtisticLicenseNuclearPhysics causes a nuclear explosion by cutting an atom]] on the point of Excalibur. Earlier in the story, Arthur notes that Excalibur's powers are not confined to destruction, and shoving the sword into fuel cells is enough to bring them to full power.
* In ''ComicBook/{{Legion Of Super-Heroes}}'', the Persuader's Atomic Axe can cut through anything, [[BeyondTheImpossible including the force of gravity]].
* The Vorpal Blade wielded by Boy Blue in ''Comicbook/{{Fables}}''. It's so sharp that the only time it didn't cut right through a target is because the target was the BigBad, who has placed countless millions of protection spells on himself over the years.
* In Creator/DCComics, a sharpened blade coated with "lubrilon" is so slick it can cut through anything with almost no friction.
* Vandal Savage's illegal Omicronian Knife Suit from ''ComicBook/DCOneMillion''. It used {{nanomachines}} to constantly sharpen the blades so they could "cut out your very soul".
* In the ''ComicBook/NewGods'' series, Giliotina's swords can slice through anything. Then again, [[BrickBreak she doesn't really need them]].
* Mack "Clownface" Delgado from ''ComicBook/BodyBags.'' He's a KnifeNut who is seen cutting two men in half with one diagonal stroke among other impressive feats.
* In ''Comicbook/ScottPilgrim'', Knives Chau's father has a sword so sharp it can cut clean through a streetcar!
* Warblade of the ''ComicBook/WildCATS'' can fashion parts of his body to make blades as sharp as he wants. How sharp? Sharp enough to cut the {{Nigh Invulnerab|ility}}le ComicBook/CaptainAtom.
* ''ComicBook/SinCity'''s Miho has blades that are sharp enough to slice right through human bone or, in one case, a car roof.
* In ''VideoGame/WorldOfWarcraft'' manga comics there is a tale of a dwarven blacksmith. He is regarded as the best weaponsmith in the world. After his son is killed by one of his weapons he forges the best weapon he has ever crafted for the purpose to avenge his son. To test his blade he destroys his own anvil with a single one-handed strike.
* In Marvel's ComicBook/TheMightyThor, the Asgardian warriors Lady Sif and Skurge the Executioner both carry blades (a broadsword and battle axe respectively) which are sharp enough to cut reality itself and open portals between realms.
* In a fight scene of ''ComicBook/SerenityLeavesOnTheWind'', the Operative gets into a swordfight with one of his former fellows named Denon. He ends the fight with a DelayedCausality CleanCut through Denon's entire head, front to back.
* In issue #2 of ''ComicBook/BatwomanRebirth'', a man gets his hand cut off from a single swipe of a knife no larger than a switchblade.

[[folder:Fan Works]]
* The sharpness of the Lotus Blade in the ''FanFic/BloodBondBloodOmenSeries'' of ''Kim Possible'' fanfics is more of an InformedAttribute. While it can obviously take any form that Ron likes while he's wielding it, when Kim [[spoiler: AKA the Scarred Warrior]] wields it, it becomes simply a "very hard, very sharp" sword, one "so perfect that – if one of the men of the school had been so blasphemous as to try – it could easily be shaved with." And this description comes from Sensei, who has surely seen his share of swords. On the other hand, we never see it cut anything that an ordinary sword couldn't cut, at least not when it's in sword form.
* ''Fanfic/ChildOfTheStorm'' has Zemo's sword, which cuts through people like air and can punch straight through vibranium weave clothing.
** The Swords of the Cross, e.g. ''Amoracchius''.
** [[Literature/TheDresdenFiles The Wardens' swords]], which serve as a kind of AntiMagic.
** Wolverine is also present in the story, with his (duh) WolverineClaws.
* ''FanFic/JustAnUnorthodoxThief'' allows ''all'' Servants to have weapons that can cut through any material, justified by the fact that these people are "idealized" forms of their past lives, so their weapons are as powerful as people say they were. Also includes Goemon's sword, the Zantetsuken. But in this story, it never has to cut anything.
* In the ''Kung Fu Panda''-based story ''[[http://www.fanfiction.net/s/5862877/14/Making-the-Cut Making the Cut]]'', Jo is able to cut a single strand of hair by dropping it onto the edge of his obsidian dagger.
* In ''Fanfic/MementoVivere'', a VideoGame/FinalFantasyX fanfiction, Auron's sword can cut easily through the barrel of a rifle, as well as damage any enemy the group has met to date due to its inexplicable piercing game-mechanic properties.
* Sephiroth receives a magical dagger that can cut through any substance as a present from Yuffie in ''FanFic/ShinraHighSOLDIER''.
* The punching dagger in the ''My Little Pony: Friendship Is Magic'' Fanfiction, ''FanFic/SilentKnight'', counts as this. According to one of the characters, it displays several examples also demonstrated by Real-Life blades.
* Averted in ''Fanfic/{{Sleepless}}'': the knife Diamond Tiara uses is too small to [[spoiler: sever Alula’s wing]].
* In the ''WesternAnimation/StarWarsRebels'' fanfiction ''Fanfic/EzraLost,'' a few of the characters naturally use lightsabers, fictional blades that can cleanly slice straight through almost any material.
* Nav's InfinityPlusOneSword in ''FanFic/DiariesOfAMadman'', [[spoiler: which turns out to be Excalibur]].
* The Normans in ''Fanfic/WarriorsOfTheWorldSoldiersOfFortune'' discover that, among other things, Baphomet's [[SinisterScythe scythe]] is sharp enough to slice through tree branches like paper.
* In ''[[FanFic/ThePrincessAndTheDragon The Princess and the Dragon]]'', Jean Claude possesses a sword forged from the scales of a white dragon which can cut through almost anything, including other dragons' scales.
* In ''Fanfic/WithStringsAttached'', the Hunter's {{BFS}} Blackfire, inspired by [[Literature/TheElricSaga Stormbringer]], flaming black, was sharp enough to slightly cut the {{Nigh Invulnerab|ility}}le Paul's arm and draw a bit of blood.

[[folder:Film -- Animated]]
* Near the climax of ''Disney/TheHunchbackOfNotreDame'', Frollo pursues Quasimodo and Esmeralda on the balcony of Notre Dame, all the while cleanly slicing through ''stone gargoyles'' attempting to slash at them.
* ''WesternAnimation/KungFuPanda'' featured the Sword of Heroes. "Said to be so sharp you can get cut just by looking at -- Ow!"
** [[WesternAnimation/KungFuPanda3 The third film]]'s villain Kai carries a pair of jade swords on chains that can pierce through and ''slice'' solid rock!
* ''Disney/{{Mulan}}'': Shan-Yu's sword cuts through almost ''anything''--including ''thick wooden columns!''--, ''sending them down like TIMBER!''

[[folder:Film -- Live-Action]]
* A scene in ''Film/TheBodyguard'' involves a katana and a silk scarf. The scarf falls across the katana's blade and is sliced in half by its own weight.
* In ''Film/{{Clash of the Titans|1981}}'', Perseus receives a sword from the gods that slices through a block of marble without leaving a scratch on the blade. This is the weapon that he later uses to slay Calibos. And he wasn't even trying to cut the marble, he was just a bit careless with how he lowered the sword after testing the balance and accidentally hit the marble block.
* The legendary Green Destiny sword in ''Film/CrouchingTigerHiddenDragon'' is capable of slicing through virtually any other weapon, and apparently never gets chipped or cracked, regardless of how often it gets used. Amusingly, in one of the later fight scenes there is a blink-and-you'll-miss-it shot that clearly shows the prop sword to have been severely deformed in the action sequence.
* ''Film/{{Dragonslayer}}''. Galen's lance could slice through a horseshoe, but after sharpened by magic fire, it's made sharper than sharp. It slices ''through the anvil'' with little effort.
* Kruger's katana in ''Film/{{Elysium}}''. When he stabbed [[spoiler:Julio]], he put it full length through the man ''and'' the ground beneath him with no apparent difficulty. Even with super-strength, we're talking about hard-packed earth.
* In ''Film/{{Equilibrium}}'', Cleric Preston uses a katana sharp enough to perform a DiagonalCut.
* At one point in ''Film/TheForbiddenKingdom'', the blade of the Jade Warlord's weapon is smashed into the floor, and then dragged across the room. It cuts through the stone floor like butter. Granted, this is probably a magical blade, but still.
* In ''Film/TheHobbit'', Gandalf's Glamdring beheads a goblin so cleanly that the head doesn't budge from the now stalled goblin -- complete with eyes still moving -- until Gandalf nudges it, causing it to fall. Since Thorin's Orcrist and Bilbo's small Sting come from the same elven source in Gondolin, they can be assumed to share the same quality. This is true in the book as well; Bilbo demonstrates Sting to Frodo by thrusting it deep into a wooden beam with little effort.
* Hilariously inverted in ''Film/HotShotsPartDeux''; Topper swings a sword through a candle, and it passes clean through... only for the sword to break a moment later.
* In ''Film/KickAss'', Hit-Girl (a 10-year-old girl) uses a double-bladed weapon to cleanly and ''casually'' slice the leg off one opponent, then stabs her blades through a ''metal door''.
* At the start of ''Film/KingsmanTheSecretService'', Gazelle slices a Kingsman completely in half (height-wise) with one slash of her leg-blades. She also proves capable of cutting through guns like warm butter.
* The Hattori Hanzo katana owned by the Bride in ''Film/KillBill''. "I can tell you with no ego, this is my finest sword. If on your journey, you should encounter God, God will be cut." This is a quote of [[ShownTheirWork Musashi]], although in his context it meant steeling yourself for battle no matter who faced you.
* In ''Film/MirrorMirror'', Snow White's dagger is so sharp she can slice an apple in half with a lazy flick of her wrist.
* ''Film/NinjaAssassin'' has this on every blade we ever get to see. The swords can cut a man in half, and on one occasion, the protagonist is seen slicing open a wooden floor with his [[ImpossiblyCoolWeapon kusarigama]]. The shuriken are also pretty sharp, able to slice a man's head in half or cut off two arms at once, without changing trajectory. The movie actually spends a ''lot'' of scenes showing ninja sharpening their blades.
* ''Film/TransformersRevengeOfTheFallen'' had Reedman, a robot sharp enough that it cut a soldier in half just through a full-body tackle.
* ''Underworld''
** At the end of ''Film/{{Underworld}}'', Viktor's sword is fully sharp enough to cut through someone such that [[DiagonalCut they don't fall apart immediately]].
** Subverted in ''Film/UnderworldEvolution'' when [[spoiler:Selene uses a downed helicopter's propeller to kill Marcus]].
* Machetes in ''Film/WalkHard''. They have to be sharp to cut a person in half and impressively sharp to do so on accident, but it's reaching into the realm of the absurdly sharp when you can cut yourself in half by accident.
* ''Film/XMenFilmSeries'':
** ''Film/X2XMenUnited'': Lady Deathstrike's fingernails (or talons, if you prefer) are made of adamantium and can effortlessly slice through everything in their way.
** ''Film/XMenOriginsWolverine'':
*** Wolverine's claws, which are coated in adamantium. Shortly after he receives his adamantium infusion, he slices up several items in a farmhouse bathroom (including a porcelain sink) with his now impossibly sharp claws, despite applying what appears to be no more than the force required to move an unrestrained arm.
*** Wade Wilson's katanas.
** ''Film/TheWolverine'':
*** The heirloom katana that Yukio brings with her to meet Logan is able to cleanly slice barstool legs and a beer bottle, without harming the man on the stool or the guy holding the beer bottle.
*** Ichirō Yashida's samurai swords [[spoiler:which actually cut through Wolverine's claws]].
** ''Film/{{Deadpool 2016}}'': Deadpool's katanas are able to cut through anything he uses them on in the movie with no effort on his part, with the only exception being the axes Ajax uses against him.
** ''Film/XMenApocalypse'': Psylocke's psionic blade can slice through a car as if it were a hot knife cutting butter.
* In the long-running ''Franchise/{{Zatoichi}}'' franchise, Ichi's sword cane (shikomizue) cut through candles, papers, lanterns, shōji's (doors, windows), ryō's (golden coins), wooden buckets, wooden columns, pushcarts, stone statue and katanas.
* In ''Film/PansLabyrinth'', Mercedes uses her ordinary kitchen knife to slice Captain Vidal's cheek cleanly in two. However, though the blade is sharp, it's still too small to kill him when she stabs Vidal.
* In ''Film/PacificRim'', [[HumongousMecha Gipsy Danger]]'s retractable arm blade. It can slice through a {{Kaiju}} with very little effort. The same kaiju that can withstand multiple shots from a house-sized plasma cannon. It is practically a StoryBreakerPower and is conveniently forgotten by Mako until the heroes have no other options.
** Striker Eureka's blades used in the finale inflict major wounds on Slattern, the Category Five Kaiju that was barely scorched by a multi-megaton nuclear detonation at a range of meters.
* ''Film/StargateContinuum'' has a sword who's blade is stated to be honed to the width of a single atom. [[spoiler: Ba'al used it to lop off the top of Apophis's head, and later Qetesh!Vala uses it to cut Ba'al cleanly in half with zero effort, vertically.]]
* In ''Film/DOADeadOrAlive'', an early fight between Kasumi and Ayane comes to a standstill to have Kasumi's discarded kimono fall on Ayane's katana, splitting it clean in half.

* Literature/{{Discworld}} has several examples of this:
** Both the scythe and the sword of Death , especially in ''Discworld/{{Hogfather}}''. The edges of these weapons glow blue because of the air molecules being sliced in half all the time. The sharpness even extends a few inches beyond the blade due to the impossible aura of sharpness. In ''Discworld/ReaperMan'', Death sharpens his scythe on progressively finer materials, from silk, to spider's web, to ''sunlight'', and then tests it by cutting a sentence Miss Flitworth is speaking ''into its individual words''.
** Death defeats his evil replacement with an ordinary field scythe sharpened by ''his own pure rage''. Rage isn't even "real," it's just an abstract concept.
** Carrot's sword is sharp enough to pierce a solid stone pillar. It is the long-lost sword of the Kings of Ankh, and the Disc's rules of [[TheoryOfNarrativeCausality narrative causality]] insist that such a historic weapon ''must'' be sharp enough to do such things. His ancestors specifically didn't want a magical sword; they wanted a sword that was ''really good at killing people''.
** In ''Discworld/InterestingTimes'', when a small army of samurai demonstrate their absurdly sharp blades by throwing silk cloths in the air and slicing them in two, a reference to the old Saladin/Richard legend. CombatPragmatist Cohen the Barbarian claims he can do the same with his ancient notched sword -- then, while they're all looking up at the handkerchief, he and his men decapitate nine of them. In ''Discworld/TheLastHero'', however, Cohen uses the same sword to roll a seven with a six-sided die by ''slicing the die in half'' while it's in the air, so his sword must be quite sharp. See example under "Myths & Religion", below. The whole extended sequence is a ShoutOut / ContinuityNod to the original use of this device in ''Discworld/TheColourOfMagic'', where the Lady outwits Fate as her die flipped gently onto a point, spun round, and came down a seven.
---> ''Come on, play fair!''
** ''Discworld/WitchesAbroad'' has a much more mundane example.
--->"Every established kitchen has one ancient knife, its handle worn thin, its blade curved like a banana, and so inexplicably sharp that reaching into the drawer at night is like bobbing for apples in a piranha tank."
* ''Literature/TheDresdenFiles''
** Throughout the series, you see the Warden's specially enchanted swords, which cut through demons, summoned constructs, and enchantments with ease. WordOfGod explains that while these swords are indeed magical, their sharpness is simply due to them being really well-made swords.
** Played straight with the Knights of the Cross' holy blades. One cut right through a ''steel door''.
* One of the evil empire's primary advantages in the Literature/FarsalaTrilogy is that their folded steel blades ('watersteel') can cut through the Farsalan weapons, though with their superior numbers, much smaller egos, and much greater brains than the first line of Farsalan defenders they hardly need them.
* In the ''Cross Time Engineer'' novels by Creator/LeoFrankowski, Conrad Stargard has a sword that regularly slices through armor, body parts, anvils, and other swords. He thinks it is just really good steel. In reality, it has a diamond edge and was made by the same [[MagicFromTechnology highly advanced]] people who accidentally sent him to the [=13th=] century.
* In the ''Literature/{{Sten}}'' novels by Allan Cole and Chris Bunch, the signature weapon of the eponymous hero is an absurdly sharp knife that can cut almost everything, even diamonds. And he keeps it hidden ''inside'' his arm.
* In ''Literature/ThePrincessSeries'', Danielle Whiteshore- Literature/{{Cinderella}}- possesses an enchanted glass sword as the final gift from her mother's spirit, capable of cutting through anything apart from Danielle's own flesh.
* In his ''World's End'' series, LinCarter uses a super sharp sword, in Ganelon Silvermane's "Silver Sword", although it won't quite cut anything -- there are limits, it seems.
* In ''Literature/TheSilmarillion'', the knife Angrist, a knife that can "cleave iron like green wood..."
* In ''Literature/TheLordOfTheRings'', high elven blades are sharper than anyone else's and the blades hold their edge forever. Then there's the dwarven-made Narsil, which is absurdly sharp even by elven standards.
* In ''Literature/TheReynardCycle,'' Isengrim No-Father's sword, Right-Hand. On several occasions it cuts through (or breaks) swords of inferior make.
* ''Literature/ASongOfIceAndFire'' has several examples:
** Blades of Valyrian steel are far sharper and stronger than even the best mundane steel. Forging the metal is a magical process that has become LostTechnology after the fall of Valyria and only a few smiths still know how to re-purpose it. It has a smoky, rippled appearance that resembles Damascus Steel. It's also the only metal that's a match for a [[TheDreaded White Walker]] and their weapons (the only other thing that can slay a White Walker is a naturally-occurring substance that's known to be sharp but not to the extent of this trope: dragonglass, what we know as obsidian).
** Dawn, the ancestral blade of House Dayne. The blade was forged from [[ThunderboltIron meteoric iron]] and is hinted to be of extraordinary quality. [[KnightInShiningArmor Arthur Dayne]], the Sword in the Morning, notably used it to hack a foe's sword to bits, then chivalrously allowing him to retrieve another sword before slaying him. Jaime Lannister also recalls that the sword cut through his tunic and into the flesh beneath when Dayne tapped it against his shoulder to knight him.
%%* [[SwordOfPlotAdvancement Kosall]] in ''Literature/TheActsOfCaine'' combines this with {{Vibroweapon}}.
* In ''Literature/{{Everworld}}'', Coo-Hatch steel is used to make absurdly sharp blades. The Coo-Hatch show off by cutting a tree into pieces, which stand for several seconds before falling, and then cutting the falling pieces with throwing blades. Later, a Coo-Hatch pocketknife is used to ''tunnel through rock''. Very slowly.
* In the ''Literature/InheritanceCycle'', Angela the Herbalist has a sword she calls "Tinkledeath" which is so sharp that it can literally cut through anything as if it were custard. Throughout the series, all Riders' swords are imbued magically such that they never rust or dull and can defeat or outright ignore most enchantments. They're also forged using a rare meteorite that the sword smith Rheunon named "Brightsteel" which has a notable crystalline structure. The same is true of Eragon's first Riders' sword, Zar'roc. After getting a new sword in ''Brisingr'', Eragon was able to cut through a portcullis and then the door behind it.
* The contemporary fantasy novel ''Into the Out Of'' by Creator/AlanDeanFoster features an African master woodcarver who furnishes the heroes with ''wooden'' knives and spears so sharp they give you a paper-cut like cut just from touching the edges of the blades and can be thrown right through a wall. You can't even quite make out where the edge of one of them ends and the air begins, they're so sharp. As one of the characters describes them:
-->"They are wood, but they are anything but ordinary. There are no other such weapons anywhere in the world. They are blackwood plus history, blackwood plus a little of every weapon that has ever been. There are the spears of the great Zulu impis in each edge, the power of Tamerlane's hordes, the thrust of Caesar's legions. On the very edge of each swim things that race the components of existence around racetracks on which the beginning and end of the universe is the bet. They contain weapons that have not been and weapons that will never be. They are blackwood plus all that plus Nafasi. Into them he has put his heart and soul and much more. They will cut well. I think they will even cut a [[TheLegionsOfHell shetani]]."
* In one of the ''Literature/LeftBehind'' novels, [[EvilOverlord Carpathia]] is slain with a sword that's supposedly sharp enough to sever half of someone's fingers off, before they even notice they're being cut.
* ''Literature/TheWheelOfTime'' series brings us Power-wrought blades. They can cleave through metal armor and the tough flesh of a [[TheUsualAdversaries Trolloc]] with limited resistance. Lan notes that they never need to be sharpened though some men have been known to try, resulting in wearing a whetstone to nothing for no good reason.
* "One, two! One, two! And through and through, the vorpal blade went snicker-snack!" - from ''Jabberwocky'', in Creator/LewisCarroll's ''[[Literature/AliceInWonderland Through the Looking-Glass and What Alice Found There]]'' (1872).\\\
Though Carrol refuses to explain what "vorpal" means, popular {{Fanon}} is that it means "sharp". Thus, Vorpal Swords and vorpal weapons have since made appearances in numerous video games as weapons with AbsurdCuttingPower, often with the ability to inflict a OneHitKill (usually via beheading).
* Flann O'Brien's ''Literature/TheThirdPoliceman'' features a spear so sharp that if you were to prick yourself with it, your finger would begin to bleed about two inches before the point appeared to reach your finger. In fact, when your finger starts to bleed, the spear point had penetrated your skin two inches ago, but was so thin it slipped between the atoms of your finger without causing any damage.
* ''Literature/{{Animorphs}}'' has Andalite tail blades that seem to be able to cut through pretty much anything. Although, at one point, Tobias (in Andalite morph) gets his tail blade stuck in the trunk of a tree he was practicing on, much to Ax's amusement.
* The main character of the ''Literature/{{Safehold}}'' series has one of these, it's made of some super-hi-tech alloy that's nearly indestructible to boot, he actually considered making an even sharper blade with an edge SharpenedToASingleAtom, but decided that was overkill. It helps that the character in question is a {{Ridiculously Human Robot|s}} with SuperStrength who can thus put enough force behind the blade to slice an opponent's own sword into bits. Later he gives another character a similar blade.
* There's one of these in ''The Magic and the Healing'' [[http://www.isfdb.org/cgi-bin/title.cgi?7249 ]] by Nick O'Donohoe.
* ''Literature/TheDevilsDictionary'''s article on [[http://www.alcyone.com/max/lit/devils/s.html Scimitars]] has a lengthy passage on an executor flourishing his sword before lightly tapping the condemned man's neck. He is later called in to explain why he didn't kill the man, and realized he had in fact ''[[YouAreAlreadyDead decapitated himself]]'' while showing off.
* Shardblades in ''Literature/TheStormlightArchive'' are an interesting variation. They are explicitly magical weapons, and can slice through any non-magical material -- stone, metal, etc -- without slowing. They only things they don't cut are other Shardblades, [[PoweredArmor Shardplate]], and living flesh. The latter the blade simply passes through without marking, and "kills" the part of the body it passes through, as if severing nerves without touching anything else. If it passes through any part of the spinal cord the victim dies instantly, and their eyes burn out. It's implied that the blade in fact [[SoulCuttingBlade cuts the soul.]]
%%The Subtle Knife in ''Literature/HisDarkMaterials'' is not an example because it is a magical example of AbsurdCuttingPower.
* In ''{{Literature/Shadowboy}}'', Icerazor's sword is among the few things reliably able to carve through force fields and psychic constructs, making steel (galvanized pipe, Omicron bots) mundane in comparison.
* Ia from ''Literature/TheirsNotToReasonWhy'' occasionally uses a [[AppliedPhlebotinum crysium]] bladed sword, which she uses to cut steel and harder materials.
* In ''{{Literature/Shadowdemon}}'', Icerazor's sword makes a return, carving through steel plate armor to create handholds to climb a HumongousMecha .
* In ''Literature/ForgingDivinity'', the Sae'kes has a cutting aura that appears to disintegrate anything it comes into contact with. It's such a powerful weapon that [[spoiler: Taelien, who owns the weapon currently, can't even use it properly after years of training]]. It's also been shown cutting into [[spoiler: other powerful artifacts, such as the Heartlance]].
* Invented in ''Literature/TheThreeBodyProblem'', and put to good use slicing a ship apart.
* Played realistically in Creator/TimothyZahn 's Literature/HandOfThrawn duology with "molecular stilettos," pocketable knives that can cut through almost anything... but are also absurdly delicate, to the point that even a simple cutting job is as likely as not to ruin the blade. Using them to attack a person is considered both overkill and wasteful.
* The Subtle Knife from ''Literature/HisDarkMaterials'' would definitely qualify, being a blade sharp enough to slice through reality itself.
* In ''Literature/SpiritHunters'' Sura's hoko yari, "Leaf-cutter". At one point, a fly flies into the edge of the blade and is bisected instantly.
* ''Literature/Nightside'', Razor Eddie. His razor can cut through space, forming portals.
* In ''Literature/TheTraitorSonCycle'':
** The Red Knight's ''ghiavarina'' (a heavy spear), can cut through anything as easily as it does through air. The first time he uses it, he accidentally buries it blade-deep in solid rock because he didn't feel any resistance.
** Tom Lachlan's sword has been made by the same dragon who's created Red Knight's spear, and as such has the same qualities.
* ''Literature/MagnusChaseAndTheGodsOfAsgard''. Magnus' sword, Sumarbrandr, a.k.a [[EmpathicWeapon Jack]]. It's said to be the sharpest sword in the nine worlds and more than lives up to its reputation, being capable of slicing steel, enchanted rope, and ''the fabric of reality''.
* ''Literature/WayOfChoices'' has Stainless, the sword Chen Changsheng receives from his master which is paired with a scabbard that doubles as a BagOfHolding. In the TV show, it's called the purity blade.
* ''Literature/MalazanBookOfTheFallen'':
** It seems that all Hust Swords were like this, but most, if not all of them were lost. [[spoiler:Yedan Derryg]], wielding one of them in ''Literature/TheCrippledGod'', can decapitate ''a dragon'' in two hits, and just the fact of owning the sword changes him into an OneManArmy.
** The Whiteblade is made from chaos and will cut through most things like butter. If you do not know how to properly handle it, just touching the blade will cost you fingers or even a hand.

[[folder:Live-Action TV]]
* ''Series/GameOfThrones'':
** Any blade made from Valyrian steel, as the forging secrets (long since lost) allow them to keep their edge way longer than regular steel.
*** Dark Sister was this even more than most Valyrian steel weapons, since it was designed ''for'' Visenya, and was therefore skinnier and more flexible than the typical broad or longsword, and thus had to rely on sharpness for cutting power more than raw force. It was not, however, a rapier like Arya's Needle.
** The crystal blades of the White Walkers shatter regular steel on contact and slice through armour with ease.
* In an episode of ''Series/MisterRogersNeighborhood'', Jay O'Callahan told the story "The Bubble", about a king stuck in a giant bubble and his attempts to get out. One of the knights who failed to pierce the bubble had a sword so sharp it "cut the wind and made it bleed".
* Parodied in an episode of ''{{Series/NewsRadio}}'' Matthew gives Bill a katana which Bill thinks is fake. When Bill realises it's real he drops it and it cleanly cuts off a piece of a nearby table as it falls.
* The 1998 television series ''[[Series/{{Merlin1998}} Merlin]]'' has an example of Excalibur that fits this interpretation. Just parrying a weaker sword will cut the weaker sword in half.
* In ''Series/TeenWolf'', werewolf claws, despite looking almost like 'normal' sharpened human nails, can substitute a knife to cut cable and rake through metal effortlessly.
* An episode of ''Series/{{Warehouse 13}}'' revolved around the threat of the assembly of ''the'' {{UsefulNotes/Masamune}}. The sword was so sharp, it could cut through light, rendering the user invisible. That was clearly a bit of hyperbole though, since that function didn't work until the tsuba (the little circle thing above the hilt) was reattached. That said, the sword is absurdly sharp in its own right, as it was able to slice through a computer monitor and stab in a man's shoulder effortlessly.
-->'''Pete:''' You sure you want me to just pull it out?\\
'''Artie:''' It's the sharpest sword ever created, it should slide out like butter.\\
'''Pete:''' ''[pulls the sword out]''\\
'''Artie:''' ''[crying out in pain]'' Not like butter!
* In an episode of ''Series/{{Castle}}'' ("Heroes & Villains", s4e2), a victim is laterally bisected apparently through his skull by what turns out to be a samurai sword.
* Happens several times in ''Series/{{Highlander}}''. Particularly with Duncan. He chops a heavy oak desk clean in two with his katana, and a one point beheads a opponent with a fairly light sword with little more than a few inches of movement. The samurai he got his sword from also used it to cleanly slice another sword in two as easy as if were a piece of bamboo. Though in general there seems to be something about Immortals that makes the swords they wield have more cutting power than they should.
* One of the Salamanca cousins in ''Series/BreakingBad'' carries a chromed fire axe. It's sharp enough to stick in pavement just from being accidentally dropped.
* The Scythe in ''Series/BuffyTheVampireSlayer'', which is actually more of a Lochaber Axe but regardless it's absurdly sharp. Moments after acquiring it, Buffy effortlessly bisected the super-strong and super-durable [[TheDragon Caleb]]. Earlier, there was also the Blessed Sword used to defeat Acathla, which also cut through vampires' necks like a hot knife through butter.
* Subverted in the ''Series/{{Nova}}'' episode [[http://www.pbs.org/wgbh/nova/ancient/secrets-viking-sword.html "Secrets of the Viking Sword"]]. A swordsman cleanly chops a rolled-up bamboo mat in half with a wickedly sharp katana, but then does the exact same thing with a European broadsword and demonstrates afterwards that it has little edge at all. The trick has more to do with the swordsman's skill than the actual sharpness of the sword.

[[folder:Myths & Religion]]
* Some incarnations of Myth/KingArthur's sword Excalibur fit this trope. Depending on which legend you're reading (and which interpretation of the legend), Excalibur is either the most powerful blade ever worn by a British king, or else was just a sword. Most linguists believe that "Excalibur" is ultimately derived from the Welsh name "Caledfwlch" meaning "hard cleft".
* Myth/NorseMythology: According to ''Literature/TheSagaOfHervorAndHeidrek'' the dwarf-forged sword Tyrfing was the sharpest blade in the world and cut "into iron and stone as if into cloth"; its blows could not be stopped by anything "before it plunged into the earth."
* In Myth/IrishMythology, Cuchulainn's sword can shave a hair from the skin without cutting the skin, or cleft a hair floating on water in twain, or cut a man in two "[[DiagonalCut that the one half of him might not miss the other for some time after]]". [[note]]The ability of a sword to shave hairs was impressive because of the sheer thickness of the blade (and thus the trouble of getting a very sharp edge without burrs). Some swords of antiquity were in excess of 1/4" thick. Having a sword capable of field combat yet also able to shave hairs was a sign of superior bladesmithing.[[/note]]
* There are claims that certain units of lancers from Eastern Europe and Eurasia (it has been attributed to Polish lancers and Cossacks) would shave with the tips of their lances before battle, and if their commander could see any stubble or nicks on their chin, then their weapons weren't sharp enough for battle.
* A popular Japanese legend[[note]]"Legend" being the operative word, since the people we are about to mention weren't alive at the same time[[/note]] tells of a competition between two famous swordsmiths: [[AxCrazy brilliant but slightly unbalanced]] Muramasa Sengo, and even more brilliant and universally revered Masamune. Each smith held his sword tip-first into a gentle brook, with the edge facing upstream. As leaves floated down on the current, Muramasa's sword cut them neatly in half as they wafted against the blade. Leaves that encountered Masamune's sword, however, would make a 90-degree turn and avoid the blade altogether, in a Crowning Moment of Zen. In other versions of the legend, the leaves that Muramasa's blade cut, Masamune's blade healed together. In yet other versions the blades were placed in the river and floated downstream. Muramasa then argued that his blade was finer since it cut the leaves, Masamune pointing out that such a blade was inherently evil and bloodthirsty, which his wasn't, therefore was superior.
* In American tall tales, Pecos Bill's razor was so sharp he shaved with just the shadow of it! (Which means he [[PermaStubble didn't shave so well]] on cloudy days, when the shadow was dimmer and fuzzier.)
* In the tale of Myth/WaylandTheSmith'' within ''Thidrek's Saga'', Wayland makes a sword, Mimung, so sharp that he slices the competing smith Amilias from the head down in half with one stroke, complete with his extremely thick armor, and Amilias [[DiagonalCut didn't realize this]] until he was asked to shake, at which point he fell apart.
* There's an apocryphal legend about UsefulNotes/{{Richard the Lionheart}}ed having a conversation with Saladin about their respective swords. Richard requests an iron bar, and chops through it cleanly. Saladin shrugs, and requests a silk pillow. Richard's sword fails to even mar it, while Saladin's scimitar slices it neatly in half. [[RuleOfCool More fanciful]] versions of the story have Saladin letting a silk veil fall across the edge of his scimitar, and cutting ''itself'' in half, while Richard was able to split an ''anvil''. The legend is regurgitated in ''Literature/TenSixtySixAndAllThat''.
* A 20th-century apocryphal tale has a burly Afrika Korps infantryman going hand-to-hand with a Gurkha. The latter delivers a throat-high slash with his [[KukrisAreKool kukri]], which the German doesn't even feel. "You missed!" he snarls, preparing to skewer the little Nepalese guy with his bayonet. Unperturbed, the Gurkha just says "Nod your head...". [[DiagonalCut And, of course...]]
* Islamic folklore has Zulfiqar, Ali's sword. It was found by Muhammad in the Mecca temple of Ishtar, and described as a long scimitar with a curious forked end. According to the legend, the archangel Gabriel constantly chained the true power of Zulfiqar since it was so sharp that at full force it could create RazorWind that would cut mountains apart. Another myth says that Ali killed an enemy knight by beheading the horse and slicing the knight in half with a single slash.
* According to the Norse/Germanic saga of Sigurd/Siegfried, same hero's sword Gram/Balmung/Nothung was so sharp that he tested it by ''slicing an anvil in half''.
* There are referents to this feat in both Norse and Irish mythology, the trick being attributed to both Finn [=McCool=] and to King Olaf of Norway, when in a dispute with the King of Sweden over ownership of an island, they diced for it. The Swedish king rolled two sixes, knowing this was unlikely to be beaten. Olaf rolled two dice, one coming down as a six, and the second induced to come down as a winning seven due to the intervention of his sword-blade slicing the dice in half. This was referenced by Terry Pratchett in the ''Literature/{{Discworld}}'' (See ''Literature'', above.)
* Durendal, the legendary sword of Roland, was said to be the sharpest sword in existence. Roland's attempts to destroy it to prevent it falling into Muslim hands resulted in [[https://en.m.wikipedia.org/wiki/La_Brèche_de_Roland this]] happening.

* In ''Creator/SternPinball's'' ''[[Pinball/XMenStern X-Men]]'', Franchise/{{Wolverine}}'s claws are shown slicing through the playfield. The Wolverine Limited Edition table also has his claws gouging the sides of the backbox.

[[folder:Tabletop Games]]
* [[http://knowyourmeme.com/memes/katanas-are-underpowered-in-d20 Katanas are underpowered in d20.]]
* Creator/GamesWorkshop games:
** The [[CoolSword mighty blade]] of the Blood God [[WarGod Khorne]] in ''TabletopGame/{{Warhammer}}'', ''TabletopGame/WarhammerAgeOfSigmar'' and ''TabletopGame/Warhammer40000'' is so sharp that, when imbued with the strength of his endless rage, it is capable of splitting the very fabric of reality itself.
** ''TabletopGame/{{Warhammer}}'' has the Runefangs, dwarven-made swords that are wickedly sharp. There are twelve of them, each made for one of the Elector-Counts of the Empire. None of the people the swords were made for lived long enough to use them, because the dwarves wanted them to be perfect and it took longer than a human lifetime for the smith to make them all. The descendants of the original intended owners use them just fine.
** ''TabletopGame/WarhammerFantasyRoleplay'' allows runesmiths to create more Runefangs by adding the master rune of Alaric the Mad (the smith of the original Runefangs) to weapons. To keep this from being overpowered, creating a new Runefang can only be done by a master runesmith (a tertiary career), will take ''years'' for a PlayerCharacter even without failing any checks (making a sword that can become an absurdly sharp blade for a single blow is easier, taking a few days' off-time), and it's explicitly verboten for a runesmith to ever create two weapons with identical runes on them (that Alaric did this is why he's called 'the Mad'), and master runes occupy all slots on a weapon.
** ''TabletopGame/Warhammer40000'':
*** The background information frequently describes bladed weapons as having "Monomolecular edges", especially on the chainswords and power swords used by [[SuperSoldier Adeptus Astartes]] and the various edged weapons used by the [[SpaceElves Aeldari]].
*** The blades of the phase swords used by Imperial Callidus Assassins slip in and out of realspace, allowing them to cut through any absolutely anything, from the thickest armour to the most sophisticated of [[DeflectorShields force fields]].
*** The [[WolverineClaws lightning claws]] melded to the hands of a [[TheCorruption Chaos]] [[SuperSoldier Warp Talon]] are described as being spirit-sharp. These claws are so sharp that they are even capable of slicing through the veil between [[HyperspaceIsaScaryPlace the Immaterium]] and the physical universe.
*** The [[MachineWorship Adeptus Mechanicus]] relic weapon known as [[NamedWeapon The Red Axe]] is a massive Omnissian axe whose cutting edged was made with a unique [[ThunderboltIron starmetal]] that emits a [[PowerGlows crimson glow]]. The weapon is said to be able to cleave through even the toughest material, something the 8th Edition ''Warhammer 40,000'' rules represent by giving The Red Axe the highest Armour Penetration value of any weapon available to an Adeptus Mechanicus army.
* ''TabletopGame/DungeonsAndDragons''
** Weapons made of adamantine bypass most objects' hardness -- meaning that, essentially, they're so sharp that they can cut steel (hardness 10) as easily as paper or cloth (hardness zero). Of course, this ability only works on objects up to hardness 20, meaning that adamantine (hardness 20) cannot [[LikeCannotCutLike cut itself]].
** The major artifact sword Angelwing Razor is so sharp, it can cut through literally anything, bypassing all forms of hardness and damage reduction. This includes barriers of pure magic that have no actual material substance.
** There is also the Vorpal enchantment which can be added onto any sword. Not only does it require the weapon to be heavily enchanted to even hold the ability, it makes the blade in question so sharp that upon a successful critical strike, it automatically severs the neck of whatever it hit in a single blow.
* The ''TabletopGame/{{Everway}}'' RPG had among its legendary artifacts a sword named the "The Edge of Light and Darkness", which was created to exemplify "the dividing line between ''Is'' and ''Is Not''". The Edge of Light and Darkness could cut anything its owner could conceive of cutting, and could wield the blade with sufficient skill to hit. In addition to the relatively mundane task of doing a CleanCut through any physical substance, known examples include cutting through the fabric of space-time to create portals between alternate universes, killing an opponent by cutting his soul free of his body (without actually leaving any physical wounds on his body), and destroying a pocket universe by slicing the substance of reality into its fundamental elemental components.
* ''TabletopGame/SeventhSea'' has the crescent-shaped scythe of the NPC Captain Reis, which allows him to cut through anything -- even armor made from Dracheneisen, the ''7th Sea'' version of {{Mithril}}, gets cut in half like so much butter.
* ''TabletopGame/NewWorldOfDarkness'' has a supplement called ''Dudes of Legend: How To Be Fucking Awesome''. It contained- among rules for using your genitalia as a bludgeoning weapon, instituting experience charts for kills and other things that ran completely contrary to the intended feeling of nWoD- a hack that let you wield a katana that had the 7-Again quality, allowing you to reroll any result of 7 or higher on a d10. Considering that the system only counts successes at 8 or higher, and rerolls at 10, you will reroll every success you manage to get, again and again. It's explicitly intended to simulate these kinds of weapons.
* ''{{TabletopGame/GURPS}} Ultratech'' has a number of (increasingly super-science) ways of justifying this. Superfine blades divide damage resistance by two. [[SharpenedToASingleAtom Monowire and nanothorn]] blades divide damage resistance by ten, and the latter is additionally described as ''shredding'' molecular bonds.
* In ''TabletopGame/{{Exalted}}'', assorted magic allows blades to cut through everything, up to and including spirits, mountains, memories, souls and reality, amongst other things.

* Based on stories similar to those in the Myths and Legends section, above, Music/RichardWagner in his music-drama ''Theatre/{{Siegfried}}'', has the eponymous hero, after he has [[ForgingScene reforged]] his father's sword Nothung, use it to slice in two the anvil he has formed it on.

[[folder:Video Games]]
* ''VideoGame/DevilMayCry''
** WordOfGod says that Dante's blade is capable of slicing absolutely anything in the physical plane. Not very convincing after the series' later graphical pushes (the rust and nicks become more pronounced). GameplayAndStorySegregation is in effect as it still will take several hacks to down any foe.
** The Rebellion is upstaged by that of the Yamato, [[EvilTwin Vergil's]] trademark sword, which is capable of ''cutting through dimensions''. Although, it being able to cut through absolutely everything doesn't apply during gameplay. Otherwise, it would be even more OP.
* ''VideoGame/{{Darkstalkers}}'' has Bishamon's ancient blade, Kien. The sword was originally forged because talented warriors were frustrated that their swords had dulled irreparably. Thus Kien was crafted -- using forbidden techniques -- in such a way that it actually became ''sharper'' the more it was used, meaning a ''stronger'' blade from multiple battles. However, Kien eventually fell into the presence of the demonic Hannya, "the armour of hate", and was subsequently corrupted, gaining a thirst for blood...
* Throughout the Franchise/FinalFantasy series:
** In ''VideoGame/FinalFantasyVII'' Sephiroth's Masamune: in one scene in ''VideoGame/CrisisCore'' where he's fighting Angeal and Genesis, Sephiroth tears apart a gigantic cannon with it by slicing through the barrel with SwordLines from the blade during the fight. That's one bad-ass sword.
** Odin's OneHitKill attack cuts (''Zantetsuken'') all monsters on the battlefield in half.
** In ''VideoGame/FinalFantasyVIII'', [[RivalTurnedEvil Seifer]] ''cuts Odin in half''. Which caused the Zantetsuken to go spinning off into the sky, cutting a hole clean into another dimension. Specifically, the Interdimensional Rift from ''Videogame/FinalFantasyV'', where it was caught by Gilgamesh.
** In ''Anime/FinalFantasyVIIAdventChildren[=/=]Complete'', Sephiroth's Masamune and Cloud's Fusion Swords are capable of not only slashing cleanly through massive pieces of concrete buildings that are far larger than the swords themselves ([[{{BFS}} which is saying something]]), but setting the edges of the cut concrete ''on fire''. Of course, the swords, despite repeated clashing, never damage each other.
* ''VideoGame/SamuraiShodown II'' features Cham Cham, resident CatGirl with her ImprobableWeapon, a wooden boomerang used for melee combat. It's considered sharp by the game, enough that (in the original releases) you could trigger the game's DiagonalCut death animations if you ended a match with a strike from it. Or if you pitched it at an enemy. Her claws work the same, too. 'Oh! How dangerous a boomerang is!'
* In ''VideoGame/SuperRobotWars'', there is nothing that Sanger Zonvolt's [[{{BFS}} Zankantou/Colossal Blade]] cannot cut. It achieves this by having thrusters on the non-bladed side, allowing it to keep cutting even when it should get lodged into its target. This allows it to cut through huge battleships, hence the name "Zankantou", but it still breaks when it tries to cut into Giganscudo's {{Unobtainium}} armor. The Type 3 blade, however, is made of liquid metal and [[RuleOfCool Runs on Badassoleum]], making it more an example of this trope.
* Youmu's sword from ''VideoGame/{{Touhou}}''. "The things that can't be cut by my Roukan Blade, forged by [[UltimateBlacksmith Youkai]], are close to none!" It is able to cut ''spirits'' and possibly other intangible things. However, her ''other'' sword, Hakurouken, while not as absurdly sharp it has the power to cut ''confusion'', to the point of potentially giving instant enlightenment to spirits. It however still hurts humans.
* In ''Touhou Soccer'', Youmu takes this to [[UpToEleven an over the top level]] by [[http://www.youtube.com/watch?v=fDjtg1K8gkQ cutting the moon in half]]. As the description for Roukanken the equippable item in Touhou Soccer states: "A certain gardener's personal sword. It cannot cut through the ball. [[LampshadeHanging Just what is that ball made of, I wonder.]]"
** [[{{Pun}} "Close to none."]]
* At the beginning of ''VideoGame/{{Xenosaga}} Episode II'', [[BadassBookworm Jin]] is introduced when he slices a HumongousMecha in half with his sword while on foot.
* In ''VideoGame/NetHack'', the Tsurugi of Muramasa and Vorpal Blade each have a 5% chance of bisecting (in the case of the former) or decapitating (in the case of the latter) what they hit, causing instant death.
* ''VideoGame/DwarfFortress'' has adamantine blades that are so sharp they cut through giant elephants like they are butter. A proper look at the raws reveals that the sharpest possible edge one can give an adamantine weapon is ten times as sharp as the best possible edge a steel weapon can be given. The latter can already decapitate a giant bronze statue in one swing in skilled hands; the former can do without the "skilled hands" part, and will tear anything into bloody confetti even when given to a weakling that's never trained a day in his life.
* In ''VideoGame/ChronoTrigger'', once repaired, the Masamune sunders a passageway into a mountain.
* In ''VideoGame/SkiesOfArcadia'', Ramirez's sword is described as being sharp enough to cut through ''light'' (which appears to be evidenced by his powerful "Silver Eclipse" attack).
* Rayne's wrist blades in ''VideoGame/BloodRayne'' cut through bone as easily as air. Also wood, stone, many kinds of metal -- anything that can be [[DieChairDie demolished in the environment]] she can put a blade through as easily as waving her hands.
* ''VideoGame/FalloutNewVegas - Dead Money'': The Sierra Madre Casino's kitchen staff believed that the Cosmic knives they were supplied were ''too'' sharp for their needs. Sure, they could slice through a T-bone steak with no problem, but they'd cut through their cutting boards and their own fingers just as easily.\\\
[[GameplayAndStorySegregation Their effectiveness in combat, though, does not meet the description.]] {{Justified|Trope}} in that they've spent 200 years in a corrosive, toxic miasma. The chemicals probably dulled them somewhat; however, they're still very effective limb loppers, which is good in an environment where most enemies are best dealt with by lopping off a limb. You can actually clean the blades; still not quite the trope, but close—they become ''twice'' as good at cutting off limbs.
* Geralt of Rivia's swords in ''VideoGame/TheWitcher'' are described as being absurdly sharp. Later on in the game the player [[spoiler:kills Vincent. The Guards originally believe only a Scythe would have been sharp enough to kill him]].
* ''VideoGame/BaldursGateII'' has the Silver Sword, which is a vorpal blade as outlined under the ''Dungeons & Dragons'' rules above. It has a 25% chance to instantly kill anything it hits. (Although most bosses are immune.) The ExpansionPack, ''VideoGame/BaldursGateIIThroneOfBhaal'', added the [[AnAxeToGrind Axe of the Unyielding]] and the [[BladeOnAStick Ravager halberd]] which have a similar chance for an instant kill.
* In the ''VideoGame/MetalGear'' universe:
** Raiden gets one in ''VideoGame/MetalGearRisingRevengeance.'' Part of the gameplay mechanics involve Raiden being able to slice HumongousMecha into pieces.
** All [[VibroWeapon High-Frequency swords]] in ''VideoGame/MetalGearRisingRevengeance'', while not conventionally absurdly sharp, can slice through almost anything thanks to their vibration destabilizing the molecules of materials they impact on. Jetstream Sam's Murasama, however, was made from an authentic Muramasa, meaning it's both absurdly sharp conventionally plus augmented with VibroWeapon power. It slices Raiden's cyborg arm off with ease, and it's the only weapon capable of damaging [[spoiler: Armstrong's nanomachine armor, which can absorb the [[HumongousMecha mecha-tossing]] Raiden's blows without a scratch.]]
* ''VideoGame/DeusEx'' has the Dragon's Tooth sword; the blade is made entirely of nanomachines which constantly re-arrange themselves to maintain the sharpest edge possible.
* In ''VideoGame/ChivalryMedievalWarfare'', it is possible to behead or dismember someone by swinging weapons such as hunting knives and spears.
* In later ''{{VideoGame/Ultima}}'' games, there is the Glass Sword. Good news: one hit should kill anything. Bad news: it only lasts for one hit.
* ''VideoGame/DeadRising'', ''VideoGame/DeadRising2'', and ''VideoGame/DeadRising3'' all feature everyday bladed weapons with peculiar sharpness. Many bladed weapons cut right through a human body in a single blow with practically no resistance, including a few where you'd ''really'' need to put some effort into it such as weapons whose cutting edge consists of a chef's knife or meat cleaver. Amusingly, zombies that are killed in such fashion don't display things like bones, muscle, or viscera, but only feature [[MadeOfBologna a pink, Spamlike interior]] beneath their skin--perhaps inadvertently explaining their fragility, but [[VoodooShark that just raises other questions]].
* ''VideoGame/TimeKillers'' has a variation. Every weapon is capable of cutting off arms and heads. However, what's less known is that Thugg's off weapon can cut off arms. What exactly is the grunting, musclebound caveman's off weapon, you ask? His ''fingernails''.
* The [[EvolvingWeapon Psyphers]] of ''VideoGame/OdinSphere'' are among the most powerful weapons in the game's universe, being one of the few, if only weapons, that can pierce [[SuperToughness dragon scales]]. It's highly likely that none of the characters would have gotten as far as they did without them, [[spoiler:considering they have to fight, along with the aforementioned dragons, armored warriors, mystical mages, undead monsters, lava beings, and the five beings destined to bring about TheEndOfTheWorldAsWeKnowIt, which include {{Cerberus}}, an undead {{Cerberus}} lord, [[BigRedDevil the king of the aforementioned lava beings]], a HumongousMecha, and a [[{{Kaiju}} dragon larger than the continent]]]].
* ''VideoGame/MinecraftStoryMode'': [[spoiler:The enchanted weapon made for the final battle in Episode 4, able to slice Wither Storm tentacles with ease]].
* ''VideoGame/SonicAndTheBlackKnight'': Excalibur, [[spoiler:the [[SuperMode true form]] of [[TalkingWeapon Caliburn]]]] is powerful enough to slice through the armor of the BigBad, which is even more impressive given the armor in question was created using the [[CompleteImmortality immortality-inducing power]] of King Arthur's scabbard. [[spoiler:Caliburn]] even [[BadassBoast states there's nothing Excalibur can't cut]] [[PreMortemOneLiner right as Sonic punches right through the armor for the finishing blow]].

[[folder:Web Animation]]
* Baninja's "katanana" in ''WebAnimation/BananaNanaNinja'' is a tiny sword wielded by a banana, which can cut through the roof of a bus and cleave through HumongousMecha. He stores it in his ''head'', disguised as his stem.
* In ''Machinima/RedVsBlue Revelation'', Tex's combat knife is sharp enough [[spoiler: to pierce the Meta's armor when Washington throws it]].
* ''WebAnimation/HappyTreeFriends'': Absurdly Sharp [[UpToEleven Anything]].
* ''WebAnimation/DSBTInsaniT'': Asia can create a giant sycamore seed to use as a sword!

* In ''Webcomic/TheDreadful'', during a non-canon advertising intermission, heroine Kit is depicted effortlessly slashing villainous monkeys to bits with a sword that is apparently made from a single large feather.
* In Garth Graham's ''WebComic/FindersKeepers'', there is a knife that is literally, the Cutting Edge. Of course, ''Finder's Keepers'' is about the realm of Faerie, so [[LiteralMinded things are automatically literal]].
* Bro's swords in ''Webcomic/{{Homestuck}}'' have cut through wooden ventriloquist's dummies, (extremely shitty) swords, ''meteors'' and [[ArsonMurderAndJaywalking the design on Dave's shirt]] ''[[BeyondTheImpossible without cutting the shirt]]'' in one stroke. [[SerialEscalation Later he tops the record once more]], by cutting into the Beat Mesa, which otherwise requires Infinity Plus One Magical Needles to do. Presumably, [[spoiler:Dirk's sword is capable of the same thing since [[ItMakesSenseInContext he is Bro.]] It's revealed that this sword is somehow a mythical artifact of the Cherubs which probably explains it]].
* In ''Webcomic/{{Sinfest}}'', a comparison of swords [[http://www.sinfest.net/view.php?date=2006-08-27 includes one that cuts diamonds, and one that can cut paper dolls in mid-air.]]
%% Coyote's tooth in ''Webcomic/GunnerkriggCourt'' is not an example because it is a magical example of AbsurdCuttingPower.
* ''WebComic/DragonBallMultiverse'':
** Tidar's (from U19) [[BladeBelowTheShoulder God Blade]] which he used to effortlessly cut Uub's arm and the whole arena in a single swing. And that one pales in comparison with the Ultra armor used by his comrade Xeniloum; see UpToEleven
** Special mention should go to the Krillin vs. Salza battle, which seems set up [[UltimateShowdownOfUltimateDestiny answer the question of which ki-blade is sharper]]: Kienzan or the Salza Blade.
* ''Webcomic/TheDreamlandChronicles'' has the Sword of Kings, which has such demonstrations of cutting power as putting a 50-foot gash in a stone castle wall when used as a BladeBrake.
* ''Webcomic/SchlockMercenary'': Tailor's scissors are able to sever limbs and cut through body armour. Justified given that a) he was originally designed to use his tools to create body armour, and b) the Schlockiverse is the home of ''serious'' overengineering.
* Inverted in ''Webcomic/WhiteDarkLife''. While Matt's imitation blades do slice through things, they are designed to be incapable of actually cutting most targets. This is mainly due to the swords being mental projections combined with a user who is hemophobic.
* ''Webcomic/LeifAndThorn'': Heartswords seem able to go through just about anything (except other heartswords). Thorn goes [[http://leifandthorn.com/comic/homecoming-2024/ through a hellhound's neck in one stroke]].
* ''Webcomic/UhOhItsADinosaur'': Kyra's claws, which can slice and dice small neighborhood animals with ease.
* In ''[[CKarrus CKarrus]]'' Tombstone's sword is large enough to cut a large military grade vehicle in half.

[[folder:Web Original]]
* Black Knight in ''Roleplay/MarvelsRPG'' wields Excalibur, which is so insanely sharp that he can cut through anything... and then comes all of its magic abilities.
* ''WebVideo/{{Chapel}}'' manages to [[spoiler: decapitate Porter]] with a sword she bought...at Ren Faire.
* From the ''Roleplay/GlobalGuardiansPBEMUniverse:'' A Espada ("The Sword") is a Brazilian who can create a "sword" out of pure mental force that can cut through anything as long as he has confidence that it will. Pendragon, a British hero, wields the legendary sword Excalibur, and has yet to meet a substance it cannot hack through. Fey, a mystic swords man who claims to be from the elf-lands of Faerie, once used his sword to cut through a bank vault door, though he says it's all in the magic and not in the blade.
* The sword Kamimura uses to sever Oran's chip-implanted hand and therefore save him in the GrandFinale of ''WebAnimation/BrokenSaints''.
* The Literature/WhateleyUniverse stories have a few of these. The magical sword Destiny's Wave, wielded by [[TheChosenOne The Handmaid Of The Tao]] (a superheroine codenamed Bladedancer). In the hands of the rightful user, it can cut through anything (even unstoppable superhuman bricks), if the Tao requires it. At other times, it is as blunt and harmless as you'd expect of a blade made of white jade. And then there's Toni's mithril Kukri, Fey's scimitar Malachim's Feather, and Hank's PK shortswords.
* Dominic's sword in ''Roleplay/AtherCity''. Don't bother asking which one, because it seems to spontaneously apply to every sword he picks up.
* [[Wiki/SCPFoundation SCP]]
** [[http://www.scp-wiki.net/scp-585 585]] is a pencil sharpener which infinitely sharpens the points of graphite pencils. To the point of their being able to penetrate steel. And bedrock. And ''split atoms.''
** [[http://scp-wiki.net/scp-143 SCP-143]]'s ''petals'' can easily slice through flesh if mishandled.
* ''Literature/{{Worm}}'':
** Armsmaster, a [[GadgeteerGenius tinker]][=/=]martial artist superhero, developed a halberd with a [[{{Nanomachines}} nano-cloud]] blade that can turn anything to dust. He does more damage to [[{{Kaiju}} Leviathan]] with it than the rest of the heroes and villains put together.
** Flechette's superpower lets her imbue any objects she touches with the ability to cut through ''absolutely anything'', flat out breaking the laws the physics to do it. She mostly uses it with projectiles, though after [[spoiler:she pulls a HazyFeelTurn and changes her cape name to Foil,]] she starts using a rapier.
* In ''Phaeton'' atomic and subatomic blades sharpen to a subatomic level, these blades often have built in magic which keeps them blunting.
* In Literature/TheLastAngel:
** Baleblades have forcefield cutting edges that will tear through molecular bonds.
** [[SapientShip Nemesis]] uses a starship-scale version by charging up her WaveMotionGun and ramming a Compact Chariot with the tip of the barrel instead of firing. The hole in reality the weapon creates tears straight through 6 kilometers of warship.

[[folder:Western Animation]]
* ''WesternAnimation/SamuraiJack'':
** Jack's [[AncestralWeapon ancestral sword]] fits this bill very well. It can potentially cut through almost anything, but he has came across things that he simply wasn't strong enough to cut. It was a plot point at one time, when Jack had to destroy a series of robots Aku supercharged himself - the blade couldn't cut, because Jack wasn't strong enough, but when given a bionic arm by the creator of the robots (who was tricked into making said robots for Aku), he's able to decapitate them easily.
** There was also a rather entertaining episode in which he proved that the sword wasn't everything -- he took on an entire army of MechaMooks with a bamboo stick. And cut them in half with it. (When the pieces all merged together into one ''huge'' junk monster, he switched back to his sword.)
** The Scotsman's magical Claymore, being just as powerful as Jack's katana, averts the idea that KatanasAreJustBetter.
** [[MusicalAssassin Scaramouch]] [[RedBaron the Merciless]] from Episode XCII has his sinister scimitar sword that slices as cleanly as Jack's and the Scotsman's. While his scimitar is the death of him it's not his most lethal weapon, that would be his tuning dagger, which is not just sharp but can also obliterate anything by vibrating at a high frequency.
* Saluk from ''Disney/AladdinAndTheKingOfThieves'' has [[WolverineClaws brass knuckles with blades]]. He can use them to [[BladeBrake slice his way down a cliff]] -- and they don't get dull at all.
* ''WesternAnimation/AvatarTheLastAirbender''
** Sokka's "[[ThunderboltIron space sword]]". Its sharpness doesn't come up that often, but during the invasion, he cuts through a ballista in one swing. In the finale, [[spoiler:to stop fire benders, he throws the sword and even without any weight backing it up, it cleanly slices through a sturdy metal platform. Moments before that, it also works against him, when [[BladeBrake his attempt to stop a fall by stabbing the hull of the airship]] just results in the sword shearing through the metal until they reach the bottom and keep falling]].
** Much earlier in the series, in "[[Recap/AvatarTheLastAirbenderTheBlueSpirit The Blue Spirit]]," the titular masked spirit uses dual Dao sabres to cut right through the chains holding Aang captive. In a single stroke.
* In one episode of ''WesternAnimation/GIJoeARealAmericanHero'', Cobra swordsman Storm Shadow gets his hands on the original Excalibur, which among other things can cut right through an enormous stone pillar with one swipe.
* Sharko from ''WesternAnimation/ZigAndSharko'' has a dorsal fin capable of slicing through metal with ease.
* Related to this trope is the old cartoon gag of a blade being sharp enough to [[SplitHair split a hair]] neatly in two. A notable example is in the ''WesternAnimation/LooneyTunes'' short "WesternAnimation/AliBabaBunny", where Hassan's scimitar comes short of piercing WesternAnimation/DaffyDuck's skull but it does part a single hair (feather?) on the top of his head along with the hat that covered it.
* ''WesternAnimation/AdventureTime'':
** In "Slow Love", Jake and Finn's tree-house gets dragged around by a giant snail. At one point it cuts to the bedroom, showing Finn's sword falling over and completely slicing through his bed.
** Finn's [[CoolSword Root Sword]] cuts through a train's control panel when it's first introduced in "Mystery Train", and yet Jake is able to block it with [[WoodenKatanasAreEvenBetter a wooden sword]].
* [[PlayingWithATrope Played with]] in the ''WesternAnimation/ThunderCats2011'' episode "The Duelist and the Drifter" where several swordsmen in an AdventureTown {{invoke|dTrope}} this in the local sword competition, each bragging of their blade and striking a towering, giant boulder to see how deeply it cuts (one prideful PigMan sees his sword [[SubvertedTrope shatter on impact]].) Only young hero Lion-O makes good on his boast, as his Sword of Omens totally cleaves the boulder in two with a classic DiagonalCut, winning him a hefty purse.
* The Star Saber in ''WesternAnimation/TransformersPrime'' can cut through an entire mountain with little effort (as can its evil counterpart, the Dark Star Saber). Part of that is the large sheets of HardLight it shoots, rather than its actual cutting edges (not that it isn't Absurdly Sharp). It's also a mystical relic once wielded by one of the Thirteen, so it's ability to slice through things [[DoingInTheScientist isn't entirely based in science]]. The Dark Star Saber was created using one such relic and a large chunk of Dark Energon (which is basically the blood of the devil), giving it similar properties.
* In ''WesternAnimation/BatmanBeyond'', [[ProfessionalKiller Curare's]] weapon is a scimitar with an edge that has been sharpened with lasers to the thinness of a single molecule.
* In ''WesternAnimation/{{Futurama}}'', Zoidberg's lobster claws are shown as incredibly sharp and strong, able to win a fight against a robotic pair of clamps and capable of chopping off human limbs in a single snip.
* ''WesternAnimation/StarWarsRebels'' naturally has lightsabers, fictional blades made of suspended plasma (that can be switched on and off) that can cut through virtually any material.
* In ''WesternAnimation/GeneratorRex'', Rex's "[[{{BFS}} Big Fat Sword]]" is so absurdly sharp it can cut a school bus in half.
* ''WesternAnimation/KungFuPandaLegendsOfAwesomeness'': Fenghuang's talons can cut through ''an entire house'' at one sweep.
* ''WesternAnimation/TheLEGOMovie'' has the Sword of Exact Zero. A justified example, as it is an actual metal blade (an X-Acto Knife, to be exact) in a world where nearly everything is made from plastic.

[[folder:Real Life]]
* To prepare a slide for a transmission electron microscope, a diamond blade is used to get a less-than-paper-thin slice. Once properly sharpened, it's about a hundred atoms wide or so, and it will slide through your hand as easily as through the air.
* There is another type of blade used in microtomes to prepare samples for the electron microscope: Freshly broken glass. A fresh one is among the sharpest cutting instruments known to human science.
* Broken obsidian shards (as well as knapped knives, arrowheads, blades, etc.) are a small and measurable number of molecules in thickness. And while diamond is the harder material, obsidian can be made ''sharper''. The greatest of care should be used in handling obsidian knives and arrow points, etc. because they can remain absurdly sharp even centuries after being made and will cut you badly with even the slightest touch, as any knapper ''will'' be able to tell you. The drawback, of course, is that being basically an exotic form of glass ([[BlackSwordsAreBetter black glass]], to be exact), they wear out quickly in use.
** Fun fact, obsidian blades are still used in surgery when a clean, precise cut is needed. A top-quality obsidian blade has an edge measured in ''nanometers'' (that is, in billionths of a meter), several orders of magnitude smaller (and thus, sharper) than a similar-quality surgical steel blade.
* The Aztecs used obsidian blades embedded in a wooden club to make a deadly weapon known as the [[http://en.wikipedia.org/wiki/Macuahuitl Macuahuitl]]. The weapon was sharp enough to mutilate a man, and was apparently strong enough to decapitate a horse, if the journals kept by the Spanish were accurate. This worked well against the cotton armor of the people the Aztecs typically fought, however when the Spanish arrived with firearms and steel armor...let's just say [[CurbStompBattle it wasn't very hard to figure out which weapons fared better in the field]].
* Traditionally, the ''[[ButterflyKnife balisong]]'' was tested before it was sold. The vendor would take out a few one-peso coins and stab right through them with the blade. The blade would be completely undamaged, and the coins (and table) would have holes in them. [[DeceptivelySimpleDemonstration This worked only because the coin was nearly pure silver]], as opposed to the 925/1000 silver in jewels. Silver is very soft, Mohs hardness of about 2.5, and can be scratched by a human fingernail. Think modern electronics solder, with lead replaced by silver in the alloy, and even this is harder than pure silver.
* A similar tale is told of the original Bowie knives. Their maker supposedly tested them by whittling a piece of hickory for a couple of hours, after which the knives still had to be sharp enough to shave a man's arm without nicking him. This is less fanciful than it may appear. The original Bowie knife (made for Colonel Bowie himself) was forged from a large file. Files are made of extremely hard steel (so that they can be used on regular grades of steel), so as long as it was properly tempered the blade would hold an extreme edge through treatment like whittling.
* Some modern steels such as CPM-154 can be taken to this point by a user skilled at sharpening with fine grit stones or strops. Depending on the steel, this edge can last for a while before use dulls it down.
* Titanium blades with a carbide edge can be this if made well. The carbide creates a hard, almost ever-lasting sharpness. It should be noted that due to the tooth like nature of the edge, the blade will not shave hair, but will cut almost anything else once the blade is placed into motion, and behaves more like a very fine hacksaw than a knife or sword.
* Ceramic knives are starting to become all the rage in the kitchen for their ability to remain sharp for longer periods of time than metal knives. They are harder and aren't affected by chemicals and such that would dull them down. Their only problem is that they're rather brittle.
* The wings of the F-104 Starfighter were so thin and sharp, the plane came with protective covers to keep the ground crews safe. They were the worst kind of sword, though, since they really only hurt your friends.
* A very respectable example both for its age and the circumstances surrounding its discovery: the [[https://en.wikipedia.org/wiki/Sword_of_Goujian Sword of Gou Jian, King of Yue]] was discovered in a flooded tomb, clutched by a skeleton. When unsheathed, archaeologists discovered that inside the nearly airtight scabbard was a pristine 2500-year-old sword. Where other weapons have corroded to the point of near unrecognizability, the Sword of Gou Jian is not only recognizable as an antique work of art but is also remains a viable weapon. The researchers studying it found that it provided amazing control and sharpness for a weapon of that vintage, cleanly and effortlessly cut through a stack of papers 20 pages thick without losing the stroke (which would usually require decent leverage and a paper guillotine).