History Main / EvilWeapon

* ''ComicBook/TheWarlordDC'': Machiste found an ancient cursed axe containing a demonic entity which took possession of his mind. The demon's will prevented Machiste from letting go of the axe. Seeing that the axe's influence was making Machiste more and more tyrannical as well as violent, Travis was forced to [[LiteralDisarming remove his friend's right hand]], thus severing the axe's spell.

* ''Film/AquamanAndTheLostKingdom'': The Black Trident is a counterpart of the Trident of Atlan forged from dark magic. Anyone who holds it gains enhanced strength and powers, but gets possessed by its true master, Kordax.

*** The [[spoiler: Weapons of Light -- at least those in the regular Slayers universe and not the sentient starships of the Anime/LostUniverse alternate universe]] are a bit of a subversion, however, in that they don't seem to possess any sort of will of their own, nor do they influence their users in any way, excepting possibly giving them an opportunity to go [[WithGreatPowerComesGreatInsanity mad with power]]. In fact, [[spoiler: they were used as intergral components of the spell to destroy their creator, with no resistance or side effects on their part.]]

* On ''Series/{{Supernatural}}'', the First Blade and the Mark of Cain influence their bearer to think that MurderIsTheBestSolution. The current bearer is Dean Winchester. That situation is going about as well as can be expected.
* Showed up in "The Encounter" episode of ''Series/TheTwilightZone1959''. It's heavily implied to be a Muramasa blade.

* In ''Roleplay/TheGamersAlliance'', the Sword of Darkness grants its wielder immense power but also actively corrupts him or her into becoming a dark knight. Once the sword is drawn, it can't be sheathed until it has tasted blood.
* Perhaps inevitably, the Literature/WhateleyUniverse has one definite, and one possible:
** The cursed longsword [[SealedEvilInACan Imalris]] from ''Ill Winds'' definitely qualifies. Just summoning it devours the soul of the summoner.

* ''WesternAnimation/ScoobyDooAndTheSamuraiSword'' featured a katana called the Sword of Doom which was created by a dark forger, and thus, imbued with his evil ambitions. Upon unsheathing it, a samurai was cursed and became known as the Black Samurai. Fortunately, when Franchise/ScoobyDoo [[SugarWiki/MomentOfAwesome battled the samurai and destroyed the sword]] using the Sword of Fate, the Sword of Doom's opposite, the samurai was freed from his curse and his spirit was able to rest in peace.
* Rubilax from ''WesternAnimation/{{Wakfu}}'' is a [[SealedEvilInACan Sealed Demon in a Sword]] whose greatest desire is for absolute carnage and happens to be able to [[DemonicPossession possess people]]. Near the end of Season 1, he manages to break free from the sword and fights Sadlygrove, and seals himself back in the weapon upon his defeat.
* Mumm-Ra's Sword of Plundarr from ''WesternAnimation/ThunderCats2011'' is outright said by Lion-O to be evil, and we find out that [[spoiler:it was created through the destruction of a solar system by collapsing its star, meaning it's powered by the deaths of billions of lives lost. Interestingly, while the Sword of Omens was forged from the same metal, it is not considered evil, presumably because it was only made from fragments leftover, and was not imbued with the spell that the Ancient Spirits seemed to cast on the Sword of Plundarr.]]

* ''Franchise/FireEmblem'':
** The series as a whole has a couple of examples:
*** The Devil weapons, which are incredibly powerful, but can randomly make you take damage instead of your opponent.
*** The Wo Dao is described as a wicked blade that feeds off of slaughter and bloodshed. As a result, throughout the series its wielders have been {{Blood Knight}}s at best, and deranged psychopaths at worst.
** In ''VideoGame/FireEmblemGenealogyOfTheHolyWar'', you have the Loptous tome, which corrupted its wielder Julius from a kind and sickly young man into TheAntichrist as soon as Manfroy put it in his hands.
** In ''VideoGame/FireEmblemThracia776'', there's the Shadow Sword that turns Mareeta into a BrainwashedAndCrazy swordmaster. Later, [[spoiler: Saias purifies the weapon in order to allow her to wield it without any drawbacks.]]
** In ''VideoGame/FireEmblemTheBlazingBlade'', anyone who takes up the golden axe Armads is cursed to inevitably die in battle.
** ''VideoGame/FireEmblemTheSacredStones'' has the Cursed Lance, a weapon in the possession of General Duessel of Grado. According to him, Valter wielded it in battle after his own lance broke, and it turned him from a simple {{Jerkass}} to an AxCrazy monster. It makes its playable debut in ''VideoGame/FireEmblemHeroes''.
** ''VideoGame/FireEmblemFates: Conquest'' has the final boss' weapon, Skadi. It is described as evil in ''Heroes'', and it is heavily implied to be a corrupted form of [[spoiler:Takumi's Fujin Yumi due to the very distinct physical similarities between the two bows]].
** The Heroes' Relics from ''VideoGame/FireEmblemThreeHouses'' appear bonelike, have a pulsating orb in the centre & constantly twitch & move on their own. [[BodyHorror They also turn those without crests]] [[WasOnceAMan into demonic beasts]] as seen early on in the game with the Lance of Ruin. [[spoiler: Late in the Verdant Wind route, it's revealed that the Heroes' Relics weren't [[LegendaryWeapon gifts from the goddess]], but weapons made utilising forbidden [[AbusivePrecursors Agarthan]] technology & made from [[PoweredByAForsakenChild the bones & hearts of the Children of the Goddess]].]]
* ''VideoGame/FlashOfTheBlade'' have it's BigBad, a sentient, evil sword called the Soulstealer, a cursed blade possessed by maleovalent darkness forged in hell who unleashed TheHorde on humanity. It's former user have to commit {{Seppuku}} after realizing how evil the weapon is, only for Soulstealer to revive it's ex-owner's corpse into battle. Somehow.
* ''VideoGame/DragonFable'' has the {{Doom|yDoomsOfDoom}} Weapons, which ostensibly exert a corrupting influence over their owners, although this has yet to manifest in any obvious way. It also features the Necrotic Blade of Doom, a much more straight-forward example complete with EvilLaugh, [[LargeHam massive hamishness]], a position on the OmniscientCouncilOfVagueness and [[TheManBehindTheMan obviously being the boss of the]] BigBad. You can either wield them as-is, or you can have Artix purify them to turn them into Destiny Weapons.
** In ''VideoGame/AdventureQuest'', the E'''b'''il Scythes [''sic''] count, as two of them require payment in the form of [[CastFromHitPoints HP]] or money to perform their special attacks, another corrupts the enemy, and the last one... [[ArsonMurderAndJaywalking heals you]].
* The [[VideoGame/Shinobi2002 PS2 remake]] of ''VideoGame/{{Shinobi}}'' has the main character wielding Akujiki, a cursed soul-eating sword that if not repeatedly fed, will begin to eat the wielder (in this case, main character Hotsuma)'s own soul.
** The bonus character's non-named sword also consumes the soul of his host, though it eats through its reserves rather fast, meaning you get much less leeway on platforming between combat segments before you start losing health.
* [[http://demonssouls.wikidot.com/makoto Magic sword "Makoto"]] from ''VideoGame/DemonsSouls'' is in fact one of these, draining life from the user each second it's equipped. You can also turn any normal weapon into a ''Curse Weapon'' using a spell with that very same name.
* The cursed blade Yugiri in ''VideoGame/BushidoBlade'' corrupts whoever holds it. It's done this for a ''long'' time.
* ''VideoGame/DeathtrapDungeon'' has a cursed Black Sword which deals extra damage of enemies - but ''also'' drains the health of the user.
* ''Franchise/DragonAge'':
** In the epilogue of ''VideoGame/DragonAgeOriginsAwakening'', it's heavily implied that [[spoiler: [[InfinityPlusOneSword Vigilance]] becomes one of these. Of course, it was forged with the bone of an ancient evil dragon (whose ghost you had to fight to get the bone) that lived in a swamp that bridged the gap between the physical world and the spiritual one. It would have been a surprise if the thing didn't turn evil.]]
** ''VideoGame/DragonAgeII'': Near the end of the first act, an ArtifactOfDoom gets onto the market. Later, [[spoiler: it is used to smith an Evil Sword, and makes Meredith, who was already a KnightTemplar, turn outright evil and crazy (and [[RedEyesTakeWarning make her eyes glow red]]). She eventually tries to use it to become a OneWingedAngel, but that backfires, [[TakenForGranite turning her and the sword to stone]]. Before that, it allowed her to use magic, including [[SuddenlyHarmfulHarmlessObject animating statues]] to [[MalevolentArchitecture fight for her.]]]]
** ''VideoGame/DragonAgeInquisition'' - should you side with the mages, [[spoiler: Samson]], General of the Red Templars, wields what is implied to be [[spoiler: the red lyrium sword somehow recreated. You can actually add it your inventory after beating him. The same game also reveals what exactly makes the sword evil; the sword is made of lyrium, which only turns red when it has been infected with [[TheCorruption the Blight]].]]
* Enserric in ''VideoGame/NeverwinterNights: Hordes of the Underdark'' is a vampiric weapon named after the wizard it killed. The wizard's soul became trapped in the blade and the weapon became sentient. Enserric will encourage you to wield it against as many foes as possible, though it will complain if it doesn't like the "taste" of certain foes (it doesn't like being used against undead, for example). You can also channel a fraction of your own lifeforce into the blade to make it more powerful.
* Magic Sword Maxwell, later more appropriately referred to as Demon Sword Maxwell, qualifies as this in ''[[VideoGame/DotHackGU .hack//G.U. Redemption]]''. Infected with a [[AIIsACrapshoot particularly nasty AIDA]], the sword puts anyone it "kills" into a coma in the real world and constantly demands to be "fed", but in return makes the wielder (hint: not you) practically invincible. Oh, and breaking the sword just frees the AIDA to [[NiceJobBreakingItHero infect Haseo.]]
* ''VideoGame/{{Strife}}'' featured The Sigil. Made by an evil god to corrupt the world, worshipped by its EvilEmpire {{Cult}}, and burns the user's life force to power it.
* The Kris of Ashrah in ''VideoGame/MortalKombatDeception'', which ''[[VideoGame/MortalKombatArmageddon Armageddon]]'' later explained is a [[EmpathicWeapon sentient sword]] who fills its user with illusions of being purified as a way to make him/her slay his hatred enemies, those of the Vampire race.
* ''VideoGame/{{Tekken}}'' has Yoshimitsu's katana, [[LegacyCharacter likely the same one from Soul Calibur]], which in ''Tekken 6'' is revealed to drive its wielder crazy if it doesn't taste blood regularly.
* Desire in ''VisualNovel/AseliaTheEternalTheSpiritOfEternitySword'' tries to force Yuuto to bend to its will through pain. What it wants is for Yuuto to rape, pillage and murder. [[spoiler:Near the end it's revealed that it couldn't really help being like this because it was undergoing the equivalent of prolonged starvation. It also has a little bit of a soft spot.]]
* The Chaos Sword in ''VideoGame/UltimaV'' is arguably the most powerful weapon in the game, capable of killing virtually anything in a single hit. Also, using it in combat causes you to lose control of the character wielding it and cause him/her to attack fellow party members as well.
* The header description from ''VideoGame/KingdomOfLoathing'' doesn't mention how the Spirit Precipice takes its toll. On a critical hit:
--> '''A bolt of evil energy arcs out of Spirit Precipice and hits you in the [body part].'''
--> '''You lose 12-24 hit points.'''
** [[ShareTheMalePain *wince*]] This can include a GroinAttack...now that's ''evil''.
*** It also [[BlessedWithSuck quintuples]] your chances of getting a Critical Hit
** Also in ''Kingdom of Loathing'', many weapons that do Spooky damage. Several are made from human remains.
* The quest "ANIMUSLAVER!" in ''VideoGame/TheSims Medieval'' involves dealing with the titular sword. You eventually learn it's possessed by a demon that has already cleared out entire ''kingdoms'' of people through its wielders. Depending on the approach, you either guide a Knight and Spy in uncovering and ultimately destroying the blade (though the Knight becomes temporarily possessed by it), or letting a Jacoban Priest and a Blacksmith leverage the blade's evil for the good of the Jacoban Church.
* Zulwarn from ''VideoGame/VanguardBandits'' is a ''HumongousMecha'' example. It is one of the most powerful ancient ATAC mecha, one with the power to MindControl foes. Zulwarn also has a corrupting influence on anyone who is crazy enough to pilot it, though it's not so obvious when the pilot is ''already'' evil. And unlike other ATAC mecha, Zulwarn doesn't rely on a powerstone -- it is fueled by ''human blood''.
* The Orchid Malevolence from ''VideoGame/OtogiMythOfDemons'' is a crimson bladed sword covered in purple flames that can kill anything in one hit. The catch? It saps all of your health while it is held, turning you into a OneHitPointWonder.
* The Muramasa legend above is brought back in the series ''VideoGame/MuramasaTheDemonBlade'', where [[Mystical108 108]] swords are bound to Muramasa's spirit, and he is unable to pass on until they've all been crafted. The swords have various curses upon them in exchange for their power, as they [[GameplayAndStorySegregation cannot be put away until they've killed something]], and corrupt the minds of unworthy or undisciplined individuals, culminating in the Kuzuryu sword [[spoiler: corrupting and possessing the mind of the shogun, Tokugawa Tsunayoshi, with a dog demon trapped within]].
* ''Franchise/TheElderScrolls'': While the BlueAndOrangeMorality of the [[OurGodsAreDifferent Daedric Princes]] tends to put them AboveGoodAndEvil, ''you'' will need to do some fairly evil things in order to obtain and/or power up some of their [[LegendaryWEapon associated artifacts]]. A few examples:
** In general, any artifacts associated with the more [[JerkassGods outright malevolent]] Daedric Princes may be considered this. For instance, the Mace of Molag Bal and Mehrune's Razor aren't inherently evil on their own, but having to complete tasks for [[TheCorrupter Molag Bal]] and [[DestroyerDeity Mehrunes Dagon]] typically means that you'll be doing ''something'' evil in order to acquire them.
** ''[[VideoGame/TheElderScrollsIIIMorrowind Morrowind]]'' and ''[[VideoGame/TheElderScrollsIVOblivion Oblivion]]'' have Umbra, a powerful [[YourSoulIsMine soul-stealing]] sword created by a witch for [[DealWithTheDevil Clavicus Vile]]. It tends to take over the mind of its wielder, turning them into insane {{Blood Knight}}s. In ''Oblivion'', Barbas (Vile's [[LiteralSplitPersonalities external conscience]] and MoralityChain) begs you not to deliver the sword to Clavicus Vile, since he believes even a Daedric Prince won't be able to control the blade's evil power. [[spoiler:He's right]].
** ''[[VideoGame/TheElderScrollsVSkyrim Skyrim]]'' has [[ManipulativeBastard Mephala]]'s Ebony Blade, which becomes stronger every time its wielder ''kills a friend or loved one with it.'' You need to kill ''ten trusted companions'' to fully empower the Ebony Blade.
* ''Franchise/TheLegendOfZelda'':
** In ''VideoGame/TheLegendOfZeldaFourSwordsAdventures'', the Trident wielded by Ganon is a demonic weapon that marks its holder as the King of Darkness. It was stealing the Trident from the Gerudo's sacred pyramid that transformed [[{{Reincarnation}} this incarnation]] of Ganondorf into the monstrous Ganon.
** ''VideoGame/TheLegendOfZeldaSkywardSword'' has [[spoiler:the sword of the Demon King Demise. It can take on the form of a white-haired man called Ghirahim, who has an AxCrazy BloodKnight personality.]]
* Stormbringer from ''VideoGame/NetHack'' is a "bloodthirsty" sword. Normally, when you want to move onto a pet or peaceful monster, you don't attack it (you get confirmation for attack for peaceful monsters, and displace (swap places with) pets). While wielding Stormbringer, you attack those without confirmation.
* ''VideoGame/TheDarknessII'' introduces the sword Kusanagi to the series, which used to be benevolent, until an evil shogun used it to take thousands of innocent lives, corrupting it. In order to purify it, it has to be fed the hearts of (via impalement) ten thousand evil souls, or else it reduces the lifespan of the current wielder by a year each day. Luckily for the sword, its current wielder is the revenge crazy BloodKnight Inugami, who's hunting down murderous cultists.
* A few of the hexed items in ''VideoGame/{{Arcanum}}'' qualify, but the Bangellian Scourge stands out due to having the most fleshed-out backstory. Children and virgins were burnt alive to fuel the forge that created it. Notable people who wielded it in the past include Lorek (despised by the dwarves as a traitor for starting a civil war), Bane of Kree (barbarian warlord who used it to massacre civilians ForTheEvulz) and Stringy Pete (pirate king who claims he was manipulated, by the blade itself, into using the Scourge to slit the throats of his crew while they slept).
* ''VideoGame/{{Darksiders}}'':
** The novel ''The Abomination Vault'' has the Grand Abominations. The Nephilim crafted them from the remains of the Ravaiim, the first race that the Nephilim slaughtered during their rampage across creation. The semi-sentient Abominations possess world-ending power and a deep hatred for everything. They were deemed so dangerous that the Nephilim sealed their full power and locked them away in the eponymous Vault.
** ''II'' introduces "Possessed" Weapons, which [[MagikarpPower start out weak but grow more powerful]] by being "fed" other items in Death's inventory, leveling up in power and, depending on what items were fed, can stack multiple different effects. Unlike most, these don't actually endanger Death in being used.
* The ''VideoGame/DwarfFortress'' known as "LetsPlay/{{Deathgate}}" forged the Red Monster Sword. While not intrinsically evil, it ''was'' made from the arm of a fire demon and burned with everlasting {{hellfire}}, so hot that even going near it caused third-degree burns. No one could wield it. At great cost it was sealed in stone.
* ''VideoGame/{{Gothic}}'' has the claw of Beliar, a weapon which levels up with you, but requires some of your health each time to do so... you have to sacrifice your health to Beliar, the most evil of the three gods in the game. Additionally to the normal damage, it has a certain chance that an enemy will be killed instantly by Beliar's intervention. When you receive the weapon, you have the option to throw it into the sea because it is evil.
* ''VideoGame/MitsurugiKamuiHikae'' has the Demon Blade, a demonic katana that is said to steal the life-force of its wielder and drains them of their blood.
* ''VideoGame/ShantaeAndThePiratesCurse'': The Pirate Master's weapons are revealed to be cursed and their evil will completely consume their wielder eventually. [[spoiler:However, their curse could be broken if the Pirate Master is destroyed]].
* ''VideoGame/{{Guenevere}}'': Meligaunt wields a giant, evil-looking claymore that [[PoisonedWeapons poisons those wounded by it]] and can be used to fuel dark magic.
* Gallows Dodger in ''VideoGame/SaintsRowGatOutOfHell'' is a sentient pistol shaped like a demon's skull, and is one the [[SevenDeadlySins Seven Deadly Weapons]], representing the sin of Pride. When you first find it, it gets upset at being called "a gun", claiming that it's like calling Jesus "a guy who wore sandals", and claims that it gets antsy when it hasn't killed for a while. When used during combat, it will compliment you on your killing prowess and make dismissive taunts at your enemies, and if used to inflict enough damage in a short period of time, it will enter "Overkill Mode", temporarily granting an increased rate of fire and explosive shots.
* In ''VideoGame/LeagueOfLegends'', the Darkin weapons are a series of weapons that corrupt the wielder, eventually taking them over. The champion Aatrox is actually the name of the sword wielded by a nameless gargantuan. Varus is hinted at wielding a Darkin Bow, but not being corrupted - possibly its a symbiotic relationship between the bow's bloodlust and the champions' desire for revenge. The whole schtick of the champion Kayn is he begins each game wielding the corrupting scythe Rhaast, and either succumbs to it or dominates it through the course of each match. Rhaast form is a tanky bruiser, while Shadow Assassin Form is basically ExactlyWhatItSaysOnTheTin.
* Quite a few weapons used by or based off of the Hive in ''VideoGame/{{Destiny}}'' are this given the Hive's casual relationship with things like death and the soul.
** The Sword of Crota was capable of draining the Light of Guardians it killed, resulting in their permanent end.
** Ir Anûk and Ir Halak once wielded a sniper rifle that didn't kill but [[FateWorseThanDeath altered the targets existence into one of never ending torment.]]
** The Touch of Mailce [[spoiler: holds a piece of Oryx's soul and will eventually warp its wielder into him]].
** The Bad Juju gains power as it kills anything.
** The HandCannon Thorn drains the Light of its victims. Its weilder, Dredgen Yor, had been corrupted by the Hive and killed for pleasure.
*** In ''Destiny 2'', Thorn makes its return. [[spoiler: But [[PlayerCharacter The Guardian]] is able to purge it of its corruption back into its original configuration, Rose, and then imbues it with Light, turning a Weapon of Sorrow into a [[InvertedTrope Weapon of Hope]] that can [[HealingShiv heal fellow Guardians]].]]
* ''VideoGame/{{Warframe}}'': The [[{{BFS}} greatsword]] War is actually the last piece of the massive Sentient battleship, Hunhow. Despite being reduced to a state where he can't even move on his own, he is still fully intelligent, able to talk the Stalker over to his cause, and nearly destroys the Tenno. You can get a blueprint for War, [[GameplayAndStorySegregation but it acts exactly the same as any other greatsword when you use it]], because it broke in half and was then repaired.
* ''VideoGame/SaltAndSanctuary'' has two of these.
** The first is the Black Widow, part of the royal regalia of Liven. It was once wielded by the Kingdom's founder, Gandra the Warrior, and handed down through generations of her successors until finally reaching the hands of Queen Lenaia. The description of the item heavily implies that Lenaia's [[GodSaveUsFromTheQueen tyranny]] and [[TheCaligula insanity]] were caused by the sword's influence.
--->''The rivers of blood spilled by this cursed sword over the ages are said to have swallowed its prior owners, all of whom descended into violent madness after falling under its influence.''
** The second is the Coveted, a strangely sharp executioner's axe made of solid diorite. According to legend, a royal executioner named Erland received it as a mysterious gift and immediately took a liking to it. Power in the kingdom shifted, and before long, the executioner had used his axe on the entire royal family. Power shifted further, and the executioner became king. But the executioner never resigned from his grisly station, and the axe was well fed, though never satisfied. Erland would later die alongside [[OffingTheOffspring his]] [[SelfMadeOrphan son]] in a struggle over the axe. Their ghosts are now bound to the weapon, enslaved to their unending desire to possess the axe.
* ''VideoGame/DragonQuest'':
** ''VideoGame/DragonQuestI'' has the Cursed Sword. One of the best weapons in the game, but it curses the Hero if equipped.
** ''VideoGame/DragonQuestII'' has the Sword of Destruction/Demon Sword. Really high attack, but curses the user. There's also other "Evil Gear" in armor.
** ''VideoGame/DragonQuestVIII'': The staff that Dhoulmagus stole allows Rhapthorne to possess the wielder.
** In ''VideoGame/DragonQuestIX'', Excalipurr is "...wielder of a bewitched blade that can only be used by those it chooses."
* ''VideoGame/NuclearThrone'': Cursed Weapons have a small chance of spawning inside purple chests in every level. These weapons may be more advanced than what is possible for the given level it spawned in, but like cursed items in other roguelikes, [[StuckItems they cannot be replaced]] except with other Cursed Weapons[[note]]and neither can they be used as throwing weapons by Chicken, for that matter[[/note]]. Carrying two of them at once may cause enemies to drop purple-colored Cursed Mini Ammo Chests which give more ammunition on pickup than regular Ammo items, but will explode if left alone, possibly killing players who take too long to retrieve them. [[spoiler:Finally, loading screen tips suddenly begin turning into distorted messages which imply that the Cursed Weapons [[LivingWeapon are alive]] [[TheFourthWallWillNotProtectYou and can see the player]].]] Retrieving a crown from the Crown Vault, choosing the Last Wish mutation, or looping the game will cleanse the weapon. [[note]]As an aside, [[SchmuckBait eating them as Robot is a real bad idea]].[[/note]]

* ''Literature/TheDeathGateCycle'' has [[NamesToRunAwayFromReallyFast the Cursed Blade]]. It's a MorphWeapon that can turn into any weapon necessary to defeat a threat facing its wielder (or [[SummonBiggerFish summon something that can if the threat is more powerful than the blade]]) though its true form is a rather crude-looking dagger. Unfortunately, it also has a rudimentary intelligence that doesn't usually have thoughts more complex than "kill the threat", and once it gets going, it sees ''everyone'' as a threat[[note]] the Blade is introduced with a charming little story about how a past wielder used it to spar with his brother - except the Blade can't tell the difference between sparring and actual combat, and the predictable happened[[/note]]. Even the wielder has only limited control over it, winding up as little more than a means of transport for the Blade. Worst of all? It's the only one that exists in the present time, but at one point the Sartan ''mass produced'' these things before handing them off to unsuspecting [[{{Muggles}} mensch]] allies.

* The Guns of ''Literature/TheHalfMadeWorld'' are [[ExactlyWhatItSaysOnTheTin guns]] housing demonic spirits bent on spreading chaos and senseless violence throughout the West. Being selected to bear one as an [[TheGunslinger Agent]] gives you superpowers like [[SuperSpeed super speed]], [[HealingFactor rapid healing]], and [[ImprobableAimingSkills never missing a shot]], but you'll also be bound to its will for the rest of your (probably short) life.
* In ''Literature/LightThickens'' by Creator/NgaioMarsh, this trope is played with. [[spoiler:The deranged and wildly imaginative fight master believes his claymore to be associated with decapitation and to possess a supernatural power, and allows this to take control of him.]]
* [[MusicalAssassin Mo]]'s "Zahn Special" white violin in ''Literature/TheLaundryFiles'' by Charles Stross. Despite its [[PoweredByAForsakenChild horrific]] [[HumanResources manufacture]] and [[BrownNote gruesome effects]], the main characters believe that it can still be used for a good cause. [[spoiler:It can, but only until the evil sentience inside it gets strong enough to start trying to take action on its own.]]
* ''Literature/VillainsByNecessity'': Inverted; Finwick wields a holy blade called Truelight that exists to cut down evil. [[spoiler: Sam actually uses this weapon to cut off Mizzamir's head, reasoning that however truthful or holy you make a sword, it's always going to be a weapon made to kill.]]
* Present in the animistic universe of [[Literature/{{Okuyyuki}} "Okuyyuki"]]. According to [[TalkingWeapon Audrey]], the spirit of a weapon takes on some of the character of its wielder(s). Thus, while American tanks are immature and gung-ho but otherwise rather nice, the Iraqi tanks Reilly faces are evil, with thoughts filled mostly with [[SissyVillain "bribes and buggery"]] and such things.
* The Xin Mo sword in ''Literature/TheScumVillainsSelfSavingSystemRenZhaFanpaiZijiuXitong'' is extremely powerful, but mind corrupting and constantly fighting against its wielder. Having had hundreds of owners over the years, all of them eventually died to it, unable to suppress its evil nature, at least until it falls into the hands of ''Proud Immortal Demon Way's'' overpowered protagonist Luo Binghe. But even he has trouble with it. [[spoiler:Shen Qingqiu ends up sacrificing himself ''twice'' to keep him from completely losing control. After the second time, Luo Binghe ends up destroying it.]]
* ''Literature/TolkiensLegendarium'':
** Anglachel/Gurthang from Tolkien's ''Literature/TheSilmarillion'', described by Melian thus: "There is malice in this sword. The dark heart of the smith still dwells in it. It will not love the hand it serves, neither will it abide with you long." It sang in joy as it killed, and it may be responsible for the death of its third owner, Beleg (the intentions and will of the sword in that matter are left ambiguous), although when Turin asked it to take his life after discovering he had [[SurpriseIncest unwittingly married his sister]], the sword [[TalkingWeapon agreed to drink his blood swiftly]] because it was pissed off that Turin had used it both in Beleg's AccidentalMurder and an intentional but completely unjustified one later.
** ''Literature/LordOfTheRings'' is about TheQuest to destroy the One Ring, which is an altogether evil device that contains not only much of Sauron's power, but his cruelty, malice, and desire to conquer all living things. Gandalf and Galadriel, both contenders for the position of BigGood, are terrified of using it themselves--they know that their good intentions would inevitably be twisted so that they would become nothing more than a different kind of dark ruler. The Ring actively works to corrupt anyone holding it or anyone nearby and works really hard on Boromir, who can only understand it as a sword that could be turned against its master, until he falls--fortunately he snaps out of it and realizes at last why it absolutely cannot be used.
* ''Literature/TheAsteriskWar'': Gravisheath, the Orga Lux used by Irene Urzaiz, or rather [[RussianReversal that uses Irene Urzaiz]]. A SinisterScythe with energy-intensive GravityMaster powers, it transforms her into a vampire-like state to power itself (by draining mana in the form of blood from her beloved sister Priscilla) and overrides her normal nice (if uncouth and temperamental) personality with a BloodKnight one. [[spoiler:Irene and Priscilla actually ''thank'' Ayato for destroying it in their match at the end of volume 3.]]
* The Legendary Weapons of the Four Heroes in ''Literature/TheRisingOfTheShieldHero'' have the potential to become evil through the Curse Series. If conditions are met, the Weapon can unlock a cursed form based on the SevenDeadlySins and further corrupt its wielder with that sin. Naofumi unlocks the [[UnstoppableRage Wrath Curse]] which becomes his SuperpoweredEvilSide.

* Showed up in "The Encounter" episode of ''Series/TheTwilightZone1959''. It's heavily implied to be a Muramasa blade.

* ''Series/VRTroopers'' had the Millennium Saber. Fortunately, it only activates once every thousand years, hence the name. The rest of the time, it's old and rusty.

* ''Series/TheOuterLimits1995'': The episode "[[Recap/TheOuterLimits1995S6E2TheGun The Gun]]" has a gun that fuses to its holder's hand and causes him to become filled with murderous bloodlust. It was sent by aliens to test how HumansAreWarriors and see if they will be valuable allies in an interstellar war. The aliens are disappointed when one man uses ThePowerOfLove for his daughter and grandson to break free and let go of the gun, but decide to just send more guns to different people.
* Subverted in "[[Recap/DoctorWho50thASTheDayOfTheDoctor The Day of the Doctor]]", the 50th Anniversary episode of ''Series/DoctorWho''. Previously, the Moment (the weapon the Doctor used to destroy both the Daleks and the Time Lords) was referred to as a fearsome device that no one in their right mind would ever use. However, in this story, we discover that it actually has a conscience. Further, it tries to convince the War Doctor not to use it [[spoiler: and is clearly happy when he, and Doctors Ten & Eleven, come up with an alternate solution]].

* ''Series/KamenRiderSaber'' has a zig-zag in the form of the ''Ankouken Kurayami'', a sword of darkness created in tandem with the Sword of Light Saikou. The ''Kurayami'' serves as an "anti-sword" that can seal away the powers of the other Seiken swords as well as [[spoiler: seal people away and absorb souls]]. The weapon itself is not directly evil but it gives its wielders precognition, which the season makes very clear is a bad thing. The ''Kurayami'' has generally found itself in the hands of [[spoiler: [[PragmaticHero well-meaning people]] who are [[MindRape subjected to so many visions]] of a BadFuture as the result of [[TheConspiracy the dark truth behind the organization they serve]] that it [[IncitingIncident cripples their trust issues]] and [[PoorCommunicationKills turns them on their friends as they try to seal the other Seikens to change the future]]]].
** A more straightforward example is the ''Mumeiken Kyomu,'' a [[PowerOfTheVoid sword of nothingness]] that's essentially a side-Seiken. The ''Kyomu'' has found itself in the hands of AxCrazy users that [[OmnicidalManiac seek to destroy everything]] ([[RoaringRampageOfRevenge or everyone]]). ''Film/KamenRiderSaberTrioOfDeepSin'' indicates it has a will of its own, the blade ([[spoiler: impaling Yuina when she hesitates to kill Kento per her contract]] and may have [[GreaterScopeVillain kicked off the events of the movie]] by purposefully making itself available to [[spoiler: the past self of]] the film's ManBehindTheMan; only stopped via said man's HeelRealization.

* Podcast/DiceFunk: The "strange dagger" Anne finds in the underground lair is actually [[spoiler:cursed with vampirism so powerful as to be immune to the Dispel Magic spell.]]

* It is rumored the Ba'al Verzi daggers in the ''TabletopGame/{{Ravenloft}}'' setting cannot be sheathed before having killed someone, and furthermore cannot be sheathed in a scabbard made of anything other than humanoid flesh.

* The glaive known as the Whisperer of Souls in an example in ''TabletopGame/{{Pathfinder}}'' mythology. It is the weapon of the LoveGoddess Shelyn and is an inherently evil weapon that delights in drinking souls. Once the glaive eats 100 powerful souls, it will supposedly [[DeityOfHumanOrigin become a god]] and create an era of strife and death. Luckily, Shelyn has been freeing the souls trapped in the glaive with a combination of heroic deeds and IncorruptiblePurePureness, keeping the evil weapon in check.
* Orgoth Fellblades in {{TabletopGame/Iron Kingdoms}} turn anyone who picks them up into ax crazy murder machines, while greatly increasing their strength. The Empire of Khador leverages this by forcibly chaining them to men and turning them into berserk Doom Reavers to be used against their enemies.

* The Soul Edge from the ''VideoGame/SoulSeries''. The Soul Calibur was an attempt by the former wielder (at the time) of the Soul Edge to create the exact opposite of the 'Sword of Destruction', that is, a Sword of Order. However, it apparently just winds up in the [[UnholyHolySword other extreme]], in that the Soul Calibur wants nothing more than to freeze the entire world in crystalline perfection... where there will be no war, no death, no destruction... because nobody will be able to move. Which is interesting, because Soul Edge was a regular sword corrupted by countless kills on the battlefield, while [[DidntThinkThisThrough Soul Calibur was forged from a piece of Soul Edge]].
** There are other lesser weapons in the Soul Series who are quite evil; Taki's Mekkimaru and Yoshimitsu's self-named sword are both evil swords with inmense evil power and destructive abilities. In Mekkimaru's case, it has even driven Taki's master insane by the time of the first Soul Calibur.
* ''VideoGame/{{Warcraft}}'':
** Frostmourne of ''Warcraft III'' is one of these. It even corrupts the wielder (not that the wielder wasn't asking for it), and hungers for souls. It can drain the victim's soul to strengthen the wielder or to be later reanimated. There's even a warning inscribed on the dais where Arthas finds it:
--->''Whomsoever takes up this blade shall wield power eternal. [[PowerAtAPrice Just as the blade rends flesh, so must power scar the spirit]].''
** In fact, all death knight runeblades are sentient to a degree, and share a bond with their owner. Because the runes put on it each contain part of the wielder's soul.
** Another example from ''Warcraft'' is Atiesh, greatstaff of Medivh, the last Guardian. When Medivh got possessed by Sargeras, the creator of [[LegionsOfHell the Burning Legion]], he sealed a powerful demon inside his staff, turning it into an evil weapon with terrifying magic powers. The staff was later shattered to prevent it from falling into evil hands, but in the Level 60 version of Naxxramas, players can acquire its pieces to remake it and then banish the demon, making it wieldable.
** Yet another example is the corrupted Ashbringer, also from the Level 60 version of Naxramas. Ashbringer was/is the exact opposite of this trope, being a sword made specifically to destroy any unholy beings, but after its wielder got murdered by his son, it became corrupted. Players who wield the corrupted Ashbringer (prior to it being removed from the game) will occasionally hear the sword whisper to them in a creepy voice. In the ''Wrath of the Lich King'' expansion the sword is cleansed and is now wielded by Highlord Tirion Fordring, the leader of the Argent Crusade. [[spoiler: It even shattered Frostmourne at the end]].
** More examples include several of the Artifact Weapons introduced in Legion, such as Apocalypse, a murderous greatsword that Unholy-spec Death Knights get, the cursed Dreadblades that Outlaw Rogues end up with, and literally all of the Warlock's possible Artifact Weapons. Shadow Priests even get a talking Old-God-related dagger with a [[ArousedByTheirVoice disconcertingly attractive]] [[HearingVoices voice]]. Oddly enough, the Frost Death Knight swords, Icebringer and Frostreaper, despite being made from the remains of ''Warcraft'''s king of this trope, Frostmourne, manage [[SubvertedTrope not]] to be.
** Kingsmourne, another runeblade, outright ''enslaves'' its wielder to do the Jailer's will. [[spoiler:Made even more galling since it was originally Shalamayne before the Jailer reforged it and its wielder is Anduin.]]

* [[EmpathicWeapon Cursed Sword/Rune Blade]] from the ''VideoGame/RecordOfAgarestWar'' series. Sure, they both sound so simple you'd probably think [[TemptingFate "Eh, they don't sound that bad."]], only to face them in combat and find out just exactly why they were sealed in another plane of existence, though the Rune Blade can be safely wielded with some effort to getting it, which isn't easy. Oh, and did you know that you can face [[OhCrap more than one]] in their respective rematches? And their stats are upped to absurd amounts for their Extended Boundary Plane cousins, have fun with both!

* Mike, [[CuteWitch Yoriko's]] [[MagicStaff staff]] in ''VideoGame/ArcanaHeart'' which is a sealed Demon King in reality and is more likely to use [[GrievousHarmWithABody Yoriko as a bludgeoning device]] than the other way around. Though really, he is more of a JerkWithAHeartOfGold Weapon than an outright Evil Weapon. Offer him enough [[TrademarkFavoriteFood doughnuts]] and you'll have a friend for life.
* Essentially ''all'' of the minions of Smithy in ''VideoGame/SuperMarioRPG'' are this - except they're also sentient beings that want to ruin the world. Up to and including Exor, the massive sword that strikes Bowser's castle in the game's introduction. Smithy himself is something like this. He's a demonic blacksmith that wants to replace all of the wishes in the world with weapons, and his minions are part of this plan.

* While not actually evil, The Star Dragon Sword from ''VideoGame/{{Suikoden}}'' is an enormous [[{{Jerkass}} asshole]], and at one point tries to kill the party for being left in a cave. It was left in the cave because it was constantly complaining how much it hated it's wielder.
* Several games in the ''VideoGame/WorldOfMana'' series feature floating possessed swords as enemies.

* ''VideoGame/BreathOfFireIV'' has a variant that qualifies as terrifying in and of itself, being the Hex Cannon/Carronade. Per [[WordOfGod official documentation in the artbook]], [[spoiler: the Carronade not only poisons the land with curse energy but also simultaneously empowers and possesses its users]].
** What makes the Carronade especially horrific is two different things--the first being the ''scale'' of the thing [[spoiler: in that it is a literal Nuclear Weapons {{Expy}} and essentially the magical equivalent of multi-megaton nuclear [=ICBMs=]]] and the second being how the Evil Nuclear Weapons Expy is fueled: [[spoiler: Specifically, persons with a connection with the target are tortured to the point insanity and hopelessness, and then are used in human sacrifices as the "warheads". If that wasn't creepy enough, the EvilEmpire of the game specifically seeks out potential "warheads" based ''explicitly'' on the closeness of the connection between "warhead" and "target"--the Evil Weapon ''also'' specifically works under the theory LoveHurts, with the "best" ammo being a person in love with the target.]] Yes, you are reading that correctly: the Carronade is an Evil Weapon that is a magical method to NukeEm--and one which runs on horror specifically operating on the fact LoveHurts.
* The Ars Armagus and Nox Nyctores of ''Franchise/BlazBlue''. While the Ars Armagus, for the most part, "only" expose their weilders to [[AppliedPhlebotinum seithr]], [[PhlebotinumOverload which often leads to]] seithr addiction, physical and mental detoiration, death ([[FateWorseThanDeath if you're lucky]]) and/or BodyHorror bundled up with [[AndIMustScream complete and utter madness]] (if you're not), the Nox Nyctores are noticably more evil in nature. First of all, the catalyst to smelt a Nox Nyctores are tens of thousands of human souls. Secondly, the Nox Nyctores suppress "unnecessary" traits (e.g. {{fear|less fool}}, [[LackOfEmpathy empathy]], [[NoSympathy compassion]] and [[SanityHasAdvantages reason]]) and amplify others (e.g. [[HairTriggerTemper aggression]], [[ThePowerOfHate hate]], {{blood|knight}}lust and [[WithGreatPowerComesGreatInsanity latent psychosises]]) in their wielders in order to make them more "effective" in combat. Thirdly, there's also the fact that a Nox Nyctores shares the Ars Armagus' wonderful side effects.
** The possibly most obvious case of side effects within the games are those displayed by Jin Kisaragi while under the influence of Yukianesa. Sure, he's still a cynical, rude {{jerkass}} without it, but at least he's no longer AxCrazy.
** Tsubaki Yayoi's [[LightIsNotGood Izayoi]] steals all light around it, both physical and conceptual, in order to fuel [[LightEmUp its own powers.]] And, no, its weilder's light is ''not'' exempt: Tsubaki's usage of the weapon progressively robs her of her eyesight, but also (much thanks to the machinizations of [[ManipulativeBastard Hazama/Terumi]]) seems to take away all "lights" in her life as well, such as her relationships with her friends and love interest. In some of her endings the Izayoi even ends up extinguishing the light of her life itself.
** There's also [[BigBad Hazama]]/[[{{Troll}} Yuuki]] [[AxCrazy Terumi]]'s Ouroboros, a metallic snake-head attached to a chain, which has the passive ability to MindRape whoever is hit by it. [[SarcasmMode What luck]] [[BadPowersBadPeople that this weapon fell into the hands of a villain depraved enough to get off on making people miserable]].

* ''VideoGame/TalesOfSymphonia'' has the Devil's Arms, which are nine demonic, almost organic-looking and moving weapons that apparently can talk, although only Presea is able to hear them.
* The Masamune in ''VideoGame/ChronoCross''. [[VideoGame/ChronoTrigger Originally]] an EmpathicWeapon, it was once stolen from the kingdom of Guardia and used for evil, turning the once holy sword into a demonic, warped blade that can corrupt or take over the mind of anyone who wields it. By the time of the game's events, it was so corrupted that Lynx was able to use its evil aura to block the entrance to the Dead Sea. Removed from there by the sacred sword Einlanzer, and later cleansed of all evil influence, it was restored to its shining glory and transformed into the Mastermune.
* ''VideoGame/FearAndHunger'': Miasma is a sword looking and working almost identically to [[VideoGame/SoulSeries Soul Edge]], complete with compelling its user to slaughter their party members. Le'garde is the only party member capable of wielding it without risk, as all others lack the mental fortitude to safely use it.

* ''ComicBook/TheWarlordDC'': Machiste found an ancient cursed axe containing a demonic entity which took possession of his mind. The demon's will prevented Machiste from letting go of the axe. Seeing that the axe's influence was making Machiste more and more tyrannical as well as violent, Travis was forced to remove his friend's right hand, thus severing the axe's spell.
* The Ebony Blade, sword of ComicBook/TheAvengers member the Black Knight, was afflicted with a blood curse due to all the blood the original Black Knight had spilled. Dane Whitman eventually purged the Blade of its curse at Doctor Strange's behest by plunging it into the Brazier of Truth while Strange bathed them both in magic fire. The curse returned, however, when the Sub-Mariner used it to kill his wife Marrina. The curse seems to affect different people in different ways. It turned Dane into a statue, it amplified Proctor's ''gann'josin''-based powers, and it granted Sean Dolan great physical powers as Bloodwraith.

* Carvin' Marvin from ''ComicStrip/KnightsOfTheDinnerTable''.

* In ''ComicBook/{{Supergirl}}'' storyline ''ComicBook/TheKillersOfKrypton'', it is revealed Rogol Zaar's battle axe influences its bearer by making them angrier and more violent to feed from their rage.
* In one issue of ''ComicBook/JusticeLeagueInternational'', a teenaged delinquent breaks into Barda Free's car and steals her mega-rod, an incredibly powerful weapon forged in the firepits of Apokolips and issued to her when she led [[GodOfEvil Darkseid's]] furies. The mega-rod can be wielded safely by someone as strong-willed as Barda, but quickly possesses the teenaged thief, sending him on a rampage through New York, decrying his loyalty to Darkseid, even though he doesn't know who that is; the rod also drains his life-force. Barda tries desperately to get the rod away from the kid to save him, [[spoiler:but [[DownerEnding Huntress kills him first]]]].
* All-Black the Necrosword wielded by Gorr the God-butcher, a foe of ComicBook/TheMightyThor, is a blade of darkness that grants its owner vast power fueled by the lifeblood of slain gods. The sword also has a nasty habit of corrupting anyone who wields it into an AxCrazy butcher, even someone as heroic as Thor. It's one of the most powerful and evil weapons in the Marvel Universe.
* ''ComicBook/ContestOfChampions2015'': Guillotine's sword is an ancient living weapon which feeds on blood, and plenty of it for preference. When first seen it's in an abandoned catacomb under Paris, surrounded by bones, whispering to a Frenchman fleeing some revolutionaries to pick it up. In the modern day, it's having to get by on the paltry amounts Guillotine gives it, while suggesting she solve the little problem of her fiancé by murdering him. And as it turns out, ownership of the sword extends beyond death, since the flashback to Guillotine's origin shows that when she accidentally woke the sword up by cutting her finger on it, she was met by the spirits of every one of her forebears.
* The 2012 ''ComicBook/{{Batwoman}}'' series introduces the Ashoth, a sentient sickle that is able to possess someone with a similar bloodthirsty and carnal mindset when grafted to their body.
* ''ComicBook/RedSonja'': The ''Queen Sonja'' comic introduced a character named Ariok who possessed an evil sword that corrupted him every time he used it to kill. It was given to him by a demon as a means to destroy Ariok's enemies in exchange for the demon [[SexualExtortion having one night with Ariok's mother]].

* [[{{BFS}} Blackfire]] in ''Fanfic/WithStringsAttached''. It's a bit of a [[Literature/TheElricSaga Stormbringer]] {{Expy}}. The four hate it when the Hunter first displays it, and realize it's evil when they see the very similar Heart of Evil. In fact, it's so obviously evil that they're a bit startled when the Hunter claims it's not. When he asks to accompany them back to C'hou so he can give up his adventurous life, they point out that the natives (at least the skahs) have no concept of good or evil, and if he brings Blackfire with him they'll learn what evil is. (Though John mutters that the skahs “might not mind.”)

* ''Fanfic/TheMountainAndTheWolf'': As part of his payment for being Tyrion's bodyguard, the Wolf demands Bronn's crossbow (which Cersei ordered Bronn to use on Tyrion). Tyrion lets him have it, not seeing anything special about it, but to a Chaos warrior like the Wolf, a weapon used by a son to murder his father has considerable potential.

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

* Creator/MichaelMoorcock's Multiverse:
** Stormbringer (from ''Literature/TheElricSaga'' and other stories) actually steals people's souls in order to give its wielder strength -- including those of many of Elric's friends as well as his enemies. And [[spoiler: Elric's]]. Turns out the sword is actually a demon. It also has a sister sword, Mournblade.
** The Hand of Kryll and Eye of Rhynn from Moorcock's ''Literature/{{Corum}}'' saga are also... morally questionable. The eye allows you to see into a Limbo-like world of pain and shadows. The hand allows you to summon the creatures of this realm [[spoiler:who kill everything in their path. These victims then take their place in the purgatorial world until they are summoned, or else spend eternity in torment.]] Fairly evil. The fact that [[spoiler:even creatures who were fearful pacifists in life are motivated to become remorseless (and effectively invincible) killing machines by this realm]] should be a hint that it's not Disneyland in there. Differing timescales with the 'real' world, a la Narnia, are implied.
** Another is The Cold Sword from ''The Phoenix in Obsdian'', a blade which "personifies" EvilIsDeathlyCold. It's implied to be an alternate universe Incarnation of Stormbringer. While it doesn't consume souls, as far as we know, it's still far from a friendly sword. [[spoiler:Though it does save the world on its own accord at the end of the story.]]

* The crystal sword Alanna gets after Lightning breaks in the third ''Literature/SongOfTheLioness'' actively tries to kill whoever uses it. Alanna eventually masters it, but [[spoiler:it refuses to obey her once in the vicinity of its maker, [[BigBad Duke Roger]]]]

* The three titular swords of Creator/TadWilliams' ''Literature/MemorySorrowAndThorn'' are {{Empathic Weapon}}s with a twist: they can control their wielders against their will. However, the most fitting example of this trope is Sorrow, forged and wielded by the [[BigBad Storm King]] prior to his [[MyDeathIsJustTheBeginning death]]. Merely touching it can [[EvilIsDeathlyCold freeze you]] or [[GoMadFromTheRevelation destroy your soul]].
** The other two swords, Minneyar and Thorn, aren't exactly ''evil'' (though they are unnerving if you're not used to them), but the fact that they want to come together and be used alongside Sorrow makes [[spoiler: it possible for the Storm King to use them as his tools anyway]].
* In Creator/GrahamMcNeill's TabletopGame/Warhammer40000 Literature/HorusHeresy novel ''Fulgrim'', Fulgrim's Chaos-tainted sword. It lures him into treachery and murder [[spoiler:and when he [[CainAndAbel fights his own brother]], Ferrus Manus, convinced him that he must kill him to save his life. Then it plays on his guilt and [[HeelRealization lets him realize the full extent of it]], and uses that to persuade him to [[DemonicPossession let it possess him]].]]

* Creator/SimonRGreen uses these in a couple of his works:

** ''Literature/{{Nightside}}'': The Speaking Gun. It's made out of meat, and capable of unmaking anything by speaking its name in reverse. Created to kill angels, but hateful and eager to kill ''anything''.

* The "thirsty sword" in ''The Remarkable Journey of Prince Jen'' is quite possibly AxCrazy as well as evil. It constantly whispers into the wielder's mind "Give me to drink" it can also "slice through anything without force". [[spoiler: Though it reaches its limit at one point, twists out of one owner's hand and screams "GIVE ME NO MORE TO DRINK!]].
* The sword Excalibur in ''Bring Me the Head of Prince Charming''. After the eponymous prince takes it off a BlackKnight, he finds that the sword is utterly paranoid and AxCrazy, and tries to convince him to kill everyone he meets. After he leaves it in the forest, it tries to get revenge on him by siccing a group of demons on him.
* The four elemental swords ''Literature/TheSecretsOfTheImmortalNicholasFlamel''. They absorb the memories of anything they cut, actively corrupt an unprotected user, eventually absorbing their souls, and so far in the series nothing has been introduced that they can't kill. Clarent (fire), the most evil of all of them, is the one the protagonists end up with [[spoiler: for a while]]. Even the [[EldritchAbomination Eldritch Abominations]] are afraid of them.
* The short sword with the wavy black blade in Creator/AaronAllston's ''Literature/GalateaIn2D''. Kevin designed it to be the sort of sword a devil would use, and it's capable of killing TheCape.
* In L. Jagi Lamplighter's ''[[Literature/ProsperosDaughter Prospero in Hell]]'', the Wounding Wand. Caurus thinks he's too tired, because [[TalkingWeapon he hears it]]; Miranda warns him to not listen.
* ''Literature/TheDresdenFiles'' has the Blackstaff, a possibly ''living'' stave that massively amplifies the power of any act of black magic it's used in. In an inversion, however, the stave is used to ''prevent'' the wielder from getting corrupted; when [[spoiler: Ebenezar [=McCoy=]]] uses it to kill hundreds of mercenaries in one go, the staff seems to absorb the darkness of the act rather than [[EvilFeelsGood letting its corrupting influence affect the wizard]].
* In ''Literature/TimeScout'', whenever anyone brings a modern weapon downtime, its presentation is rather... dark in comparison to the works of art that art downtime weapons.
* In Literature/{{Portlandtown}}, the Hanged Man's red-handled [[HandCannon Colt Walker]] always shoots to kill, and makes whoever's carrying it want to shoot.
* Creator/LarryNiven's "Literature/NotLongBeforeTheEnd" had Glirendree. The sword gave great power to its wielder, who would inevitably die within a year. The Warlock tells the current owner (who hadn't been aware of this) that Glirendree is a demon, correcting him when he asks "There's a demon in the blade?" that ''there is no blade''. It's a demon in the ''shape'' of a blade.
* The swords in Creator/FredSaberhagen's ''Literature/BookOfSwords'' series don't talk, but each of them has a specific magic power that sounds like it would be awesome but in fact are mostly BlessedWithSuck. (Farslayer, for example; you can throw it and tell it to kill anyone, and it will, no matter how far away or well guarded they are. Of course, that leaves it right next to the allies of the person you just killed, who can then pick it up themselves...) It's somewhat ambiguous whether the swords themselves are evil or just cursed (and a couple of them aren't too bad, except that they make you a target for everyone in the world who would prefer to have it themselves).
* During the liberation of Gereon in Literature/GauntsGhosts, Merrt, an especially unlucky Ghost, loses his lasgun in battle and eventually receives another one, taken from a corpse of an enemy soldier. Not only is it in very poor condition, but it is possible that his new lasgun is tainted by Chaos. Since he is too afraid to admit that he had used a corrupted weapon, Merrt keeps the rifle for the next campaign and starts to believe that it is cursed and will bring his doom. Eventually, he decides to overcome the gun's evil influence with his own strength of will and, although it jams on several occasions, manages to survive the defense of the Hinzerhaus fortress, finally deciding to leave it behind him.
* Shows up a lot in Creator/DavidGemmell's Literature/{{Drenai}} saga: Turns out that, among other weapons, [[spoiler: Druss's mighty ax, Snaga]], as well as [[spoiler: the Swords of Night and Day used by Skilgannon]] are so effective not just because of their respective wielders' skill, but also because they each come with a built-in bloodthirsty demon.