History Main / WeaponOfXSlaying

* ''VideoGame/XenobladeChronicles1'' The Monado is the only weapon able to easily damage the [[MechaMooks Mechons]] from the [[EternalEngine Mechonis]], but conversely it can’t harm the sentient organic beings of the [[GiantCorpseWorld Bionis]]. Then the Mechons begin deploying [[EliteMooks Face Mechons]], which similarly can’t be harmed with the Monado [[spoiler: because they’re humans who have undergone UnwillingRoboticization]].

* ''LightNovel/ACertainMagicalIndex'': One story arc revolves around a weapon called the Stab Sword, which is able to kill Saints.

** Noble Phantasms can obtain this type of property from their Servant's associated legends. Arondight and Balmung have a bonus against any being associated with dragons due to their wielders both being known to have slain one. In ''VisualNovel/FateStayNight'', it's mentioned that [[spoiler:Saber, as [[HistoricalGenderFlip Arturia Pendragon]]]], is weak to such anti-dragon weapons, [[InformedAttribute though she never actually faces any]]. She does end up facing one in ''LightNovel/FateZero'', [[spoiler:the previously mentioned Arondight]], but she's more unnerved by who's wielding said weapon -- [[spoiler:her former friend, Lancelot]].
** ''LightNovel/FateZero'': Kiritsugu Emiya's Origin Bullets are designed to kill mages. They can pierce through any magic defenses, and once they enter the target's body, they will eventually cause the target's magic circuits to run wild and explode. The effect becomes greater the more powerful the target's magic. The number of Origin Bullets is relatively sparse, as they are made out of Kiritsugu's own rib, thus he cannot simply make them whenever he wants.

** The artifact axe Wuuthrad [[ScrewYouElves does more damage to Elves]] ("Wuuthrad" even means "''[[NamesToRunAwayFromReallyFast Elf-Grinder]]''").

** The Daedric artifact Dawnbreaker, which not only sets regular foes on fire but does extra damage to undead, the latter of which can trigger an explosive shockwave that either delivers a OneHitKill to any remaining undead or makes them [[AttackAttackRetreatRetreat run for the hills]]. [[TooDumbToLive It is not advisable to use this weapon if you are a vampire, and thus undead yourself]].

** The Transphase Eradication Rod is a weapon developed by the Goa'uld to fight the Re'tu, invisible insectoid aliens who are 180° out of phase with the rest of the world. It projects a narrow beam revealing the Re'tu to normal vision, before firing a multiphase energy bolt capable of blowing it up.

** Ma'Chello devoted his entire adult life to creating "weapons to defeat the Goa'uld", including a sort of worm engineered to kill a Goa'uld parasite. Although the worm kills the host as well, clearly Ma'Chello thought it was more precise than that, as it informs the host of their freedom as it exits.

* Franchise/DCExtendedUniverse, ''Film/{{Aquaman|2018}}'': Arthur/Aquaman and other Atlanteans are impervious to ordinary weapons, but not to Atlantean weapons. Black Manta stabs Aquaman with an Atlantean blade, then stabs the wound with his ordinary dagger, which is extremely painful.

* Franchise/MarvelCinematicUniverse, ''Film/AvengersInfinityWar'': Thor realizes the heroes won't be able to kill Thanos with their standard weaponry, so he, Rocket, and Groot forge Stormbreaker, an axe specifically designed to kill Thanos. [[spoiler:When used in the climax, it works ''marvelously''; it effortlessly shreds through Thanos's defenses and mortally wounds him. It only fails to kill him outright because Thor makes the TragicMistake of twisting the knife rather than finishing Thanos off, giving the latter time to perform his BadassFingersnap.]]

* ''Series/StargateSG1'': Three examples:
** The first is the energy weapon for killing [[BigBad Anubis']] [[SuperSoldier Kull warriors]], which is of indeterminate use against anything else but will kill Kull in a couple shots by negating the Ancient phlebotinum that brought them to life in the first place.
** The second is the Replicator disruptor and the anti-Replicator gun later adapted from it, weapons built using Ancient knowledge that disrupts the ability of individual Replicator blocks to communicate with each other.
** Finally, the weapon Merlin designed to destroy ascended beings, which is finally used to wipe out the Ori in season 10.

** The [[AnAxeToGrind Azure Axe]] has the same "save or die" effect on undead as the Mace of Disruption. There is a small chance it even works on [[TheDragon Bohdi]].

*** In ''VideoGame/FireEmblemBlazingSword'', Lyn gets the Mani Katti, while Hector gets the [[AnAxeToGrind Wolf Beil]].

** The Sommerswerd is a god-forged golden blade, devastating against undead, and deadly even for the Darklords. [[spoiler:It is stated late in the series that it could be lethal even against [[BigBad Naar]].]] To be honest, it's quite good at killing ''anything'' anyway -- ''none'' of the extremely powerful entities encountered in the series, including the [[NamesToRunAwayFromReallyFast Chaos-master or the Deathlord of Ixia]], show any immunity toward it.

* ''TabletopGame/{{Pathfinder}}'' has many of the same enchantments as its parent game, D&D. A unique example is Raven's Head, a mace recovered by the [=PCs=] at the end of ''Wake of the Watcher'', the fourth part of the ''Carrion Crown'' adventure path. It allows a cleric wielder to channel positive energy through it to deal additional damage to undead foes, and also posesses the "disruption" quality, meaning any undead hit by it must save or be destroyed. The save is fairly low, but considering that 1) every save has a minimum 5% chance of failure, 2) the save-or-die triggers every time the weapon hits an undead, possibly multiple times in a round and 3) the last two parts of the adventure path are overwhelmingly dominated by undead enemies, the "dusting" effect is very likely to come into play.
** In the 2nd edition ''Bestiary 2'', even though vorpal swords are great against anything living with a head - it turns out that the vorpal sword was originally made to kill the mighty Jabberwocky (which have an amazing 23 challenge rating - in comparison almost all dragons are under 20). These creatures are sent by the Eldest, fairy gods of the First World to wreak havok on the Prime Material Plane. Besides the usual head-chopping ability, vorpal swords cause fear to Jabberwocks and get a massive +20 damage per hit on a Jabberwocky.

* ''VideoGame/NetHack'': Several of the artifact weapons fall into this category e.g. Ogresmasher, Werebane (which happens to ''also'' invoke DepletedPhlebotinumShells, since it's a silver saber), and Orcrist. Additionally Vorpal Blade, which can OneHitKill anything with a head 5% of the time, does so 100% of the time against jabberwocks.

** The Sommerswerd, devastating against undead, and deadly even for the Darklords. [[spoiler:It is stated late in the series that it could be lethal even against [[BigBad Naar]].]] To be honest, it's quite good at killing ''anything'' anyway -- ''none'' of the extremely powerful entities encountered in the series, including the [[NamesToRunAwayFromReallyFast Chaos-master or the Deathlord of Ixia]], show any immunity toward it.

* ''Literature/WayOfTheTiger'': played against the hero: at one point, master assassin Mandrake will forge a special enchanted rapier/cane sword with an inscribed rune which makes it the "Avenger-Slaying Rapier" and could allow him to kill the protagonist with a mere scratch. [[spoiler: It is wielded by the Impostor in the final book of the series.]]

** The "dread" enchantment from the ''Epic Level Handbook'' is bane taken UpToEleven, with even greater bonuses than normal bane, along with a potential OneHitKill effect against its chosen target. Unfortunately, it's priced equivalent to a +7 bonus, making it AwesomeButImpractical, unless you're expecting to fight a ''lot'' of enemies of the designated type.

* ''VideoGame/DungeonCrawl'' has weapons of orc slaying, which simply give a damage bonus against orcs.

** Noble Phantasms can obtain this type of property from their Servant's associated legends. Arondight and Balmung have a bonus against any being associated with dragons due to their wielders both being known to have slain one. In ''VisualNovel/FateStayNight'', it's mentioned that [[spoiler:Saber, as [[HistoricalGenderFlip Arturia Pendragon]]]], is weak to such anti-dragon weapons, [[InformedAttribute though she never actually faces any]].

** Minmax finds a "[[FanNickname Racist Axe]]" that gains an accuracy and damage bonus if the wielder is the same race as their target. He gives it to his comrade Forgath when they're attacked by [[KnightTemplar Kore]], since both Kore and Forgath are dwarves.

* ''VideoGame/AethrasChronicles'': Some weapons do extra damage against certain types of enemies. For example, the Sword of Right is an anti-undead weapon.

* ''Anime/SenkiZesshouSymphogear'': While effective to the point of overkill in most situations, the ''Symphogear'' system was initially developed to combat a type of EldritchAbomination called the Noise. More specifically, using a Symphogear forces any Noise within earshot into a tangible state that ''can'' be slain in the first place, and makes the wielder immune to their TouchOfDeath.

* ''Film/{{Aquaman|2018}}'': Arthur/Aquaman and other Atlanteans are impervious to ordinary weapons, but not to Atlantean weapons. Black Manta stabs Aquaman with an Atlantean blade, then stabs the wound with his ordinary dagger, which is extremely painful.
* ''Film/AvengersInfinityWar'': Thor realizes the heroes won't be able to kill Thanos with their standard weaponry, so he, Rocket, and Groot forge Stormbreaker, an axe specifically designed to kill Thanos. [[spoiler:When used in the climax, it works ''marvelously''; it effortlessly shreds through Thanos's defenses and mortally wounds him. It only fails to kill him outright because Thor makes the TragicMistake of twisting the knife rather than finishing Thanos off, giving the latter time to perform his BadassFingersnap.]]

** Many of the series' main villains are vulnerable to ''their own weapons'', which you must obtain to even complete the game. Including Razaak's sword in ''Literature/CryptOfTheSorcerer'', the Lizard King's [[FlamingSword Fire Sword]] in ''Literature/IslandOfTheLizardKing'', the Nightstar from ''Literature/VaultOfTheVampire'' which deals massive damage to COunt Heydrich, among others.
** Subverted with The Spear of Doom from ''Literature/LegendOfTheShadowWarriors''. You use it NOT to kill VOivod, the main villain, but to resurrect him back to human form. Killing Voivod in battle will only have him resurrecting immediately and killing you on the spot.

* ''TabletopGame/BeastThePrimordial'' has this as one of the Anathemas that Heroes may place upon the titual Beasts. Where most Anathemas give a Beast some kind of KryptoniteFactor or FatalFlaw inherent to its own nature, the Weaponbound Anathema externalizes the vulnerability into a single weapon which is supernaturally potent against the Beast to which it is linked.

* ''VideoGame/LegacyOfKain'': Moebius carries a magical scepter that has the power to induce weakness in vampires.

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