[[quoteright:250:[[Webcomic/OnePunchMan http://static.tvtropes.org/pmwiki/pub/images/OPM_aura_9217.png]]]]
[[caption-width-right:250: [[ArtShift Everyone else]] just saw [[CrouchingMoronHiddenBadass a guy in a dumb costume]].]]

Particularly common in Eastern works is the idea that when someone intends to inflict pain or death, their "Killing Intent" can be felt as a slight pressure or chill, even to people unaware of their presence. The effect is amplified if you [[WindowsOfTheSoul look into their eyes]], or if they want to hurt ''you'' in particular. Trained and vigilant warriors generally radiate low levels of Killing Intent at all times, while anyone who constantly radiates ''high'' levels of Killing Intent is either evil or [[BloodKnight obsessed with combat]] (and may [[NotSoDifferent feel kinship towards heroes who possess it]]). There's generally a noticeable difference between "hot-blooded" and "cold-blooded" Killing Intent too. Sometimes this is considered a form of {{Ki|Attacks}}, or has an effect on Ki.

While most people can only detect Killing Intent subconsciously, people who have enough combat experience (or are just perceptive) can notice it so well that it borders on SpiderSense or DetectEvil. Likewise, some particularly vicious characters hone their Killing Intent to the point where it can leave people nearby paralysed with fear or even inflict hallucinations. In either case, this will be treated as [[CharlesAtlasSuperpower a mundane skill and not a supernatural ability]]. Some people will even tell you it's possible in RealLife.[[note]]sometimes adopting [[DoingInTheWizard the less mystical explanation]] that it's really detecting slight differences in air pressure, temperature, smell and so on[[/note]]

While having some degree of Killing Intent is normally [[TeachHimAnger required to fight effectively]], sometimes a character will be able to attack without exuding any Killing Intent at all (through LackOfEmpathy, [[NervesOfSteel controlling their emotions]] or even [[{{Cloudcuckoolander}} spacing out while fighting]]), making them an [[ConfusionFu unpredictable combatant]] or even a HeroKiller.

In some works Killing Intent can be used as a rough way to measure PowerLevels, as [[JapaneseSpirit someone with sufficient willpower to resist an enemy's Killing Intent will necessarily be at least as strong as them]].

Since it's hard to depict a sixth sense through a visual medium, KillingIntent is often [[EditorialSynaesthesia represented]] in {{Anime}} and {{Manga}} by ArtShift towards a more serious style, or even a BattleAura (the metaphorical version), though this has become less common over time. When KillingIntent is considered a form of (or augments) Ki, it can be represented by a ''non''-metaphorical aura.

The Japanese term for this is ''sakki'' (short for ''satsu ki''), which is primarily used by [[{{Ninja}} practitioners of Ninjutsu]]; "Killing Intent" is the most literal translation.

Compare DetectEvil, AllergicToEvil, SpiderSense and KungFuClairvoyance. See also {{Ki|Attacks}} and MagicRealism.
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!!Examples

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[[folder:Anime and Manga]]
* In ''Manga/{{Naruto}}'' most experienced ninjas can explicitly sense killing intent, and [[http://naruto.wikia.com/wiki/Killing_Intent using it to paralyse enemies]] is a recognised strategy (most famously used by Orochimaru). This ability explicitly does not use [[{{Mana}} chakra]].
* In ''Manga/{{Bleach}}'' the force of [[BloodKnight Kenpachi Zaraki]]'s killing intent causes Ichigo to hallucinate that he is being stabbed as he approaches.
* The martial artists in ''Manga/RanmaOneHalf'' can sense if someone is about to attack them. Ranma is so good, he sometimes dodges attacks in his ''sleep''. Unfortunately for Ryoga, his "danger sense" is also [[TheExitIsThatWay affected]] by his terrible sense of direction.
* In ''Manga/OnePiece'', this is one of the functions of Haki.
** Zoro does this as well. His "Kiki Kyutoryu: Asura" is said by Kaku to be a illusory manifestation of his killing intent.
* In ''Manga/LoneWolfAndCub'', every half-way decent martial artist possesses this ability.
* ''Manga/RurouniKenshin'' uses this, while [[MaybeMagicMaybeMundane leaving it ambiguous whether it's based on Ki or just body language]]. The only time Kenshin had significant trouble fighting against someone of a (slightly) lower skill level was Soujirou, whose combination of being a StepfordSmiler and super speedster made him both difficult to read and difficult to react to.
** Additionally, swordsmen of high enough caliber generate BattleAura that can cause minor destruction.
* In the manga version of ''Manga/FullmetalAlchemist'' this is how Riza [[spoiler:figures out that Selim Bradley is actually the homunculus Pride.]]
* One of the many appliances of Nen in ''Manga/HunterXHunter''. It's worth noting that people unprotected by their own aura could potentially die or suffer serious psychological trauma if they were to be attacked by a strong enough killing intent.
* Parodied in ''Anime/BusouShinki'', where Clara becomes alarmed and claims that she's "never felt so much killing intent"... shortly before a letter falls on her head (she's 15cm tall, but still).
* A silly example in ''Webcomic/OnePunchMan'', where [[UltimateLifeform Asura Rhino]]'s combat instincts cause him to see the protagonist [[ArtShift with heavy shading]] and [[BattleAura surrounded by dark flames]]... but he's still drawn in [[NonstandardCharacterDesign a simple style]] and with a baffled expression.
* Martial artists in ''Manga/AngelDensetsu'' are constantly amazed at being unable to sense Kitano's killing intent. They always assume he is so skilled that he can hide this, instead of realizing he has [[ActualPacifist less anger than an angel]].
* In ''Manga/{{Monster}}'', the eponymous SerialKiller is so evil that he can terrify people [[http://static.tvtropes.org/pmwiki/pub/images/monster_killingintent_350w_9552.png just by being in the same part of the building]].
* In ''Manga/KenichiTheMightiestDisciple'', every martial artist senses or projects killing intent at one time or another. On at least one occasion, a master-class fighter knocks a {{Muggle|s}} out by projecting killing intent and looking into their eyes.
* ''{{Toriko}}'' has killing intent manifest as monstrous {{Animal Battle Aura}}s known as "Intimidations".
* [[Manga/FistOfTheNorthStar Kenshiro]] manifests one of these which freaks out a Fang Clan GiantMook, a nearly feral beast who goes into a panic when he senses Kenshiro's sheer badassery and intent to wipe out the entire Fang Clan.
** In addition, this was used as a final test to determine who would be the successor of Hokuto Shinken. The test involved Kenshiro and Raoh coming face-to-face with a tiger. When the tiger backs away from Ken, Raoh takes this as a sign that the tiger thinks Ken is too weak and then kills him. In truth, the reason the tiger backed away from Ken was because he sensed so much power and killing intent radiating from him in comparison to Raoh that he feared for his own life.
* Nagisa from ''Manga/AnsatsuKyoushitsu'' hides his killing intent very well... which is for the best because when people ''are'' exposed to his bloodlust, he freaks out trained government special ops soldiers and sends middle-schoolers home in tears with a single (theoretically unthreatening) sentence and a calm smile. For the record, Nagisa is a physically small and unremarkable middle school student in a bottom-rank class, and is so dainty to the point he has [[DudeLooksLikeALady been mistaken for a girl several times]] and he ''has'' the strength of a girl.
* ''Franchise/LyricalNanoha''
** In ''Manga/MagicalRecordLyricalNanohaFORCE'', when the Special Duty Section 6 are arresting Hades Vandein, his killing intent is so strong that everyone sees a hallucination how he slices Teana down. [[ObviouslyEvil And this guy always]] [[BlatantLies pretends to be an innocent citizen.]]
** Chapter 45 of ''Manga/MagicalGirlLyricalNanohaVivid'' has [[{{Samurai}} Micaiah]] deliberately emanating this [[spoiler:even though she's just attacking with a practice sword]] so she could bring out the depressed [[TheAce Sieglinde's]] [[SuperpoweredEvilSide Black Jeremiah side]] as a lead-in to her pep talk for the latter.
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[[folder:Film]]
* In ''Film/KungFuHustle'', Sing is sent to retrieve [[NamesToRunAwayFromReallyFast The Beast]] near the end of the movie. When he ends up right outside the room The Beast is in, he hallucinates a wave of blood bursting through the door [[Film/TheShining Shining-style.]]
* In ''{{Film/Hero}}'', [[ProperlyParanoid the emperor]] keeps a number of candles between himself and any visitors allowed to come within a hundred paces, claiming that the flames are disturbed by "murderous intent" (all of them blowing towards the emperor when Nameless is thinking of killing him, and then blowing in random directions when his resolve wavers). No sort of magical explanation is given for this, and Nameless' unquestioning acceptance of it suggests that he is familiar with the idea, presumably making it a variation of this trope, rather than a separate sort of DetectEvil magic.
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[[folder:Literature]]
* In ''LightNovel/FullMetalPanic'' Sousuke's past as a {{child soldier|s}} has given him the ability to sense killing intent, which he uses to set traps for assassins targeting him.
** This was also used to torment him. [[spoiler: One of Mithril's agents would observe him via the scope of a rifle, and find that Sousuke actually got visually agitated when he did this. It's implied that much of Sousuke's misbehavior in school is caused by him sensing the agent's killing intent without being able to tell where it's coming from, causing him to lash out against people nearby.]]
* ''LightNovel/SwordArtOnline'' refers to the ability to sense killing intent from monsters in the game as "Hypersense", which may or may not actually exist.
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[[folder:Tabletop Games]]
* ''TabletopGame/DungeonsAndDragons'' 3.5 has the ''detect hostile intent'' [[PsychicPowers psionic power]]. While active you can sense the presence of people with violence on their minds, are immune to surprise attacks (unless the attackers' minds are somehow shielded), and can use the Sense Motive skill as a free action.
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[[folder:Video Games]]
* ''Franchise/StreetFighter'' utilizes the {{Ki|Attacks}}-based version as a major element known as the ''Satsui no Hadou'' (Surge of Murderous Intent). [[BloodKnight Akuma]] is considered a master of this energy and as such fights and kills anyone who faces him. Ryu also temporarily gets possessed by this energy as [[SuperpoweredEvilSide Evil Ryu]], and tends to go further than Akuma. This is an especially present element in the ''[[VideoGame/StreetFighterAlpha Alpha]]'' series and the ''Ryu Final'' Manga.
* In the Franchise/{{Nasuverse}}, skilled fighters can do this. In the ''Unlimited Blade Works'' route of ''VisualNovel/FateStayNight'' Shirou is able to sense that he is being followed by [[TheSnarkKnight Archer]] because he is taunting Shirou with his killing intent. When Shirou calls him out on it he is impressed that such an [[IneptMage unskilled magus]] could detect it. Shirou also uses Archer's killing intent to tell from where he is launching his [[TrickArrow attack]] against Berserker during their fight in the graveyard, and notes that [[spoiler:it's directed at more than ''just'' Berserker]].
** And then there's [[spoiler:True Assassin's]] [[StealthExpert Presence Concealment]] skill, which renders him virtually impossible to find, unless he's preparing to attack a target in which case his own massive KillingIntent betrays him and makes he much easier to find. Though, in all fairness, when this time comes it generally is already too late.
* [[BloodKnight Angela]] from PrincessWaltz is right there with with the likes of [[Manga/{{Bleach}} Kenpachi]] in terms of bloodlust. In many occasion her glare has caused hardened warriors to flinch and even think that they were vomiting blood after being ImpaledWithExtremePrejudice just from being 'hit' by it.
* In ''Vampire Savior[=/=]VideoGame/{{Darkstalkers}} 3'', [[AxCrazy B.]][[EnfantTerrible B.]] [[CuteAndPsycho Hood]], a [[PsychoForHire bloodthirsty]] [[RankInflation Special S-Class]] [[BountyHunter Darkhunter]], is so malevolent that her stare alone can instill a paralyzing fear into the [[PowerLevels lower-ranked]] Darkstalkers of Makai. This same darkness in her heart was what caught [[BigBad Jedah]]'s attention and allowed her to enter his [[PocketDimension Majigen]]. Let it be said that B.B. Hood is the ''TokenHuman'' of the cast.
* In ''VideoGame/SuperSmashBros'', while chatting with Otacon, [[Franchise/MetalGear Snake]] mentions [[Franchise/TheLegendOfZelda Ganondorf]] is "giving off a murderous vibe." He's also uneasy with trying to fight him - "even getting close to him makes my skin crawl."
* The ''Franchise/{{Pokemon}}'' game franchise has the attack Dark Pulse, introduced in the fourth generation. It's described as "a horrible aura imbued with dark thoughts", and may cause enemies to flinch.
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[[folder:Web Comics]]
* Early in ''Webcomic/TheDragonDoctors'', the invisible MurderInc assault is detected in advance due to so many people radiating killing intent at the same time.
[[/folder]]

[[folder:Real Life]]
* As mentioned above, Killing Intent can occur in everyday life, to an extent; i.e. body language, verbal cues, and the way you can just FEEL it when someone is glaring at you.
** According to an article on Cracked, that [=FEEL=] stems from being able to "smell" certain chemicals another person nearby is exuding--though it's not so much a smell as something that strikes directly at your mind and instincts, so you won't consciously sense any odors.
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