History Main / BloodbathVillainOrigin

* In ''Fanfic/TheJadedEyesSeries'' Harry snaps and murders the Dursleys when he's six years old.
* [[VillainProtagonist Sni]][[SerialKiller vy]] from ''[[https://www.youtube.com/watch?v=3WRr-KQjDxA La Sangre de Mi Sangre]]'' is another one of those rare characters who manage to fulfill ''every condition for it''. To elaborate, she was an EmptyShell CreepyChild who one day found a lost Garchomp, so she keeps him company, as time passes the Garchomp falls in love with her, she pretends to go along until she ends up BecomingTheMask. When her sister finds out and [[KnightTemplarBigBrother she]] [[PedoHunt kills him]]. Snivy, having watched this in secret, decides to go the BestServedCold route, preparing a trap for her sister and after she was done killing her, went back home and killed all her remaining family and friends for [[ForTheEvulz no real reason, even admitting as such]].

* ''WebAnimation/WhereWasMyHero'' shows a truly ''chilling'' types 1 and [[WhereIWasBornAndRazed 4]] example with none other than [[spoiler:[[Franchise/SonicTheHedgehog Tails]], set in an alternate universe where he never meets Sonic]], his life gets worse and worse until he becomes an AxCrazy WoobieDestroyerOfWorlds with OmnicidalManiac tendencies.

* ''Literature/HarryPotter'': Sirius Black killing a bunch of innocent bystanders [[spoiler:is a subversion, as it was Peter Pettigrew who did so and for whom this trope does apply.]]

* In the Franchise/StarWarsLegends, the origin story of Palpatine/Darth Sidious involves him throttling his family and their bodyguards to death, and intending to at the very least kill his father since he was born due to hatred of him, and for no reason other than his family forbidding his contact with Plagueis, as revealed in ''Literature/DarthPlagueis''.

* [[spoiler: Rumpelstiltskin]] in ''Series/OnceUponATime'' goes on a killing spree after suddenly acquiring awesome powers. Justified by the fact that they were all soldiers trying to conscript his barely 14 year old son, and he was trying to protect the kid - but he was still evil, since the power was dark and corrupted him.
-->'''Rumple:''' ''(SlasherSmile)'' You're safe, Bae. Do you feel safe, son?\\

* TabletopGame/{{Warhammer}} Fantasy Battles:

* ''VideoGame/FatalFrame'': [[spoiler:Kirie Himuro and Lord Himuro from ''VideoGame/FatalFrameI'', Sae Kurosawa from ''VideoGame/FatalFrameII'', and Reika Kuze from ''VideoGame/FatalFrameIII''. Except for Lord Himuro, all resulted directly from a botched sacrifice, and Himuro got the curse second-hand. They all suddenly engaged in mass-slaughter, and their victims became enraged, vengeful ghosts themselves who continued to claim victims decades or even centuries after.]]

* Revealed by WordOfGod to be true of ''WesternAnimation/GravityFalls'''s BigBad, the interdimensional, omnicidal [[GreatGazoo all-powerful whackjob]] Bill Cipher. He originally lived in a parody of Literature/{{Flatland}}, but somehow gained [[PhysicalGod phenomenal cosmic power]], [[WithGreatPowerComesGreatInsanity went nuts as a result]] and literally ''[[OmnicidalManiac set his entire dimension on fire]]'', his own family included. With his homeworld reduced to a void, Cipher then hopped through other dimensions, secretly planning to destroy each and every one in the same way.

* ''WesternAnimation/MonstersVsAliens'': Although we don't hear all of Gallaxhar's back story, he does directly state that he was the one who [[EarthShatteringKaboom blew up his planet]].

* The Death Knight from ''VideoGame/FireEmblemThreeHouses'', or as he's more commonly known, [[spoiler:Jeritza Von Hrym,]] though his real name is [[spoiler: Emile Von Bartels]]. [[spoiler: His childhood as Emile wasn’t exactly nice, with his father using Mercedes' mother as a BabyFactory to create children that bear her Crest. When Mercedes and her mother escaped, an 11-year-old Emile chose to stay to protect them from their father’s wrath. Years later, when his father found where they were hiding, Emile was driven to murder his father and the entire House Bartels in a blind rage when his father learned Mercedes’ mother was too old to have children, choosing to use Emile’s sister Mercedes instead, who was still a teenager.]] While he feels no regret for these actions, the event was so traumatising that he began to become a full-on BloodKnight that would even kill [[spoiler: his big sister.]]

* ''VideoGame/SuikodenIV'' has Graham Cray, who is considered responsible for the destruction of his hometown in a Type 2. [[spoiler:In reality, it was his son who fatally unleashed the full power of the Rune of Punishment against soldiers running a FalseFlagOperation. Becoming TheScapegoat on top of everything else just drove him into villany.]]

* In ''VideoGame/{{Valis}} II'' (Japanese computer version), the origin story of Cruel King Megas is that, after being exiled by his kingly father, he returned to slaughter his entire family, tearing his brothers to pieces and eating his mother. Only his father's HeroicSacrifice, turning him into a SealedEvilInACan, prevented further bloodshed... until the seal was broken.

* ''Webcomic/DanAndMabsFurryAdventures'' has a relatively sympathetic example in Regina Darkblood, who accidentally kills an innocent civilian and then kills several adventurers because of a tragic case of the universe's equivalent of MistakenForPedophile.

* [[spoiler:Cinder Fall]] of ''WebAnimation/{{RWBY}}'' was an innocent victim of abuse, enslaved by her so-called "guardian" and regularly tormented by her and her daughters. She secretly learned to fight from her mentor Rhodes in the hopes that one day she could escape and become a Huntress. Then her abusive "family" found out, went to punish her, and she finally snapped and killed all three of them. When Rhodes tried to bring her in for the murders, the betrayal broke her and she killed him too.

->'''Kakashi:''' Without pause or hesitation, a young boy who was not even seen a ninja had killed over a hundred of the students.\\

->'''Kakashi''': Without pause or hesitation, a young boy who was not even a ninja had killed over a hundred of the students.\\
'''Zabuza''': ''[smiling]'' That sure was... fun.

* ''Manga/{{Berserk}}'' sees to it what is arguably one of ''the'' most infamous examples in all of manga with [[spoiler:[[TheBeautifulElite Griffith]] ascending to becoming a demon during the once-every-[[NumberOfTheBeast 216]]-years even called [[TotalEclipseOfThePlot The Eclipse]]. [[JumpingOffTheSlipperySlope Over a gradual descent]] from [[FromNobodyToNightmare nothing into the monster he is now]], he [[EtTuBrute betrayed everyone he ever lead and cared for]] after [[BrokenAce wounding up broken in mind and body from a year of torture]], [[DeityOfHumanOrigin rejecting his humanity to ascend to godhood]] and [[HumanSacrifice brutally sacrifice his entire army for a second chance at life]]. To make a ''very'' long story short: [[CurbStompBattle it]] ''[[AnyoneCanDie does]]'' '''''[[RapeIsASpecialKindOfEvil NOT]]''''' [[DevouredByTheHorde end well]] for anyone not [[SatanicArchetype Griffith]], [[DemonLordsAndArchdevils the God Hand]], or [[TheLegionsOfHell the Apostles]]. The end result was [[KillEmAll so devastating]] that there were only ''two'' survivors from the massacre (who only lived thanks to [[BigGood The Skull Knight]]'s [[BigDamnHeroes timely intervention]] in an event that going by the God Hand's reaction had never happened before), one of which was [[RapeLeadsToInsanity driven to insanity from being raped by the newly-reborn Griffith]] and the other losing an arm, eye, and getting a [[JerkJustifications factory reset]] into becoming a textbook WoobieDestroyerOfWorlds in his [[RoaringRampageOfRevenge demon gore-soaked trail for revenge]]]].

* ''Manga/{{Berserk}}'' sees to it what is arguably one of ''the'' most infamous examples in all of manga with [[spoiler:[[TheBeautifulElite Griffith]]. [[JumpingOffTheSlipperySlope Over a gradual descent]] from [[FromNobodyToNightmare nothing into the monster he is now]], he [[EtTuBrute betrayed everyone he ever lead and cared for]] after [[BrokenAce wounding up broken in mind and body from a year of torture]], [[DeityOfHumanOrigin rejecting his humanity to ascend to godhood]] and [[HumanSacrifice brutally sacrifice his entire army for a second chance at life]]. To make a ''very'' long story short: [[CurbStompBattle it]] ''[[AnyoneCanDie does]]'' '''''[[RapeIsASpecialKindOfEvil NOT]]''''' [[DevouredByTheHorde end well]] for anyone not Griffith, the God Hand or the Apostles. The end result was so traumatic that there were only ''two'' survivors (who only lived thanks to [[BigGood The Skull Knight]]'s [[BigDamnHeroes timely intervention]] in an event that going by the God Hand's reaction had never happened before), one of which was [[RapeLeadsToInsanity driven to insanity from being raped by the newly-reborn Griffith]] and the other losing an arm, eye, and getting a [[JerkJustifications factory reset]] into becoming a textbook WoobieDestroyerOfWorlds in his [[RoaringRampageOfRevenge demon gore-soaked trail for revenge]]]].

* ''Manga/{{Berserk}}'' sees to it what is arguably one of ''the'' most infamous examples in all of manga with [[spoiler:[[TheBeautifulElite Griffith]]. [[JumpingOffTheSlipperySlope Over a gradual descent]] from [[FromNobodyToNightmare nothing into the monster he is now]], he [[EtTuBrute betrayed everyone he ever lead and cared for]] after [[BrokenAce wounding up broken in mind and body from a year of torture]], [[DeityOfHumanOrigin rejecting his humanity to ascend to godhood]] and [[HumanSacrifice brutally sacrifice his entire army for a second chance at life]]. To make a ''very'' long story short: [[CurbStompBattle it]] ''[[AnyoneCanDie does]]'' '''''[[RapeIsASpecialKindOfEvil NOT]]''''' [[DevouredByTheHorde end well]] for anyone not Griffith, the God Hand or the Apostles. The end result was so traumatic that there were only ''two'' survivors (who only lived thanks to [[BigGood The Skull Knight]]'s [[BigDamnHeroes timely intervention]] in an event that going by the God Hand's reaction had never happened before), one of which was [[RapeLeadsToInsanity driven to insanity from being raped by the newly-reborn Griffith]] and the other losing an arm, eye, and getting a [[JerkJustifications factory reset]] into becoming a textbook WoobieDestroyerOfWorlds in his [[RoaringRampageOfRevenge demon gore-soaked trail to revenge]].

* VillainProtagonist [[LightIsNotGood Light]] [[MagnificentBastard Yagami]] of ''Manga/DeathNote'' takes his first step into corruption and madness when he goes on a massive killing spree after receiving the [[ArtifactOfDeath Death Note]]. Of course, he is not a little kid at the time (he's [[TeensAreMonsters seventeen]]), he doesn't kill his family ([[spoiler: at least, not then]]), and he has a number of reasons for doing so (mostly because he's bored, disillusioned, and insane). That first week racked up a body count of five hundred.

* ''Fanfic/BoldoresandBoomsticks'': Ruby's account of Grendel's origin tells that it was once a normal Beowolf Alpha before losing its paw to a huntsman. It then organized the slaughter of everyone at a party except said huntsman, chased him to a village, and left only one survivor in the village to tell the story.
* With the last character imaginable in [[https://archiveofourown.org/works/28644663/chapters/70214727 Creation and Destruction]]; [[spoiler: Mt. Lady]] got turned into the HeroKiller Sinner, taking up Stain's [[HeelFaceTurn abandoned]] ideals and a fire axe... which she promptly used on Death Arms and her own production crew, live, ''on camera.''

* ''TabletopGame/Warhammer40000'' has Angron Primarch of the World Eaters. He was once a gladiator slave who along his fellow gladiators fought their way out to freedom against their Nucerian slavers. The Emperor sought him to join his crusade, but Angron refused, choosing to stay and die along side his brethren who are about to be cornered by the Nucerian armies. The Emperor then teleported Angron alone into his ship, leaving his fellow warriors to be slaughtered by the Nucerians. Angron never forgave the Emperor for what he did, when he became Primarch of the World Eaters his legion became the most brutal of them all, when Horus turned to Chaos he was one of the first Primarchs to join him, and soon became a Daemon Prince of Khorne. Indeed, when Angron was found by the slave traders who eventually sold him to the gladiatorial arena, he was naked, drenched in gore, and surrounded by the corpses of the Eldar assassination squad he'd butchered in self-defense when they attempted to murder him to pre-empt his falling to Chaos. He was just a little boy at the time.

--->'''Rumple:''' ''(SlasherSmile)'' You're safe, Bae. Do you feel safe, son?
--->'''Baelfire:''' ''(horrified)'' No...

* ''Manga/NegimaMagisterNegiMagi'': While the extent of her evil is ''[[NobleDemon very]]'' debatable, the infamous criminal mage [[TheArchmage Evangeline]] [[OurVampiresAreDifferent McDowell]] is implied but not outright stated to have killed her family when she had just turned 10 years old. Though it is heavily implied she was either not in control of herself when it happened or she wasn't conscious of it and only realized what she had done after she saw the corpses and the blood on her hands and mouth.

* ''Series/{{Arrow}}'': In "Promises Kept", we discover Slade Wilson's BackStory before he became Characters/{{Deathstroke}}. After getting off the island of Lian Yu, he decided to get out of active service for ASIS, working as a trainer instead. However seeing the news report that Oliver Queen was alive triggered his [[PsychoSerum Mirakuru-madness]]. When he snaps out of it, he realises he's slaughtered his fellow ASIS operatives with a katana.
* The ''Series/CriminalMinds'' episode "Haunted" begins with a man having a psychotic break at a pharmacy and killing a number of the other customers.

* ''WebAnimation/WhereWasMyHero'' shows a truly ''chilling'' types 1 and [[WhereIWasBornAndRazed 4]] example with none other than [[spoiler:[[VideoGame/SonicTheHedgehog Tails]], set in an alternate universe where he never meets Sonic]], his life gets worse and worse until he becomes an AxCrazy WoobieDestroyerOfWorlds with OmnicidalManiac tendencies.

* ''Manga/FullmetalAlchemist'': Scar began his serial-killing career by killing any and all available Amestrians [[spoiler:after waking up in a hospital to find that his entire family has been killed by Kimblee and that his [[BadassTransplant brother's arm has been grafted onto his body]] in the place of his own severed arm]]. He flipped out and started his rampage with [[spoiler:the Rockbells]], two Amestrian doctors who saved his life. While the slaughter is indeed his StartOfDarkness and he becomes an unrepentant murderer afterwards, he does actually regret this particular action even before [[spoiler:his HeelFaceTurn]] and acknowledges that the two doctors did not meet even his warped definition of guilty.
* ''Manga/MyHeroAcademia'': While [[spoiler:Tomura Shigaraki]] UsedToBeASweetKid, this came to an abrupt end when [[spoiler:his [[MakeThemRot Quirk]] activates for the first time [[TraumaticSuperpowerAwakening following a beating]] from his [[AbusiveParents abusive father]]. He [[AccidentalMurder accidentally kills]] most of his family, before becoming a SelfMadeOrphan by deliberately murdering his father. [[GreaterScopeVillain All For One]] finds him soon after this and decides to groom him to become the leader of the League of Villains, triggering his StartOfDarkness in earnest]].

* There's quite a few sympathetic starts of darkness in ''Manga/RurouniKenshin'', but the one closest to this trope is when [[StepfordSmiler Seta Soujirou]] murders his abusive relatives after they pushed him one time too many and ended up as TheDragon for a SocialDarwinist.
* Sometimes the bloodbath happens because [[BewareTheNiceOnes the person in question got pushed too far and snapped out]]. Just take a look at Lucy from ''Manga/ElfenLied'' and what she did to the [[KidsAreCruel cruel kids]] in her backstory for beating the puppy that she'd started caring for to death.
* Rob Lucci of ''Manga/OnePiece'' is a perfect example. His first mission as a [=CP9=] agent was given to him when he was only a kid; to save some hostages from pirates... he killed not only the pirates, but all the hostages as well, because they were getting in the way/didn't deserve to live. And he got a nasty-looking scar on his back in the process, which coincidentally looks like the World Government flag.
* While the extent of her evil is ''[[NobleDemon very]]'' debatable, [[TheArchMage Evangeline]] [[UndeadChild McDowell]] from ''Manga/NegimaMagisterNegiMagi'' is convinced that she underwent this. Extra credit though for three out of four points getting hit. She had just turned 10 when it happened. It is implied but not outright stated that she killed her family, and she had no reason to do so. Though it is heavily implied she was either not in control of herself when it happened or she wasn't conscious of it and only realized it happened after it happened.
* An '''extreme''' example occurs in ''Literature/FromTheNewWorld''. The anime deals with a new age of mankind in which humans have developed telekinetic abilities. Unlike most anime of this genre, this anime explores the more realistic possiblities that could happen if even just one person develops such powers. Boy K (no real name given) seemed to just be a quiet child, but psychological exams revealed disturbing [[TheSociopath sociopathic]] tendencies. No one knew what to do with him, but they waited too long. Eventually, in the middle of class, Boy K let go of his humanity and ''tore his teacher apart limb from limb''. He didn't stop there. He went on a full out rampage. Boy K slaughtered over 1,000 people ''on the first day '''alone'''''.
* VillainProtagonist [[LightIsNotGood Light]] [[MagnificentBastard Yagami]] of ''Manga/DeathNote'' takes his first step into corruption and madness when he goes on a massive killing spree after receiving the [[ArtifactOfDeath Death Note]]. Of course, he is not a little kid at the time (he's [[TeensAreMonsters seventeen]]), he doesn't kill his family ([[spoiler: at least, not then]]), and he has a number of reasons for doing so (mostly because he's bored, disillusioned, and insane). That first week racked up a body count of five hundred.
-->'''Ryuk:''' ...[[DeadpanSnarker You've taken quite a liking to it]].
* In ''Manga/FairyTail'', the [[GreatOffscreenWar Dragon King Festival]] of 400 years ago was this for [[TheDreaded Acnologia]], during which he JumpedOffTheSlipperySlope and [[WithGreatPowerComesGreatInsanity completely fell prey to his magic's darker influences]]. The end result was him indiscriminately killing friend and foe, human and dragon alike until he more or less wiped out the dragon race and turned into a dragon, crowning himself the "Dragon King".

* ''WesternAnimation/KungFuPanda'': Depending on [[BloodlessCarnage how much]] damage he actually did (it's ambiguous but he definitely at the very least endangered numerous civilian lives and caused a huge amount of property damage), Tai Lung when he learned he would not be the Dragon Warrior. In the sequel, Lord Shen heard a prophecy which implied that a panda would bring about his downfall and responded by conducting a genocide against the pandas, [[SelfFulfillingProphecy which ended up with baby Po in the Valley of Peace and ultimately set him on his path to the events of this film]].

* The villain in ''[[Film/TheAddamsFamily The Addams Family Values]]'' Deborah is murderous GoldDigger who's first murder is her own parents. The reason she burned their house down is that they gave her the wrong Barbie doll.
* The original [[Film/{{Halloween 1978}} Halloween]] is one of the greatest, most notorious examples of this trope across all media, playing it entirely straight and fulfilling all three conditions. Michael suddenly flipped and, for no good reason, killed his older sister. Eventually, Dr. Loomis concludes that there's nothing to him, except evil.

* ''Film/DraculaUntold'', Vlad himself, ''twice''; first when he first gains his vampire power and proceeds to CurbStompBattle an invading army, then when he [[spoiler: loses his wife]] and hits his DespairEventHorizon, he proceeds to do so ''again'', but not until after turning what's left of his people into vampires.

* In the Franchise/StarWarsLegends, the origin story of Palpatine/Darth Sidious involves him throttling his family and their bodyguards to death, and intending to at the very least kill his father since he was born due to hatred of him, and for no reason other than his family forbidding his contact with Plagueis, as revealed in ''Literature/DarthPlagueis''.

* ''Series/{{Arrow}}''. In "Promises Kept", we discover Slade Wilson's BackStory before he became Characters/{{Deathstroke}}. After getting off the island of Lian Yu, he decided to get out of active service for ASIS, working as a trainer instead. However seeing the news report that Oliver Queen was alive triggered his [[PsychoSerum Mirakuru-madness]]. When he snaps out of it, he realises he's slaughtered his fellow ASIS operatives with a katana.

* When ''Series/{{Angel}}'' first became the vampire Angelus, he proceeded to kill every single living person in his village in Galway, Ireland, starting with his own family.
* Ben Linus on ''Series/{{Lost}}'' got his Start of Darkness by assisting [[spoiler: the Others in poison-gassing all forty of the DHARMA Initiative settlers]]. He gets 2 1/2 bonus points: he killed his [[spoiler: father, making himself an orphan]]; he was a member of the community he destroyed; and he gets half a point for being barely out of his teens.

* ''TabletopGame/Warhammer40000'' has Angron Primarch of the World Eaters. He was once a gladiator slave who along his fellow gladiators fought their way out to freedom against their Nucerian slavers. The Emperor sought him to join his crusade, but Angron refused, choosing to stay and die along side his brethren who are about to be cornered by the Nucerian armies. The Emperor then teleported Angron alone into his ship, leaving his fellow warriors to be slaughtered by the Nucerians. Angron never forgave the Emperor for what he did, when he became Primarch of the World Eaters his legion became the most brutal of them all, when Horus turned to Chaos he was one of the first Primarchs to join him, and soon became a Daemon Prince of Khorne. Indeed, when Angron was found by the slave traders who eventually sold him to the gladiatorial arena, he was naked, drenched in gore, and surrounded by the corpses of the Eldar assassination squad he'd butchered in self-defense when they attempted to murder him to pre-empt his falling to Chaos. Did we mention he was just a little boy at the time?

* ''TabletopGame/EclipsePhase'' includes "The Lost Generation", an attempt at accelerated maturation GoneHorriblyWrong that are all assumed to be this. Several of the survivors of the program ARE this, but not nearly all of them.
* ''TabletopGame/SentinelsOfTheMultiverse'':
** Played straight with Citizen Dawn, whose first real experience with her powers killed a bunch of people and destroyed a library, and [[LackOfEmpathy she was mostly concerned with...the books.]]
** The first sign that [[EnemyWithin Dark Visionary]] was taking over the Visionary was when she murdered a bunch of scientists who were too close to discovering her secret.
** Spite's turn from a petty nuisance to a serious threat was cemented when he murdered two of the Wraith's best friends out of revenge.
** Inverted with Ambuscade, who began his HeelFaceTurn by teaming up with the more heroic Mainstay by wiping out most of a Mexican drug cartel - at the end of a villainous career where he ''risked'' plenty of lives, but basically never managed to actually ''take'' any.

* In ''[[VideoGame/FirstEncounterAssaultRecon FEAR]]'', Paxton Fettel fell into this trope as a kid during the so called "synchronicity event", during which he was possessed by Alma and killed several scientists using his psychic powers.

* ''VideoGame/FatalFrame'': [[spoiler:Kirie Himuro and Lord Himuro from ''VideoGame/FatalFrameI'', Sae Kurosawa from ''VideoGame/FatalFrameII'', and Reika Kuze from ''VideoGame/FatalFrameIII''. Except for Lord Himuro, all resulted directly from a botched sacrifice, and Himuro got the curse second-hand. They all suddenly engaged in mass-slaughter, and their victims became enraged, vengeful ghosts themselves who continued to claim victims decades or even centuries after.]]

* In ''VideoGame/{{Valis}} II'' (Japanese computer version), the origin story of Cruel King Megas is that, after being exiled by his kingly father, he returned to slaughter his entire family, tearing his brothers to pieces and eating his mother. Only his father's HeroicSacrifice, turning him into a SealedEvilInACan, prevented further bloodshed... until the seal was broken.
* ''VideoGame/TraumaTeam'''s CR-S01 unleashed a bioterrorist attack that killed everyone in Cumberland College, but with a twist - he has no memory of how or why he did it. [[spoiler:It turns out that he was actually framed by his adoptive father Albert Sartre.]]

* Most of the cast of ''VideoGame/TwistedMetalBlack'' has this as their backstory

* The Death Knight from ''VideoGame/FireEmblemThreeHouses'', or as he's more commonly known, [[spoiler:Jeritza Von Hrym,]] though his real name is [[spoiler: Emile Von Bartels]]. [[spoiler: His childhood as Emile wasn’t exactly nice, with his father using Mercedes' mother as a BabyFactory to create children that bear her Crest. When Mercedes and her mother escaped, an 11-year-old Emile chose to stay to protect them from their father’s wrath. Years later, when his father found where they were hiding, Emile was driven to murder his father and the entire House Bartels in a blind rage when his father learned Mercedes’ mother was too old to have children, choosing to use Emile’s sister Mercedes instead, who was still a teenager.]] While he feels no regret for these actions, the event was so traumatising that he began to become a full-on BloodKnight that would even kill [[spoiler: his big sister.]]

* They aren't all ''necessarily'' villains in the normal sense, but most times the first notice the world has of a new "Spark" (mad scientist) in ''Webcomic/GirlGenius'' is the total depopulation of some village, usually that of the Spark.
* ''Webcomic/DanAndMabsFurryAdventures'' has a relatively sympathetic example in Regina Darkblood, who accidentally kills an innocent civilian and then kills several adventurers because of a tragic case of the universe's equivalent of MistakenForPedophile.

* Revealed by WordOfGod to be true of ''WesternAnimation/GravityFalls''[='=]s BigBad, the interdimensional, omnicidal [[GreatGazoo all-powerful whackjob]] Bill Cipher. He originally lived in a parody of Literature/{{Flatland}}, but somehow gained [[PhysicalGod phenomenal cosmic power]], [[WithGreatPowerComesGreatInsanity went nuts as a result]] and literally ''[[OmnicidalManiac set his entire dimension on fire]]'', his own family included. With his homeworld reduced to a void, Cipher then hopped through other dimensions, secretly planning to destroy each and every one in the same way.

* He's actually the protagonist (one hesitates to say "hero") rather than the villain a lot of the time, but ComicBook/{{Lobo}}'s origin story involves him killing off his entire ''race'' except for himself, because he was dissatisfied with the grade he received on a school project. PlayedForLaughs, since Lobo was originally a DeconstructiveParody of the NinetiesAntiHero.

* ''WesternAnimation/KungFuPanda'': Depending on [[BloodlessCarnage how much]] damage you think he did (it's ambiguous), Tai Lung when he learned he would not be the Dragon Warrior. In the sequel, Lord Shen heard a prophecy which implied that a panda would bring about his downfall and responded by conducting a genocide against the pandas, [[SelfFulfillingProphecy which ended up with baby Po in the Valley of Peace and ultimately set him on his path to the events of this film]].

* A [[KillEmAll No Mercy]] run in ''VideoGame/{{Undertale}}'' starts out like this, with the player being required to track down every RandomEncounter in the stage and kill them.

* ''Series/{{Arrow}}''. In "Promises Kept", we discover Slade Wilson's BackStory before he became [[Characters/BatmanDeathstroke Deathstroke]]. After getting off the island of Lian Yu, he decided to get out of active service for ASIS, working as a trainer instead. However seeing the news report that Oliver Queen was alive triggered his [[PsychoSerum Mirakuru-madness]]. When he snaps out of it, he realises he's slaughtered his fellow ASIS operatives with a katana.

* Revealed by WordOfGod to be true of ''WesternAnimation/GravityFalls''[='=]s BigBad, the interdimensional, omnicidal [[GreatGazoo all-powerful whackjob]] Bill Cipher. He originally lived in an {{Expy}} of Literature/{{Flatland}}, but somehow gained [[PhysicalGod phenomenal cosmic power]], [[WithGreatPowerComesGreatInsanity went nuts as a result]] and literally ''[[OmnicidalManiac set his entire dimension on fire]]'', his own family included. With his homeworld reduced to a void, Cipher then hopped through other dimensions, secretly planning to destroy each and every one in the same way.

* ''Fanfic/TheFlashSentryChronicles'' has an example that combines Types 1, 2, and 4. Shadow Corrupter was originally a kind unicorn by the name of "Gleaming Path", but on his thirteenth birthday he discovered that his parents and most of the villagers of Weeping Wood Hallow are part of a cult that worships the Corrupted Shadow, and plan to use him in a [[HumanSacrifice sacrificial ritual]] to revive it, since his birthday was born on the day that the Corrupted Shadow was killed. He ends up being put through the ritual against his will, which included being cut multiple times by daggers. Ultimately, the ritual was a success and he was revived, now granted with his powers, [[BeCarefulWhatYouWishFor but he immediately took his revenge on the cult]], destroying the entire village and everyone in it for what they did to him, and not just the members of the cult but the ''entire'' village, including all his friends.