History Main / Omnicidalmaniac

* Dr. Blight from ''WesternAnimation/CaptainPlanetAndThePlaneteers'' talks about wanting to actively destroy the planet in some episodes but her goals change from episode to episode.
** It was fairly heavily implied that, unlike the rest of the show's villains (who were merely greedy for power or wealth), Blight was actually completely insane -- she was certainly the only one pursuing pollution ''for its own sake''. Or ForScience for that matter.

** Season 5 reveals why: the Lich is the by-product of [[FantasticNuke a magical nuke]] used during [[WorldWarIII the Mushroom War]] and [[WasOnceAMan thehuman]] in the epicenter. The Lich is effectively a sentient weapon of mass destruction continuing its mission.

* The [[AbsoluteXenophobe Highbreed]] from ''WesternAnimation/Ben10AlienForce''. They believe themselves to be higher than all other life forms as well as the first race to achieve sapience (despite having no proof), and after they rendered themselves sterile through [[InbredAndEvil generations of inbreeding]] they couldn't stand the thought of being outlived by the other races. As a result, they decided to [[TakingYouWithMe take everyone else in the universe with them]] until Ben intervened.

* From ''WebAnimation/{{Glitchtale}}'' is the GreaterScopeVillain of both Seasons one and two, HATE. HATE desires nothing more than complete destruction of everything and slowly kills it's host while gaining/enhancing all of their magic and abilities. It's only weakness is it's antithesis, [[ThePowerOfLove love]]. ([[NamesTheSame The emotion not LOVE]])

* In ''WesternAnimation/DarkwingDuck'', there was the short-lived superpowered galvanized Negaduck (not to be confused with the [[NamesTheSame similarly-named]] EvilCounterpart to Darkwing who later appeared, the one with the yellow-red-black uniform).

** [[https://scp-wiki.wikidot.com/scp-682 SCP-682]] is a strange, seemingly-reptilian "creature"―the term "creature" can be used only loosely, as it doesn't seem to be alive in the sense we usually think of―that considers all living things disgusting sub-beings that must be destroyed. Well, all of them except CreepyChild [[https://scp-wiki.wikidot.com/scp-053 SCP-053]], which it was discovered to be oddly fond of. No one's quite sure why it reacts differently to SCP-053―and they're too scared to take advantage of it, as keeping an Omnicidal Maniac prone to fits of UnstoppableRage and a toddler that induces UnstoppableRage then instantly kills anyone that hurts it in the same room seems like a bad idea. His reasons for this hatred for all life aren't directly stated but are implied to be a ''really'' extreme version of HumansThroughAlienEyes. This has become sort of a RunningGag, as the Wiki/SCPFoundation's researchers are so afraid of 682 that they're constantly trying to find some way to kill him, no matter how insane.

* ''Wiki/SCPFoundation'':

** The Brains. These unbelievably powerful, [[MindRape mindraping]] giant brains appeared in this universe milliseconds after it came into being. Their one goal is to gather all of the information in the universe, then ''destroy'' it so that no new information will ever appear. The only real opposition against them comes from the {{Precursors}}, the Nibblonians. Unlike typical PlanetLooters, the Brains actually ''enjoy'' their omnicidal campaign. The Brains are Brainiac from the DCAU but they're a ''race'', not just one evil AI. Thanks to there being no Franchise/{{Superman}} to fight them, the Brains come close to succeeding. Luckily for humanity, Fry was immune to their mind powers. [[RewritingReality Then he made them leave the Earth for no ''[[RougeAnglesOfSatin raisin]]!''

* Lord Dominator from ''WesternAnimation/WanderOverYonder'' admits (in [[VillainSong song]]) midway through the second season that she doesn't actually want to rule the galaxy and instead wants to destroy all of its planets ForTheEvulz.

[[caption-width-right:300:Kill them all. No sorting necessary.]]

** The Chaos faction known as the Purge believe the only way to save the galaxy is to kill everything in it. They believe themselves to still be pure; their victims would disagree if they were in any state to do so.
** Likewise, the Chaos faction known as the Crimson Slaughter embark on massive killing sprees for the sheer sake of carnage, because these Renegade {{Space Marine}}s are afflicted by a curse that causes them to be haunted by the ghosts of their victims. Only slaying fresh victims can quiet the voices that will otherwise drive them insane; the bloodier the massacre, the longer the reprieve they get before the voices come back.
** Chaos likes to do this, doesn't it? At least Purge made occasional truces with other Chaos Forces (Vraks, anyone?). Sons of Malice is a Renegade Space Marine chapter that worships minor Chaos God Malice. He represents the aspects of Chaos fighting Chaos, meaning that his followers will attack any Chaos force on sight. They also attack any non-Chaos force on sight, but its kind of normal for Chaos.

* O'Malley, the BigBad of ''Machinima/RedVsBlue'', is an over-the-top parody of this trope. His goal is to take over the universe and "''crush every living soul into dust''. Um, except for you, Vic. You can be assistant crusher."

* ''WesternAnimation/TheJimmyTimmyPowerHour'':
** Professor Calamitous creates a bomb using Jorgen's magic to blow up the universe in ''When Nerds Collide''.
** Shirley creates two expanding red vacuums that would have destroyed both Timmy and Jimmy's universes in ''The Jerkinators''.

** He also intended to destroy every computer hooked up to the internet, believing that it would destroy society (not being sure whether humans were directly or indirectly dependent on computers). However, [[spoiler: The Seer]] really takes the cake, not just wanting to destroy Earth, but believing that with all the stars and planets out there, there HAS to be life on some of them. So when he's done with Earth he will travel to one of those and kill everything there...

** [[BigBad Xykon]] freely admits he might fall into this himself if he gets bored enough, though at the moment he's just an EvilOverlord.

* ''Fanfic/BringMeToLife'': [[spoiler: [[UltimateEvil The First's]] endgame is to use a [[WhenThePlanetsAlign cosmic alignment]] known as the Awakening to access the Eye of Creation and use its raw power to destroy TheMultiverse. Then, it intends to create a new reality in its own image.]]

* One of the [[Anime/PrettyCure Precure]] villains, [[Anime/SmilePrettyCure Joker]], graduates from a HopeCrusher to an Omnicidal Maniac in the CrossOver ''Fanfic/ShatteredSkiesTheMorningLights''. Losing his faith in his creator, dying, meeting the UltimateEvil in the afterlife, learning of the existence of a whole [[TheMultiverse Multiverse]] of {{MagicalGirl}}s, and being resurrected [[AxCrazy does a number on his already-questionable sanity]].

* [[UltimateEvil Crayak]] from ''Literature/{{Animorphs}}''. Even before he became [[EldritchAbomination something that can't be properly described in any language]], he destroyed planets and drove species to extinction purely because [[ForTheEvulz it amused him]]; after his ascension, he now seeks to pit all species against each other until there's only one left, which will worship him as their god.

* Myth/NorseMythology has most of the frost giants, as well as Jormungandr and Fenrir head in this direction during [[TheEndOfTheWorldAsWeKnowIt Ragnarok]]. Skoll and Hati, the wolves who seek to devour the sun and the moon are also examples. The two worst, however, are Surtr, King of the Fire Giants and Lord of Muspelheim, and [[UltimateEvil Nidhoggr]]. Surtr will lead the sons of Muspel against the Aesir at Ragnarok, slay Frey (who by this point is one of the few gods still standing), [[HeroKiller slaughter the remaining Aesir]], and then set the world itself ablaze. Nidhoggr, in the meantime, is a massive and utterly evil dragon who sits at the roots of [[WorldTree Yggdrasil]] and tries to bring the entirety of creation down into oblivion. It will finally succeed during Ragnarok and, what's worse, ''survive the end of the world''.

* [[spoiler:The Pa'anuri]] from ''Webcomic/SchlockMercenary''... [[UltimateEvil Possibly]]. 'Attempted destruction of all Baryonic matter in the Milky Way' certainly qualifies them for the trope, motivated by [[spoiler:Baryonic entities (sentient life forms) using transportation lethal to them.]] Once communication can finally be established, they turn out to believe [[spoiler:they're one side in a GuiltFreeExterminationWar because they're convinced the Baryonics need the teraport and, thanks to either BlueAndOrangeMorality or simple sociopathic tendencies, ''cannot understand'' they might come to a different arrangement]].

* ''Fanfic/DungeonKeeperAmi'': Crowned Death's cult revolves around decrying 'the blight that is life' and celebrating 'the beauty of death, the end of existence'. Mukrezar, upon his resurrection, notes tongue-in-cheek that Crowned Death's followers continue to spread that very message... even after death. Mukrezar himself probably qualifies, though his antics seem to be more motivated by ItAmusedMe than any desire for destruction itself.

* The title villain in ''Film/{{Warlock}}'' tries to collect the [[TomeOfEldritchLore Grand Grimoire]] to reverse God's work and unmake creation itself to advance himself in Satan's eyes.

* ''Webcomic/EightBitTheater's'' Black Mage. Every other strip at least mentions his desire to kill everything in existence just for the heck of it. Luckily, as WordOfGod says, the universe exists to make Black Mage's life a living hell. Considering how [[spoiler: when he died, he became the King of Hell and every single high powered magician and wizard alive immediately got the OhCrap signal from the universe about how the end of all reality was coming]], the universe has been incredibly careful since to make sure that he ''never'' gets in that position again. Considering that this means keeping him alive (as his physical body acts as a RestrainingBolt), this means A) [[IronButtMonkey he has survived a lot of things that he probably shouldn't have]] [[note]]like Australia dropping on him[[/note]], and B) his body count keeps climbing. So every once in a while [[CosmicPlaything the universe seems to like to even the score]]. [[UpToEleven A lot]].

** SCP-682 is a strange, seemingly-reptilian "creature"--the term "creature" can be used only loosely, as it doesn't seem to be alive in the sense we usually think of--that considers all living things disgusting sub-beings that must be destroyed. Well, all of them except CreepyChild [[https://scp-wiki.wikidot.com/scp-053 SCP-053]], which it was discovered to be oddly fond of. No one's quite sure why it reacts differently to SCP-053--and they're too scared to take advantage of it, as keeping an Omnicidal Maniac prone to fits of UnstoppableRage and a toddler that induces UnstoppableRage then instantly kills anyone that hurts it in the same room seems like a bad idea. His reasons for this hatred for all life aren't directly stated but are implied to be a ''really'' extreme version of HumansThroughAlienEyes. This has become sort of a RunningGag, as the Wiki/SCPFoundation's researchers are so afraid of 682 that they're constantly trying to find some way to kill him, no matter how insane.
** [[https://scp-wiki.wikidot.com/scp-1370 SCP-1370]] has the ''attitude'' of an Omnicidal Maniac. Its ability to ''do'' anything about it, [[IneffectualSympatheticVillain however]]...
** [[https://scp-wiki.wikidot.com/scp-076 SCP-076-2, "Able"]], will kill anything and everything on sight for fun. The Foundation's attempt to weaponize Able went [[GoneHorriblyWrong horribly wrong]] because they treated him like a human being and not the superpowered murder machine shaped like a human that he really is.

* Ivo Shandor in the ''Franchise/{{Ghostbusters}}'' franchise. The founder of the Cult of Gozer, he went mad after World War I convinced that humanity had no redemption and created a cult with the sole purpose of causing the apocalypse by bringing [[PlanetDestroyer Gozer]] into our world.

* ''WesternAnimation/DannyPhantom'' becomes this in an [[BadFuture alternate future]]. Most fans certainly see it that way. Fortunately, this is averted... hopefully. It's made pretty clear that even though the exact circumstances of the change were averted, it's still possible.

* [[spoiler:The Pa'anuri]] from ''Webcomic/SchlockMercenary''...[[UltimateEvil Possibly]]. 'Attempted destruction of all Baryonic matter in the Milky Way' certainly qualifies them for the trope, motivated by [[spoiler:Baryonic entities (sentient life forms) using transportation lethal to them.]]

->''"Life... Dreams... Hope... Where do they come from? And where do they go...? Such meaningless things... I'll destroy them '''''all!'''''"''
-->-- '''Kefka Palazzo''', ''VideoGame/FinalFantasyVI''

** The sequel series, ''WesternAnimation/TheLegendOfKorra'' has [[BigBadDuumvirate both]] [[ArcVillain Arc Villains]] of Season 2, [[AGodAmI Unalaq]] and [[SatanicArchetype Vaatu]] be this. Ozai would kill off the population of most of the world, Unalaq and Vaatu, or UnaVaatu, straight up sought the end of all life on the planet by giving it a rebirth and plunging it into darkness and suffering for the next 10,000 years to recreate it in his image.