->'''Jane:''' Don't fall for it, Jack.\\
'''Jack:''' Fall for what?\\
'''Jane:''' For the lie we keep telling ourselves. We do the dirty stuff to get the power. It'll give us all the good things we really want. Then we get the power, we can't even remember what goddamn thing what it was we wanted it for in the first place.
-->-- ''Head Office''

The character is an explicit good guy. Either in order to achieve a goal, or by being forced into doing so by someone else, they [[IDidWhatIHadToDo do what needs to be done]]. The ByTheBookCop beats a confession out of the SerialKiller who will go free otherwise. TheParagon uses their SuperpoweredEvilSide to defeat an invincible foe. The WhiteMage breaks their oath to never use [[LightEmUp the power of light as a weapon]].

Taking such a morally grey action is a technically neutral action, and in theory, it should be possible to use it to achieve the goal in question without permanently crossing the MoralEventHorizon. But TheDarkSide being The Dark Side, it doesn't work like that. By its very nature, EvilFeelsGood, and there are few highs like being DrunkOnTheDarkSide. ItGetsEasier and easier to choose the dark side. The hero begins SlowlySlippingIntoEvil, and eventually, they will be a completely different person from before they crossed this line.

The FallenHero starts [[KickTheMoralityPet Kicking The Morality Pet]] and JumpingOffTheSlipperySlope. And when called out on this, [[ThenLetMeBeEvil they may simply embrace their new role as villain]].

This is a fairly common method of enacting a FaceHeelTurn or making an [[SympathyForTheDevil evil character sympathetic]] -- but not too sympathetic -- as in a sense it makes the evil character themselves a victim of evil. Sure they had a good reason, at some point. But not anymore. In a particularly bad case, the character might not even remember what their original motive was, and substitute the old goal with explicitly evil ones. The redeemable ones can [[IKnowYoureInThereSomewhereFight usually be reminded at the last minute]], or [[HeelRealization sometimes]] they [[MyGodWhatHaveIDone figure it out for themselves]] -- though they [[IgnoredEpiphany may still keep going]]. Often the [[JustifiedTrope justification]] for MotiveDecay.

Compare to HeWhoFightsMonsters. Related to TheCorruption, DarkIsEvil and BadPowersBadPeople (especially when it starts out as BadPowersGoodPeople).


[[folder:Anime & Manga]]
* ''Manga/DeathNote'': While Light Yagami starts out killing criminals with the idea of it bringing about justice, he starts to slip once the authorities get on his case, as he begins to kill innocent people for merely getting in his way. It gets worse after the TimeSkip, where he has fully bought into the idea of [[AGodAmI being the God of his own new world]], and he is beginning to seriously entertain the idea of also expanding his definition of "undesirables" to people who are committing the "crime" of being unproductive to society.
* ''Manga/{{Naruto}}''
** Sasuke is a poster child for this. While he was always firstly driven by his wish to take vengeance upon his brother for murdering their family, his time in Konoha made him connect to the members of his team. The lure of revenge was too great, until he decided to break those ties. [[spoiler:[[MotiveDecay His motives have rapidly degenerated]] after joining with Madara. Initially after learning of the truth behind his brother's murder of his clan, Sasuke simply wanted revenge against the Village Elders who manipulated him. Now he won't settle for anything less than the complete genocide of anyone who lives in Konoha. There's some hints that Sasuke is being influenced by something (Madara claims the Uchiha bloodline is TheDarkSide), probably an AuthorsSavingThrow given that during the summit arc he rather suddenly turns into a cardboard villain after gaining Susanoo (amongst other things, he abandoned another set of teammates that he seemed to care about earlier, who in the previous arc had saved him from being killed)]].
** Orochimaru was revealed to be a victim of this. The horrors of war and realization of his own mortality gradually twisted his dream of living long enough to meet his reincarnated parents into a tangible goal of discovering immortality.
* Possibly [[spoiler:Gin Ichimaru]] from ''Manga/{{Bleach}}''. It seems he originally started [[spoiler:plotting to kill Aizen as revenge for his underlings attacking Rangiku in her youth.]] Now over a century later [[spoiler: he still tried to kill Aizen, but he was willing to wound Rangiku to accomplish that.]] He seems to have lost track of himself a ''long'' time ago. This may be a fusion of TheDarkSideWillMakeYouForget and BecomingTheMask, though. Hundred years of undercover that's actually pretty fun will do that to you.
* Ralph Werec from ''Anime/StrainStrategicArmoredInfantry''. Even as he constantly reminds himself of why he defected from the Union, he moves further and further away from his goal of vengeance and closer to being an OmnicidalManiac, and by the end of the series, he has turned against the very people he was trying to atone to.
* In ''Manga/{{Claymore}}'', overusing your power will transform you into a monster who forgets that eating human entrails is quite rude. The reason that a Claymore tends to overuse her power is often to protect people from monsters much like these.
** That being said, some of these monsters (called awakened beings in-universe) - particularly if they're powerful or important enough - retain much or most of their knowledge, up to even trying to maintain friendly relationships with their loved ones in some cases (though this only seems to work out when the loved ones in question become awakened beings as well). At least one has established a fatherly connection to younger characters (including a normal human, which seems like the only food awakened beings like) a very long time ''after'' his transformation. Even then, though, he continued to be an evil bastard not far from an OmnicidalManiac [[spoiler: including of his own kind.]]
* In ''Anime/PrettySammy'', Misao Amano is an evil magical girl aiming to ruin the balance between good and evil. When she transforms into a form concerned with expressing the negative, repressed parts of her personality, however, she simply does things ForTheEvulz and lose sight of her original goal completely.
* Chirin the lamb from ''Anime/RingingBell'' originally seeks out the wolf who killed his mother with the intent of revenge, but finds he is far too weak. Instead, he asks to become the wolf's apprentice, with the intention of killing the wolf once he's taught him all he knows. The years pass, and Chirin grows into a monstrous ram. He forgets his mother, forgets his mission, forgets he was ever a sheep at all. Its not until they eventually return to Chirins former home at the farm where the wolf wants him to kill the sheep that Chirin finally remembers. [[RedemptionRejection But by then its far too late...]]
* ''Anime/DragonBallSuper'': Originally, Zamasu just wanted the gods to be more involved with mortal affairs so they would stop misusing the knowledge giving to them by the gods. At worst, he wanted the gods to stop protecting mortals since [[HumansAreBastards they're not worth it]]. After he meets and fights Goku, however, he goes off the deep end and decides that mortals are foolish ''and'' dangerous and need to be destroyed for the peace of the universe. [[spoiler:To that end, he kills his own master, takes his Time Ring, uses the Super Dragon Balls to take Goku's body, and murders him and his family [[EvilIsPetty out of spite]]. By the time Zamasu (now Goku Black) reaches Earth, he's wiped out all the gods in the future timeline, is clearly insane, and sees himself as the one true god of TheMultiverse along with Future Zamasu.]] Whatever nobility he may have had in his goals is long gone.

* In IDW's ''[[ComicBook/TheTransformersIDW Transformers]]'' continuity, the Decepticons started out as heroic freedom fighters rebelling against the corrupt Senate. But after they overthrew the Senate, Megatron slowly became convinced that he and ''only'' he was right, resulting in the Decepticons becoming conquerers. That coupled with Megatron's [[FantasticRacism bigotry towards organic races]] and his emotional and mental manipulation of his soldiers, resulted in the Decepticons fighting for the same type of oppression that they were born to overthrow.
** A major part of Megatron's HeelFaceTurn in ''ComicBook/TheTransformersMoreThanMeetsTheEye'' comes from him realising this had happened to him and working to grow beyond it.
--->'''[[spoiler:Terminus]]:''' What's happened?\\
'''Megatron:''' Nothing. Everything. I lost my way.
* In ''ComicBook/OldManLogan'', Magneto (the holocaust victim) works with Red Skull (the Nazi) to bring down the heroes of the Marvel universe alongside other super-villains.
* ''ComicBook/BatmanVampire'': Batman goes through this in the final part of the trilogy, ''Crimson Mist'', after succumbing to SanitySlippage and his vampire nature. As he falls deeper and deeper into corruption, he reflects that he can no longer understand the {{Heroic Sacrifice}}s of his female allies from ''Red Rain'' and ''Bloodstorm'', Tanya and Selina Kyle, respectively, now regarding them as foolish actions rather than selfless and noble.

[[folder: Fan Works]]
* Simba in ''Fanfic/TheLionKingAdventures''. He goes from a sweet, mischievous cub to an [[spoiler: evil, vicious killer. Initially, he's doing it to try finding a way to bring back the destroyed Pride Lands. However, it soon turns into a desire to become the greatest predator.]]
* [[spoiler: Nightmare Phobia]], the BigBad of the ''Fanfic/PonyPOVSeriesChaosVerse'', gets hit with this hard. Being that she was created from [[spoiler: [[EnemyWithout the remnants of Nightmare Moon's essence]]]], she's naturally driven by a hatred of Celestia/the Mane Six and a desire to rule Equestria. However, as she grows more powerful, her memory becomes corroded, and she starts to forget ''why'' she hates the heroes, just that she does, and becomes obsessed with tormenting them, ultimately trying to kill them. And then, when she undergoes her OneWingedAngel transformation by absorbing the [[EldritchAbomination Shadows of Oblivion]], she goes [[VillainousBreakdown completely insane and delusional]]; she becomes convinced the heroes attacked her unprovoked, and that the only logical reaction to this is to ''[[OmnicidalManiac kill everything in Equestria]]''.
* The original ''FanFic/PonyPOVSeries'' has a major example in the [[BadFuture Dark World Series]]. [[spoiler: It turns out that Discord has long been trapped in a GroundhogDayLoop by the true BigBad, [[KnightTemplar Nightmare Eclipse/Paradox]], the original Dark World!Twilight, who went [[SuperPoweredEvilSide Nightmare]] in order to trap Discord in the time loops in order to torment him forever in an IronicHell. The thing is, her original intent before the corruption was to [[SetRightWhatOnceWentWrong undo all the evil performed by Discord]], but she lost sight of that in her obsession to [[RevengeBeforeReason gain revenge on him]]; by the time she's revealed, she's [[OmnicidalManiac wiped out Dark World and everything in it]] ''several billion times'', seeing everyone but Discord and Twilight as nothing but props, becoming [[EvilerThanThou far worse than Discord]] (who himself had a HeelRealization at some point) in the process.]]
* In ''Fanfic/HopeForTheHeartless'' (in which [[Disney/TheBlackCauldron the Horned King]] is [[ResurrectedForAJob brought back to life]] and half-forced on [[ImpossibleTask a seemingly impossible]] RedemptionQuest), it's revealed that the [[OurLichesAreDifferent lich]] ([[ReallySevenHundredYearsOld who has existed over a thousand years]]) has forgotten many things from his past in his centuries lasting quest to find [[ArtifactOfDoom the Black Cauldron]] in order to TakeOverTheWorld, viewing memories to be [[PragmaticVillainy a distraction]]. He doesn't remember how to feel because his heart died out with the countless sins he committed, or the reason he wanted to conquer the world in the first place, or who he was before becoming [[EvilMentor Arawn's]] apprentice. However, over the many months he spends with his MoralityPet, [[LivingEmotionalCrutch Avalina]], he gains some flashbacks from his past and [[WhatIsThisFeeling starts feeling]] [[FirstTimeFeeling positive emotions again]], [[spoiler:even regaining his heart]].
* In the backstory of ''FanFic/AgesOfShadow'', [[WesternAnimation/JackieChanAdventures Jade]] absorbed the power of the Shadowkhan in order to save her family from a villain known as the [[TheChessmaster Magus King]]. But the process was irreversible, and after some time she became corrupted and tried to TakeOverTheWorld herself, leading to her being [[SealedEvilInACan sealed away]]. Now, [[TimeAbyss countless centuries later]], she's now lost large chunks of her memory.
* Downplayed in ''Fanfic/WithThisRing''. [[spoiler: Paul]] merges with the Ophidian to save his friends and while [[spoiler: Paulphidian]] is still largely benevolent and supports the good guys, they cannot feel any emotion besides Avarice and so they longer understand why they are so attached to them. They have completely forgotten what feeling emotions are like.

[[folder:Films -- Animation]]
* ''WesternAnimation/{{Bionicle}} 3: Web of Shadows'': Roodaka takes advantage of Toa Vakama's mutation into a bestial state and promises to make him the ruler of his former city. After a while, Vakama abandons the "Toa" part of his name (meaning "hero") and forgets why he and his team even came to the city: to rescue its Matoran population. Later still, he becomes Roodaka's pawn and turns into an animalistic underling, until one of his team members hits a nerve in the deepest part of his sense of duty and reminds him of their quest.
* ''Disney/TheLionKingIISimbasPride'': Upon Nuka's death, it's implied by [[BigBad Zira's]] reaction to it that she ''did'' genuinely love her kids, but is [[RevengeBeforeReason so obsessed with getting revenge on Simba for Scar's demise]] that she's lost sight of that.

[[folder:Films -- Live-Action]]
* ''Franchise/StarWars'': Anakin Skywalker himself from the prequel trilogy joins the Dark Side in ''Film/RevengeOfTheSith'' in order to [[LoveMakesYouEvil save his wife from dying]]. Then he starts killing [[WouldHurtAChild younglings]] and things go downhill from there. When he force-chokes Padmé Amidala, the wife in question, it solidifies him into this trope.
* ''Film/StarTrekGenerations''. Soran. He lost his family to the Borg, and eventually ended up killing hundreds of millions of beings just to enter The Nexus. When Picard tries to use the memory of his family to convince Soran to stop his plan, he pauses and looks distraught... then [[SmugSnake smirks]] and replies, "Nice try." This, implying that he knows this trope is in effect and just doesn't care, makes him ''less'' sympathetic.
* The titular character of ''Film/WeNeedToTalkAboutKevin'' invokes this:
-->'''Eva:''' I want you to tell me...''why''.
-->'''Kevin:''' I used to think I knew. Now, I'm not so sure.

* Affects all the kids in ''Literature/{{Animorphs}}'' to some degree. Rachel in particular, as she can't remember what she was like before the war started.
* ''Literature/TheWheelOfTime'' has an odd example in protagonist Rand Al'Thor. After he [[spoiler:channels the True Power, which is derived directly from the Dark One (the series' UltimateEvil)]], he undergoes an [[JumpingOffTheSlipperySlope immediate personality change,]] becoming incredibly paranoid, very harsh toward anyone who he perceives as threatening or even disagreeing with him, and abandoning his previous [[WouldntHitAGirl refusal to kill or harm a woman]]. However, the extraordinarily stressful circumstances surrounding [[spoiler:his use of the True Power]] could be considered explanation enough without resorting to this trope -- he had been undergoing SanitySlippage for upwards of six books -- and it may even be considered a subversion considering that he pulls a complete 180 back to the side of good after an epiphany later in the same book.\\\
It's outright stated by Rand that the reason he... freezes on the inside is because now he has (against his will, but that doesn't seem to matter to him) lucidly attempted to murder ([[BattleHarem one of]]) the woman he loves. The scenario is laid out in this passage(probably to preemptively [[AvertedTrope avert]] people thinking it was the True Power):
-->''Or..no. That numbness had nothing to do with the power he'd held. He turned around, looking down at Min, who coughed quietly and rubbed her neck. She looked up at him, and seemed afraid. He doubted that she would ever see him the same way again.\\
He had been wrong; there ''had'' indeed been something more that Semirhage could do to him. He had felt himself killing one he loved clearly. Before, when he'd done it as Lews Therin, he had been mad and unable to control himself. He could barely remember slaying Ilyena, as if through a clouded dream. He'd realized what he had done only after Ishamael had awakened him.\\
Finally, now, he knew precisely what it was like to watch as he killed those he loved.''
* [[spoiler:Severus Snape]] from ''Literature/HarryPotter'' is a good example. He started out as a [[NoSocialSkills socially awkward]] but well-meaning young boy who desperately craved friendship, but due to his increasing bitterness over being bullied by [[JerkJock James Potter]] and his gang, as well as the influence of his [[FantasticRacism highly prejudiced]] friends, he began to become more accepting of Dark Magic and eventually called [[spoiler:Lily Evans]] (the only person who truly cared for him) a mudblood, alienating her from him, while (according to WordOfGod) his desperate desire for friends led him to become a Death Eater.
* ''Literature/TheDresdenFiles''
** The FBI agents in who became ''[[OurWerewolvesAreDifferent hexenwulfen]]'' to take down Marcone are described in these terms, their original goal buried under the evil influence of the belts. Harry briefly experiences it for himself when he uses the belt just once.
** Also many of the Denarians.
** In ''Literature/{{Changes}}'', after [[spoiler:Harry takes on the mantle of the Winter Knight]], Sanya tells him there is ''always'' a way back to the light so long as he ''doesn't'' forget what he was fighting for.
* In Creator/JRRTolkien's ''Literature/TheLordOfTheRings'', Gandalf refuses to take the Ring for this reason. During the Council of Elrond, Elrond states that anyone using the Ring to overthrow Sauron would only create a new Dark Lord in his place. This is even implied to happen to BigBad Morgoth and [[TheDragon his lieutenant]] Sauron: The former started out just wanting to create something of his own, and devolved into wanting to kill everything. The latter felt the world would be a better place with the imposition of his order, and then just wanted the power that came with ruling. As you can see, this is a major theme in Tolkien's works likely due to his own religious views.
* Jacen Solo in ''Literature/LegacyOfTheForce'' (part of the StarWarsExpandedUniverse) ends up this way as a result of the philosophical growth he goes through that's necessary [[FamilyUnfriendlyAesop to save the galaxy without committing genocide]]. Twice invoked, as another reason he started down that path was because of a vision in which he and Luke fight to the death. Naturally, by the end he no longer cares if Luke dies.
* In the ''Series/StarTrekTheNextGeneration'' novel ''Captain's Honor'', this happens to Lucius Sejanus, who, starting as someone merely wanting glory, [[spoiler: tries to start the war with M'Dok and is willing to destroy the Enterprise for it.]]
* In Creator/GuyGavrielKay's ''Literature/{{Tigana}}'', a woman infiltrated a court in order to kill the king. But she worked so hard at the infiltration that when she actually got a chance to kill him, she saved his life, and after that she actively helped him.
* In John Marco's ''Tyrants and Kings'' trilogy, this applies to Emperor Arkus and all his top lieutenants. In the beginning of his Black Renaissance they signed on to [[UtopiaJustifiesTheMeans establish order and civilization on a continent wracked with war and devastation]]. But decades of conquest and immortality has corrupted them all, to the point everyone realizes they are irredeemable.
* In, ''Extreme Prejudice'', a story in Creator/JerryPournelle's "High Justice" universe, an assassin is sent to an underwater research community to kill a defector. Over the course of the story, he realizes the defector has built a happy, productive life for himself and his family -- and this just makes the assassin hate the defector even more; ''he'' has sacrificed any and all hope for a normal life in order to carry out his missions. It's when he discovers the reason for the defection that he realizes the trope is in effect; [[spoiler:the President ordered the defector to kill his Solicitor General just as he began investigating his office for Mafia ties. He defected instead of killing a cop to protect a crooked politician -- and warned the cop first]].
-->'''Defector:''' ''You canít admit you're wrong. Youíve spilled too much blood for the cause. Admit you're wrong and you're a monster. I know. I '''know.'''''\\
'''Assassin:''' (In my business you do your job and that's all. ...you can't question your orders. If the people at the top don't know what they're doing, if it isn't worth it, what are you? A god-damned hired killer, a criminal, and I'm not that, I'm a patriot. A soldier.)
** [[spoiler:So the assassin lets the defector escape. It's implied that the assassin also lets himself be eaten by sharks, as he feels a sick kinship with how they, "Come to blood from miles away. Eat each other. Stupid, single-minded killers."]] "The difference between a shark and an assassin is a matter of motivation."

[[folder:Live-Action TV]]
* Bandora from ''Series/KyoryuSentaiZyuranger'' turned evil after her son was killed by a Tyrannosaurus. Eventually she went mad with power and forgot all about this until her son came BackFromTheDead. Changed in the english version to her wanting to conquer the universe.
* Sam Winchester from ''Series/{{Supernatural}}'' starts out trying to make the best of his BlessedWithSuck-y demon powers by using them to exorcise demons, hoping to avenge his brother's death at the hands of Lilith. Even when Dean comes BackFromTheDead, Sam remains obsessed with killing Lilith, thinking this will prevent the [[TheEndOfTheWorldAsWeKnowIt Apocalypse]]. With Ruby as his mentor, Sam eventually [[spoiler:drinks [[PsychoSerum demon blood]] to fuel his powers and gets addicted to the stuff. Dean stages a failed intervention and the brothers have a fight which ends in Sam trying to choke Dean and walking out on him. Sam then lets Ruby bleed a possessed woman to gain enough power to finally kill Lilith, knowing this should permanently alter him but expecting to die in the attempt, only to learn that Lilith's death was the final seal which had to be broken [[NiceJobBreakingItHero to free Lucifer]].]]
* ''Series/{{Charmed}}'': Shortly after being freed of his original demon side, Cole was involuntarily possessed by the power of the Source of All Evil, and though he tried to resist for a time, it quickly turned him into the new Source, specially after Phoebe vanquishes the demon that would've taken the Source's essence for himself. After being vanquished, he came back from the dead and tried to use his powers to fight demons, [[GenreBlind though by this time he really should've known better]]. The sisters seem to give him the full measure of blame for his actions, even though Phoebe was partially to blame.
* ''Series/{{Merlin 2008}}'': Morgana. Averted in that it isn't the power in question that makes her evil and forget her friends, it's her actions with it. Her first act of sabotage against the tyrannical King Uther is to seek vengeance for the death of Guinevere's father. Fast-forward three seasons and Morgana has successfully overthrown Uther and taken over Camelot -- but when Gwen reminds her that she too has suffered under Uther's reign, Morgana replies: "I had forgotten."
* ''Series/{{Merlin 1998}}'' Frik asks Queen Mab if her trick of letting Lancelot's wife Elaine know about Lancelot and Guinevere's affair wasn't unworthy of them. Mordred asks what "unworthy" means, and his mother Morgan has forgotten.
* Inverted and Subverted in ''Series/OnceUponATime''. It's the ''evil'' characters who are shown to remember everything, while the "good" characters have forgotten their identities.
** [[spoiler: And even once the curse is broken, the evil characters are usually the ones who keep grudges, and whose past has the strongest influence on their actions. Good characters' motivations are all tied to present conflicts, while the evil characters' motivations are all tied to things that already happened. The Evil Queen hates Snow White for something she did as a child, Rumplestilskin's life all ties back to his history with his father and his own son, and the Wicked Witch's whole motivation is to go back in time to SetRightWhatOnceWentWrong. Evil people are all hung up on the past, good people all focus only in the present, and when a character falls from grace (eg: Snow White's murder of Cora), it is because they let past events lead their actions (eg: All the evil things Cora had done up to that point).]]
* [[ProtagonistJourneyToVillain The long-term arc]] of Walter White on ''Series/BreakingBad'', with "the Dark Side" being the dark side of chemistry -- illicit drug production. He starts cooking meth [[HealthcareMotivation to pay for his cancer treatment]] and [[JustifiedCriminal provide for his family's future after he's gone]]. As time goes on, his justification gets more distant and less believable; he begins to start stealing, murdering and even [[spoiler:[[WouldHurtAChild poisoning a kid]]]] to get what he wants -- which is to keep cooking and making money, even though his cancer is in remission and he's made more money than his wife knows what to do with. No wonder creator Vince Gilligan calls the series "How [[Film/GoodbyeMrChips Mr. Chips]] became Film/{{Scarface|1983}}."
* [[spoiler: Mitsuzane]] suffers badly from this in ''Series/KamenRiderGaim''. [[spoiler: He]] even references it.
--> Why... why can't I remember...? Why can't I remember what your smile was like? What was I trying to protect? What the heck was I fighting for?

[[folder:Pro Wrestling]]
* Par for the course when a performer pulls a FaceHeelTurn in Professional Wrestling; invariably, the new heel performer's original reason to turn heel is entirely justifiable based on something that had recently happened to them. Within a month of the turn, however, MotiveDecay sets in and they end up generically doing things ForTheEvulz.

[[folder:Tabletop Games]]
* Many Chaos Space Marines in ''TabletopGame/{{Warhammer 40000}}'' originally turned to Chaos because of some noble goal (or for self-preservation); but after thousands of years in the service of the Great Gods of Chaos, they have usually either forgotten all about it or use it as a flimsy justification for the atrocities they commit. Then again, many of the factions of ''[=WH40K=]'' who haven't fallen to the side of Chaos still uses almost identical justifications to [[KnightTemplar commit]] [[UtopiaJustifiesTheMeans horrible]] [[FantasticRacism atrocities]].
** All of the surviving Chaos Primarchs. Magnus once wanted to spread knowledge, now his main desire is payback against the Imperium and especially the Space Wolves. Perturabo wanted to be respected; now he lurks on a Daemon World, the prisoner of his own resentment. Angron wanted revenge for the deaths of the only family he ever knew; now the party responsible has been effectively dead for ten millennia, but Angron doesn't care because he lives solely for killing. Mortarion once sought to end the threat of psykers; now he only wants dominion. Fulgrim's quest for perfection - and his Legion's - became a non-stop pursuit of excess. Lorgar is about the only one to remain reasonably clear, since his motivation before and after his fall to Chaos was the spread of faith; all that changed was faith in ''what''. The remaining three are Horus (dead), Konrad Curze (likewise), and Alpharius ([[MindScrew who the hell even knows at this point]]).
* At one point in ''TabletopGame/WarhammerFantasyRoleplay'', the use of necromancy drove you insane, so that no matter why you started practicing it you ended up a would-be world conqueror with an army of the dead. This has been relaxed, with necromancy being dark, creepy, and mostly used by evil people, but it doesn't have to be.
* In ''TabletopGame/{{Exalted}}'', becoming an Akuma can result in an unusually literal version of this. So, you've made a [[DealWithTheDevil deal with the]] [[EldritchAbomination Yozis]] to get the power you need -- this calls for a FaustianRebellion, right? Except that the process of becoming an Akuma excises your ability to do anything, and allows the Yozis to [[MindRape rearrange the inside]] [[FakeMemories of your head]] [[SuperSoldier until it's more]] [[ManchurianAgent to their liking.]]
* The ''TabletopGame/ForgottenRealms'' goddess Shar holds both darkness and forgetfulness in her divine portfolio.
* In ''TabletopGame/DemonTheFallen'', Demons are able to tap into their Torment and unleash terribly destructive powers against their enemies. Unfortunately, the Tormented powers they use as a weapon leave a stain on their soul that becomes progressively more difficult to remove.

* ''Theatre/SweeneyToddTheDemonBarberOfFleetStreet'': The title character's whole story-arc is motivation decay using this trope. By the time that he finally [[spoiler:takes vengeance upon Judge Turpin]], Sweeney has gone quite murderously insane, and is so far gone that [[spoiler:he fails to recognize his own daughter and tries to kill her]]. He's only snapped out of it in the end by [[spoiler:the realization that the beggar woman he killed just prior to killing Turpin was none other than his wife Lucy, who Sweeney had gone on this whole thing to avenge, because his partner Mrs. Lovett didn't tell him that Lucy was still alive]].
* Most versions of ''{{Faust}}'' have him originally making his DealWithTheDevil for at least somewhat decent reasons, but he didn't exactly follow through on them.
** [[Theatre/FaustFirstPartOfTheTragedy Goethe's Faust]], on the other hand, averts this; he is ultimately saved because he ''doesn't'' fall into this trope -- despite satisfying the ExactWords of the contract that will damn him, he never stops searching for transcendent truth, which was the real reason he made the bargain in the first place.
* In ''Theatre/{{Dreamgirls}}'', both the play and the film, the Dreamettes' manager Curtis' morally questionable actions in the first act were for the betterment of the group in the face of a racist system. Come the 70's, however, much of that racism has faded but he's still shady. At this point it's clear that his only motivation is money and being in control.

[[folder:Video Games]]
* ''VideoGame/FireEmblemTheBlazingBlade''
** This was the revelation about Nergal learned in chapter 19x2, the most difficult bonus chapter to receive in the game. [[spoiler:It turns out that Nergal is the father of Nils and Ninian. His research of the dark arts was so that he could find a way to open the Dragon's Gate and be reunited with his children. But the dark magic so corrupted his mind that he forgot the second half of this motive and ended up concluding that the reason he wanted to open Dragon's Gate was so he could destroy the world with dragons ForTheEvulz.]]
** It's stated by at least two other sources that this is what happens to ''anyone'' who dabbles with dark magic for too long, though as [[spoiler:Bramimond]] demonstrates, they won't necessarily turn ''[[DarkIsNotEvil evil]]'' afterwards. Although it still doesn't display a terribly good fate for those who work with elder magic, as [[spoiler:Bramimond]] is shown to have no personality of its own, merely mimicking the mannerisms of whoever it is speaking to. The lack of gendered pronouns in the previous sentence is a result of this -- Athos initially calls it a "he" before switching to genderless pronouns and explaining that the true [[spoiler:Bramimond]] is long gone and that the being they were speaking to was little more than a living mirror.
** The other source happens to be [[spoiler: Teodor]], also in 19x2, who explicitly says that this has to happen to anyone who wants to be really good with dark magic. Yikes.
* More often than not, this happens to people who use fel magic in ''VideoGame/{{Warcraft}}'' setting. Fel will slowly corrupt the user, turning them evil; in the end they're likely to join the world-destroying Burning Legion in order to get more power. Examples:
** Demonic or fel influence: Sargeras, Archimonde, Kil'Jaeden, Kael'Thas, Illidan Stormrage, essentially every warlock, fel orcs/elves, Azshara, Ner'zhul, Gul'Dan (he was a huge jerk anyway but he got ''worse'') and several others.
*** Sargeras was once TheParagon of Good itself, and is more of a case of HeWhoFightsMonsters when he realized all he was fighting for would be for nothing [[spoiler:if (and in his eyes, ''when'') the [[EldritchAbomination Void Lords]] successfully managed to corrupt a sleeping Titan and turn all of creation into a hellhole]] and his fellow Titans refused to help him, so he decided to purge all creation in fire and destruction [[spoiler:in the faint hope [[WellIntentionedExtremist the universe would start again better prepared to fight off the corruption of the Void Lords]]]]. In this case, demonic energy didn't turn him evil so much as [[EvilMakesYouMonstrous change his appearance to reflect his own new nature]].
*** Gul'dan didn't have any noble goals in turning to the fel; he was just a powerhungry jerk who sold out his race to obtain that power, making him one of the few true villains in the setting who has absolutely no sympathetic qualities to him. His teacher Ner'zhul, on the the other hand, did turn to the fel to help his people, but also had certain selfish motivations, and he eventually loses his redeeming qualities as well.
*** Illidan is...[[HeelFaceRevolvingDoor complicated]]. He originally turned to the fel partially to [[TakesOneToKillOne fight the Burning Legion]] during the War of the Ancients, but also because of [[GreenEyedMonster jealousy towards his brother Malfurion]] and [[HeroicWannabe a desire to be the hero]]. He's done both horrible ''and'' good things with that power ever since, and he's been on both sides of the conflict and [[WildCard his own side]]; heck, he even started an order dedicated to using fel magic to kill demons with his demon hunters. These days, he's a questionably-sane WildCard who's more inclined to kill demons than Azeroth's people, but pretty much [[TheFriendNobodyLikes everybody's still wary of him]].
** Necromancy: Arthas, Kel'Thuzad, Nerzhul (plus fel stuff and being selfish to start with) and all his liches like Ras Frostwhisper, some of the more prominent Death Knights...
** Moral of the story: using dark magics does not turn out well for whatever it was you wanted to do in the first place. Apparently, it's only in the RPG you find [[DarkIsNotEvil uncorrupt warlocks or necromancers,]] even though there's now a friendly (but still fairly evil) death knight faction. None of the playable or friendly warlocks in-game seem all that bad. Relatively speaking, anyway.
** Prince Arthas, particularly in ''Warcraft III'' (''VideoGame/WorldOfWarcraft'' arguably doesn't count because the Lich King had mind melded with him). Arthas started out wanting to stop the undead scourge; then he wanted to kill Mal'Ganis to avenge the people who had been killed or turned by the undead. Then he becomes a Death Knight, travels back to civilization and immediately starts killing people. While the descent started a bit earlier, the ArtifactOfDoom Frostmourne (and its corrupting influence) was the part that made him completely forget that he ever cared about keeping people alive in the first place.\\\
It still counts in ''World of Warcraft'' as, for the better part of the time between his ascent to the Frozen Throne and Wrath of the Lich King, Arthas has been in a torpor reflecting on [[HowWeGotHere his actions in his rise to power,]] as detailed in the book Arthas: Rise of the Lich King. By the end, [[spoiler:Arthas comes to terms with using TheDarkSide, and actually assimilates Ner'Zhul, taking his power and becoming the sole force of will behind the Lich King.]]
* ''VideoGame/KnightsOfTheOldRepublic''
** Yuthura Ban. If you ask her about her {{Backstory}}, she'll admit to first becoming a Sith because she had spent her adolescence as a slave to the Hutts and she wanted the power to free others who suffered like she had. She'll admit to being surprised at not having thought about that motive for years, and you can even call attention to the fact that Sith training runs counter to it (a full-fledged Sith ''wouldn't care''). [[spoiler:This is actually important for your final confrontation with her. She is one of the few people who'll accept the LastSecondChance you give if you've shaken her faith previously.]]
** The sequel explains that this also happened to [[spoiler:Revan]].
** Malak started out as Revan's right-hand man and one of the Jedi who wanted to get out there and actually save the Republic. After bathing in the Dark Side, he betrayed his closest friend, then started trying to take over the Republic himself.
* In the ''VideoGame/CityOfHeroes'' back story, Vanessa [=DeVore=] used Giovanna Scaldi's SoulJar mask to help fight off the [[AlienInvasion Rikti]]. Unfortunately, the power -- and Scaldi's evil influence -- corrupted her, leading her to form the [[CircusOfFear Carnival of Shadows]] enemy group. The effect was permanent, even after an attempt to free her from Scaldi's influence she didn't change at all.
* Wiegraff from ''VideoGame/FinalFantasyTactics'' starts out as a battle-hardened yet genuinely [[WellIntentionedExtremist well-intentioned]] rebel who develops a personal vendetta with Ramza after the latter kills the former's sister. His desire to avenge his sister's death is what leads him to [[spoiler: become a knight in the Church]]. After a second failed battle against Ramza, Wiegraff [[spoiler: makes a DealWithTheDevil and becomes a Lucavi Demon]]. The last time we see him, for his final confrontation with Ramza, he explicitly states that he no longer cares about what happened to his sister, and just wants to cause as much pain and chaos as he can. The speech he gives is actually rather unnerving.\\\
It's a even worse than it sounds: [[spoiler:he didn't just decide one day to let a demon into his head. After the second battle he was bleeding out and about to die, cursing himself for being unable to avenge Miluda. Only then does the Zodiac stone offer him another chance by accepting it's power, and he takes it; he was never told the stone held a demon.)]]
* Case of the Lifestream, a ''VideoGame/FinalFantasyVII'' novella, shows that Sephiroth considers memories of his friends, appearance, and childhood "unimportant" compared with his contempt for humanity.
* ''VideoGame/DragonQuestIV'' has this happen to Psaro the Manslayer, who starts out thinking HumansAreTheRealMonsters due to how they treated his beloved Rose and sets out to ensure she'll never be hurt again... despite her constantly begging and pleading with him to stop. Things only get worse after [[spoiler: she's murdered by human thugs]], causing him to declare he'll simply KillEmAll. By the time the chosen ones confront him, he's used [[spoiler: the perfected Secret of Evolution]] and completely lost his mind, declaring that all he remembers is his name and his hatred of humankind.
* Arakune in ''VideoGame/BlazBlue'' starts out as a WellIntentionedExtremist version of scientist named Lotte Carmine, who wished to use the power of [[TheCorruption Boundary]] in order to achieve a discovery that would be beneficial to mankind in the long run... even at cost of a lot of human lives. He tapped onto it, and slowly turned into a man-eating EldritchAbomination that couldn't remember anything except "Want to eat", especially the Azure Grimoire. He still remembered some of his best friends like Litchi, but that 'discovery beneficial to mankind' AKA his original intention? All forgotten.
* ''Franchise/KingdomHearts'':
** Riku goes through this in the [[VideoGame/KingdomHeartsI first game]]. He starts out using the darkness because he wants to retrieve Kairi's heart. This eventually takes second place to his jealousy of Sora -- after taking the Keyblade, losing the Keyblade and getting his ass kicked, he's willing to open himself completely to the darkness if it means he can be stronger than Sora. [[GrandTheftMe Big mistake.]]
** Completely averted with Terra in [[VideoGame/KingdomHeartsBirthBySleep the prequel]]. Through most of the game he's ''very'' careful with his use of darkness, and never loses sight of his morals or priorities. Unfortunately, he ends up even worse off than Riku.
** [[BigBad Master Xehanort]] started out as a WellIntentionedExtremist, believing that the universe is too full of light and that a perfect balance between light and darkness is needed; his plan to trigger a second Keyblade War was so he could acquire the power of Kingdom Hears and remake it in his image of balance. Of course, he's long since become DrunkOnTheDarkSide, and now just wants to cause an apocalypse ForScience.
* ''VideoGame/{{Fable}}''
** Lucien in ''VideoGame/FableII''. He originally wanted to rebuild the Tattered Spire in order to revive his dead wife and daughter, and when he realizes that the protagonist is TheChosenOne destined to stop him, he is visibly shaken when he has to [[spoiler:kill you and your sister.]] However after decades of building the spire on the back of slave labor and dark magic, he's completely forgotten his original purpose for building it, and only wants the power. [[spoiler: This is most obvious the second time he shoots you, in which he'll calmly state he just murdered your family in cold blood, and then kill you without a second glance.]]
** Logan from ''VideoGame/FableIII'' is [[spoiler:a subversion. He never forgot [[EldritchAbomination what]] drove him to tyranny.]]
* ''VideoGame/TheLegendOfZeldaTheWindWaker'' implies this was what happened to [[BigBad Ganondorf]]. He initially set out to conquer Hyrule because he envied its idyllic nature while his people lived in a harsh desert... but when he laid hands on the Triforce, seven years later all he'd changed is that now the rest of Hyrule is even ''worse'' than the desert while he chased the missing pieces of the triforce. ''[[VideoGame/TheLegendOfZeldaSkywardSword Skyward Sword]]'' actually gives an explanation for this- he's the incarnation of a {{God Of Evil}}'s hatred, so no matter what his starting goal, TheDarkSide ''will'' eventually corrupt it into generic EvilOverlord-ism.
* ''Franchise/MassEffect''
** [[TheNeidermeyer The Illusive Man]]. He begins the game as a reasonable, if morally questionable, authority figure, but progressively gets more questionable, at least from the perspective of a Paragon Shepard..
--> '''The Illusive Man:''' Cerberus ''is'' humanity!\\\
'''The Illusive Man:''' Don't turn your back on me Shepard, I ''made'' you, I brought you back from the dead!
** This is made worse in the third game where [[spoiler:it is revealed that the Illusive Man and all of Cerberus got indoctrinated into serving the Reapers. For the Illusive Man anyway, this shows up so subtly that he fails to see it even when he starts huskifying his own men and not even caring when the organization he built from the ground up got burnt to the ground. Admittedly, he does see it at the end if you managed to convince him to kill himself.]]
*** [[spoiler:Played with, however, in that The Illusive man is ''indoctrinated''. Shepard would have turned him around, but he's ''incapable'' of accepting.]]
---->'''The Illusive Man:''' ''(conflicted)'' Your idealism is... admirable, Shepard.
* Daisy Fitzroy, the leader of the Vox Populi in ''VideoGame/BioShockInfinite'', ends up thinking she has to kill ''children'' of upper class parents ''on the chance'' they become {{Corrupt Corporate Executive}}s. [[spoiler:Burial At Sea subverts this, it shows that this was a Batman Gambit she was doing to get Elizabeth to kill her on behalf of the Lucene twins. She had no intentions of harming Fink's son for real]]
* The Templars in the ''VideoGame/AssassinsCreed'' series. While modern society wouldn't begin to agree with their ideas of a plutocracy, their overall goal of creating a utopia where there's no more war and suffering isn't a bad one. But they never reach that point, even by the modern age; the technologies they find combined with the power they already wield by 2012 in the AC Universe would be more than enough to sit down and establish their utopia, or at least parts of it. Instead, even in 2012, they simply keep hoarding more and more power, killing more and more people to get more power, and never reach the point where they feel they should finally sit down and install their utopia instead of killing the Assassins or doing the two aforementioned goals. This is in part due to the continued interference by the Assassins, who are ideologically opposed to them, but their WellIntentionedExtremist stance on UtopiaJustifiesTheMeans keeps falling flat on it's face when presented to us, the players, because they never even try to actually install their utopia in the first place, instead feeling they just never have enough control of the populace.
** This gets explained in III: the order as a whole has been carefully manipulated over the ages to provide a framework that instills a sense of... misguidance in its members, leading to their desire for control in all things, leading to acceptance of domination (enslaving others) and subjugation (being enslaved) themselves. You barely see any of the leaders perform a KlingonPromotion; they toss away the lives of innocents to get where they are instead of taking a page from the assassins and just killing their way to the top. This usually results in the few individual Templars too stupid or too egotistic to be brainwashed taking control of the whole damn thing, which is the main reason why the order is so fucked up. The whole point of this was so that, in the event that an Ubermensch took command, that person would rule the entire planet unopposed and well-defended. That person is [[spoiler:Juno, one of the First Civilization survivors, who brain uploaded herself in a bid to take revenge on humanity by using them to warp reality]].
* ''VideoGame/{{Gungrave}}'''s Harry [=MacDowell=]. Played to full, [[TearJerker tear-jerking]] effect.
* In ''VideoGame/TheElderScrollsIIIMorrowind'', BigBad PhysicalGod Dagoth Ur may have this trope going on depending on [[TheRashomon which version]] of {{backstory}} events you choose to believe. According to one account of his history, he only started using the power of the [[CosmicKeystone Heart of Lorkhan]] in order to protect it from being abused by the Tribunal; but it corrupted him and he became worse than they ever were.

[[folder:Visual Novels]]
* Zouken Matou from ''VisualNovel/FateStayNight''. He originally began his hunt for the Holy Grail as a way to honor the woman he loved, Justica Von Einzbern. But as he grew older and began turning to more and more twisted magic to keep himself alive long enough to accomplish this, his soul began to rot and his mind went with it, leaving him a corrupt, ruthless madman obsessed with immortality.
* In ''VideoGame/PhoenixWrightAceAttorney'', Miles Edgeworth start out as a child with the idyllic view that defense attorneys protect the innocent (a view shaped by his father, a defense attorney who was the closest the series had to a BigGood). Following said father's murder and an upbringing by [[spoiler: his murderer,]] [[AmoralAttorney prosecutor Manfred Von Karma]], Edgeworth forgot his childhood beliefs and began to view defense attorneys as obstacles to be crushed on his way to keeping a perfect record of guilty verdicts. As the series goes on, he remains a prosecutor but remembers what he originally knew law was about, focusing his career on uncovering the truth in every case.

[[folder:Web Comics]]
* [[spoiler:Vaarsuvius]] goes through this in ''Webcomic/TheOrderOfTheStick''. [[spoiler:He/she accepts a DealWithTheDevil to gain the power needed to save his/her family from a dragon with a grudge. After killing the dragon, he/she zombifies what's left of her to make her suffer more. And then, his/her spouse insists she relinquish the power ''right now'', Vaarsuvius refuses and leaves to "fix everything", and ultimately loses the power anyway in an ill-fated attack on the BigBad. The worst part? The dark side had ''nothing'' to do with any of this. Everything Vaarsuvius did was done willingly.]]
* Trace from ''Webcomic/TwoKinds'' tried to resurrect his dead wife before black magic poisoning turned him into a power-hungry dictator. Or at least, that's what a character told him...
* King Lewstrom, the lich necromancer of ''Webcomic/YetAnotherFantasyGamerComic'', is revealed to be this. His backstory is eventually told, and involves him turning to a dark goddess in order to gain revenge on those who killed his family. Centuries later he is a lich and remembers none of this. Upon finding out, he asks his goddess why she never held up her end of the bargain. She claims she did; he out-"lived" all of his enemies.
* It's explicitly mentioned in ''Webcomic/TowerOfGod'' that, on their way to the top, only a rare few remember the reason they originally wanted to climb the tower for. Most forget it amidst the power and riches they encounter, and don't realise it until much later, if at all.

[[folder:Web Original]]
* While only "evil" in a tongue-in-cheek way, Artefact of ''Sankaku Complex'' was not always a depraved anime-yellow-journalist-slash-pornoblogger. His earlier writings were more gushing and humble in tone (in contrasts with his signature witty DeadpanSnarker style), recommending ''Anime/{{Yotsuba}}'' for learning Japanese, as well as promoting artists, works, or stores he likes. Compare old titles like "Yotsuba-to! Ė Ideal manga for learning Japanese?" to the typical "Ichiban Ushiro no Dai-Maoh Bukkake Milking Anime" common nowadays.
* Los Magnificos, the heroic defenders of Mexico City in the ''Roleplay/GlobalGuardiansPBEMUniverse'', made a deal with the Garodillos crime family to turn a blind eye to certain crimes in exchange for the crime family's assistance in policing the barrios they controlled of its more extreme elements, because the problems faced by those areas were too much for the heroes to handle on their own. And it worked, for a while. Sure, there was still drug-trafficking, but murders and rapes went down. Eventually, however, the members of Los Magnificos were little more than a superhuman enforcement arm for the Mexican mafia.
* As Kasei's MotiveRant in ''Roleplay/WeAreOurAvatars'' reveals, he was already willing to do heinous things in the name of science, but he soon began to enjoy them more and more until he became little more than a sadist, doing research less to discover things as to gain the power to stop anyone from challenging him.

[[folder:Western Animation]]
* ''WesternAnimation/StarVsTheForcesOfEvil''
** Toffee eventually shapes himself as the BigBad of the series. WordOfGod [[https://www.youtube.com/watch?v=bme4NT7FleE compares him]] to Magneto, as someone who is trying to do good in "the wrong way". This might explain his initial [[spoiler:revolt]], but by present time he seems to be just a ManipulativeBastard with no end goal in mind.
* ''WesternAnimation/PinkyAndTheBrain''
** [[spoiler:Sigmund Freud determines through hypnotism that Brain's desire to rule the world was actually created in him subversively and accidentally by the scientists at his lab. What Brain ''really'' wanted was to go back to his family, who lived in a can with a picture of the world on it. But his mind was warped by the experimentation to the point that all he could remember was his desire for that image of the world.]] Brain considers the possibility, but ultimately dismisses it and goes on as planned.
** Also, a combination of WellIntentionedExtremist and AesopAmnesia add up to this trope in the episode where Brain turns away from megalomania and vows to spend his life helping the victims of his obsession (first and foremost, Pinky). Despite Brain's best efforts to help prepare him, Pinky (as a tiny, dumb mouse) gets trampled and abused in the real world, prompting Brain to swear that he WILL take over the world, in order to make it a better place that would be fair and kind to people like Pinky. This motivation never comes up again, and Brain is back to abusing Pinky at will in the next episode.
* ''WesternAnimation/StarWarsTheCloneWars''
** Asajj Ventress spent many of her early years training under a Jedi who treated her with respect and seemed like her happiest days of her life. Then her master gets killed, she goes on a RoaringRampageOfRevenge, Dooku recruits her, and she is now his apprentice.
** She and the Nightsisters did this with Savage Opress. They used some sort of Dark Magic, to transform Savage into a monstrous giant, who killed his brother when Asajj ordered him to do so. Earlier he became Asajj's slave willingly, in exchange for said brother's freedom.
* ''WesternAnimation/StarWarsRebels''
** According to WordOfGod, The Inquisitor was one of the Jedi Sentinels who overheard Bariss Offee's proclamation of the failures of the Jedi Order and her words planted the seed of doubt in his heart. Unfortunately, by becoming an Inquisitor, he has joined with the very people that caused the Jedi and Republic's fall from grace.
* ''WesternAnimation/TeenageMutantNinjaTurtles2012'': Shredder's love for Tang Shen, and her choosing Splinter over him, is [[LoveMakesYouEvil his primary reason for turning evil]]. By the time of "Requiem," he's fallen so far that he no longer seems to care about Tang Shen at all, having absolutely zero qualms against [[SpeakIllOfTheDead mocking Shen's death to Karai's face]] by declaring that it's fitting that Karai will [[KillItWithFire die in the same manner as her mother]].
* More recent ''Franchise/{{Transformers}}'' storylines have this happening to [[TinTyrant Megatron]]. He usually gets his start as an idealistic miner-turned-gladiator chaffing under the FantasticCasteSystem that's been crippling Cybertron, starting protests against the corrupt Autobot leadership and forming a friendship with Orion Pax, an Autobot who believes that his cause is just. Unfortunately, his own growing discontent with the system, his bloodlust, and his desire for power and the right to lead Cybertron into a new GoldenAge eventually [[YourTerroristsAreOurFreedomFighters makes him more radical]] and turns him into [[FaceHeelTurn someone just as bad as the ones he was fighting against]] as he goes to war with Orion, now his mortal enemy [[BigGood Optimus Prime]]. By the time of the present day and their conflict gets to Earth, Cybertron is a war-torn wreck and Megatron is [[BecameTheirOwnAntithesis a warmonger who will settle for nothing else than total domination of the universe, freedom the farthest thing from his mind]].
* The second season of ''WesternAnimation/VoltronLegendaryDefender'', reveal this to be the backstory of Zarkon and Witch Haggar. [[spoiler: Zarkon was a King who was desperately fighting to preserve his dying planet. Witch Haggar was a Altean scientist passionate about her work. The two of them meet and fall in love. Sometime later they discover a rare comet made from a very powerful ore. Zarkon believing the ore is the answer to his planet's problems, and Haggar being fascinated by its unlimited power to the point of obsession, eventually drove both of them into a downward spiral until both of them CameBackWrong.]]