''A Fairytale for the Demon Lord'' is a [[KoreanWebtoons Korean]] {{Manhwa}} {{webcomic}} about a knight who rescues a princess from the wicked demon lord who has kidnapped her.

[[{{Deconstruction}} Sort of]]. BlackAndGrayMorality (perhaps even [[EvilVersusEvil Black And Black Morality]]) abound.

The scanlations of this webcomic are usually updated weekly and can be read [[http://www.batoto.net/comic/_/comics/a-fairytale-for-the-demon-lord-r867 here]]. For those who want to see the original Korean version, go [[http://cartoon.media.daum.net/webtoon/view/ataleforsatan here]]. A sequel comic has come out, ''A Fairytale for the Demon Lord: Season Two.''

(Be warned that ''spoilers'' abound below; the worst of them have been tagged, but it's hard to list any tropes at all for this work without spoiling some things.)
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!!The Tropes associated with the series
* BigBad: The old king Odin. The Nameless Knight becomes this when he becomes the final Demon Lord.
* BlackAndGrayMorality: Somewhere between this and flat-out EvilVersusEvil.
* BlindSeer: Mimir.
* CurbStompBattle: Just about anyone and anything who fights the Nameless Knight and who isn't clearly the BigBad dies in one panel, but most obviously [[spoiler:Balder, who has a lengthy build-up as TheDragon and then dies ''less than'' one panel, cutting instantly from his multi-page BadassBoast to his broken and dying body.]] He gets a bonus chapter complaining about this (along with several other villains who were unceremoniously killed.)
** [[spoiler: At the very least, in the final timeline, the Balder slain by the final Demon Lord was a clone.]]
* DecoyProtagonist: The first chapter and much of the second makes it seem like the Demon Lord is going to be the main character. [[spoiler:Or is he the main character after all?]]
* DeliberateInjuryGambit: [[spoiler:The main character allows his own arm to be cut off so he can embed it in Odin's chest, then use his Charge Sword technique to summon a sword ''inside Odin's body''.]] Of course, his [[GoodThingYouCanHeal insane healing abilities]] make this less of a sacrifice than it seems.
* DudeLooksLikeALady: Puginn is a guy but looks a lot like an androgynous woman.
* EvilMakesYouUgly: After the Nameless Knight becomes a Demon Lord the Princess no longer recognizes him, [[spoiler:due to her regeneration, which gave him Odin's appearance, having worn off.]]
* EvilOverlord: [[ExactlyWhatItSaysOnTheTin Of course]]. The demon lords seem to be an entire series of identical evil overlords, not just one.
* {{Flashback}}: The majority of the story is dedicated to showing how [[spoiler: the Nameless Knight]] became the Demon Lord seen in Chapter 1. [[spoiler:Or is it a StableTimeLoop? Or do the same events just repeat themselves naturally over and over again? Good luck trying to figure it out from the [[GainaxEnding ending]]!]]
* FountainOfYouth: Odin goes from a decrepit old man to [[spoiler:the Nameless Knight's doppelgänger]].
* GainaxEnding: Despite all the ridiculous plot twists that build up during the story, by the end they've mostly settled down...then the ending finally shows up, and turns the whole thing into a MindScrew of MASSIVE proportions...again. It's such an unexpected twist that even [[spoiler: Muninn]] is taken by surprise.
** [[spoiler:The ending makes a lot more sense if you realize that losing to the Demon Lord is Odin's goal. If the Final Demon Lord has the princess, he will stay with her in his castle instead of destroying the world.]]
* HealingFactor: The Nameless Knight can recover from losing half his body near-instantly.
** The Demon Lord also has an innate regeneration ability, though it's much slower. [[spoiler: It's because they're the same person.]]
* HealingHands: The princess heals the Nameless Knight and [[spoiler:gives him Odin's face in the process.]]
* HistoryRepeats: Either this taken to literal extremes or a flat out StableTimeLoop; it's not yet clear which.
** As it happens it's a regular case of HistoryRepeats. The confusion arose because [[spoiler:Odin has been conducting thousands of experiments to find the exact sequence of events that would encourage the Final Demon Lord to effectively seal himself away.]]
* Interquel: Part 2 opens with Odin training for his fight with the Nameless Knight-turned-Demon Lord, then jumps to the Nameless Knight being harassed by a young female Knight who is convinced he'll become then next Demon Lord.
* KickTheDog: Several, but by far the most dramatic is when [[spoiler:the Nameless Knight coldly kills Liddel even after the boy has earnestly promised to trust him, simply to be ''completely sure'' that he remains silent.]]
* LoveMakesYouCrazy and [[LoveMakesYouEvil Evil]]: [[spoiler: The protagonist. Also, Mimir.]]
* MissionControl: Puginn fills this role for the protagonist, frequently.
* NamesToRunAwayFromReallyFast The Final Demon Lord [[spoiler:Ragnarok. The first Demon Lord was Loki.]]
* NoNameGiven: The protagonist is referred to as the Nameless Knight and later as the Demon Lord. [[spoiler:Odin gives him the name Ragnarok in Part 2.]]
* NobleDemon: The demon lords are often this; one of them even goes so far as to bless Odin's efforts as he fades away after the guy kills him, even while telling him that YouCantFightFate.
* NotQuiteDead: [[spoiler: Balder]]. Despite his "death" in the main story, he was shown later in one of the side stories, personally digging up the remains of his dead troops so that he could give them proper burials, claiming that as the sole survivor of their group, it was his duty to erect their tombstones, and write their epitaphs with the blood of the person who killed them.
* PoorCommunicationKills: The Nameless Knight could just [[spoiler:''tell'' the princess who he is, when she fails to recognize him, you know? At the very least, it wouldn't hurt.]]
* ProtagonistJourneyToVillain: The Nameless Knight's [[LoveMakesYouEvil love]] for the Princess causes him to [[JumpingOffTheSlipperySlope throw himself headlong off the slippery slope]] and become the final Demon Lord.
* RPGMechanicsVerse: A subtle version -- subtle enough that it's hard to be sure -- but much of the technology and many of the rules of this world seem to subtly work in ways that match those of an RPG; in a way, it's like a dark take on what world like that would really be like. Unlike most, it's not at all played for comedy.
* SaveThePrincess: Played straight, subverted, inverted, and played with in just about every other possible way at various points in the story.
* ScrewDestiny: Almost every named character has this as their goal in one way or another. Several characters will flat-out flip their lid if you mention fate in front of them at all. [[spoiler: They all more or less fail in the end.]]
** Until the continuation, where it turns out that the events of the first series [[spoiler:and the thousands of other identical simulations Odin ran have potentially averted the destruction of the world]].
* SchizoTech: They seem to have technology capable of instantaneous long-range teleportation and communication, materialization of objects from nowhere, and prediction of the future. Yet to fight, they rely on swords.
** Well, since so many seem to be able to heal quickly, swords are just the easiest way to tear enemies to pieces. So there is nothing left to heal
* SelfFulfillingProphecy: On hearing a prophecy that an inevitable death is coming for him, Odin decides to [[spoiler:marry and then sacrifice the princess in order to extend his own life]], which of course causes [[spoiler:the knight to hunt him down and kill him first]].
** Gets even better in the sequel: [[spoiler:The events described above were Odin's attempt at enraging the the knight enough to become the Demon Lord and claim the princess. This is to prevent TheEndOfTheWorldAsWeKnowIt.]]
* SpannerInTheWorks: The Nameless Knight, to [[spoiler:Odin]].
* TomatoInTheMirror: [[spoiler:The Nameless Knight is the Demon Lord by the end of the story through what seems to be a StableTimeLoop.]]
* VoluntaryShapeshifting: Puginn turns from a crow into a -- person.
* {{Yandere}}: The Nameless Knight for the Princess.
* YouCantFightFate: Odin created the Princess to break fate. He failed.
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