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[[quoteright:338:[[Webcomic/FlakyPastry https://static.tvtropes.org/pmwiki/pub/images/fpastry448edit_copy_2306.jpg]]]]
[[caption-width-right:338:The "useful but explosive" kind. [[BaitAndSwitchComparison And so is her magic!]]]]

->''"When I sensed this place, the afterglow of so many spells cast all at once, I couldn't make heads or tails of it. ... With thousands of people under your thumb, all interacting with each other according to complex storylines. ... You're even running illusions miles away on the edge of town! Magic on autopilot!"''
-->-- '''Agatha Harkness''', ''Series/WandaVision''

Magic and powers with a "chaotic" theme. Often referred to as "chaos magic", "wild magic" (not to be confused with the WildMagic trope) or, more fancifully, "entropic magic" or variants on that name. Sometimes appears in settings with an OrderVersusChaos cosmology, but can pop up anywhere.

It can function in many different ways, but frequent traits include: high randomness and uncontrollability, probability manipulation, and inducing accelerated decay and destruction, depending on how the writers understand the concept of chaos and entropy.

"Entropy" in particular is one of these scientific concepts which appeals to writers due to its cool, sinister-sounding name and its association with decay. In real life, "entropy" is a physical concept, roughly defined as a measure of disorder and chaos of a given system.[[note]]Strictly speaking, entropy is a constant multiplied by the natural logarithm of the number of microstates (distribution of particles by states) corresponding to same observed macrostate (set of observed macroparameters) of the system.[[/note]] Per the second law of thermodynamics, the entropy of an isolated system can only grow, never decrease; the only way to decrease the entropy is for some external force to do work on it.[[note]]Think about how a [[http://www.smbc-comics.com/comic/entropy messy room will only get messier over time, and it takes someone deliberately cleaning up to restore it to a more ordered state.]][[/note]] It's closely related to the concept of UsefulNotes/{{Energy}}, due to its transformative nature. Since the universe itself (as far as we know) is an isolated system with no external forces that can affect it, this suggests that eventually it will succumb to [[ApocalypseHow/ClassX4 "heat death of the universe"]]: eventually all organized systems will break apart.[[note]]Ironically, despite people usually conflating this idea with chaos, the heat death of the universe will result in the most ordered state the universe has ever seen: a sea of matter stretching evenly and uniformly across the entire universe in all directions until the end of time, assuming quantum mechanics does not produce a new Big Bang -- forever is a long time, after all, and the physics of such extremely low conditions of temperature and density, where quantum effects would prevail, are thought to be poorly understood. This is actually a basic fact about entropy, as higher entropy states tend to be more "soupy."[[/note]]

Since this all sounds quite scary, Entropy and Chaos Magic tends to be portrayed as [[ChaosIsEvil villainous]], or at least so destructive that little good can come of its use. If a setting divides magic into 'good' and 'bad' forms, expect chaos and entropy to be sorted under BlackMagic.

Chaos Magic also exists [[AluminumChristmasTrees in real life]]. It is a Postmodern esoteric practice that eclectically borrows from older magical traditions in order to create new rituals. Notable Chaos Magicians who have incorporated it into their work include Creator/WilliamSBurroughs, Creator/GrantMorrison, Timothy Leary, and Music/DieAntwoord. Website/{{Wikipedia}} [[https://en.wikipedia.org/wiki/Chaos_magic has more information.]]

See also GodOfChaos, {{Antimatter}}, PowerOfTheVoid, and CastingAShadow.
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!!Examples:

[[foldercontrol]]

[[folder:Comic Books]]
* Chaos Magic is explicitly or [[ImpliedTrope implicitly]] portrayed in ''ComicBook/TheInvisibles''. Multiple practices of it appear, like scrying, sex magic, fiction-jumping or Gnosticism. Fittingly, its writer Creator/GrantMorrison is a practicing chaos magician. [[MindScrew It gets crazier]] -- according to Morrison, the comic book is supposed to be a hyper-sigil spell that [[LogicBomb affects the world on a fundamental level and makes the reader question their own reality]].
* Chaos Magic exists the Franchise/MarvelUniverse. It was deemed so dangerous that magic users suppressed any knowledge of its existence in order to weaken it. ComicBook/DoctorStrange, ''the Sorcerer Supreme'', said that such a thing didn't exist. Then [[ComicBook/ScarletWitch Wanda Maximoff]]'s probability-based mutant power [[DoingInTheScientist were sourced by contact]] with the imprisoned Elder god turned demon Chthon, who was basically chaos magics patron deity and the main reason knowledge of it was suppressed.

[[/folder]]

[[folder:Fan Works]]
* ''Fanfic/ChildOfTheStorm'' has this as arguably the most dangerous form of magic -- as Wanda explains, the only limits are the caster's [[BreadEggsMilkSquick power, imagination, concentration, and willingness to risk tearing the fabric of reality.]]
** Wanda Maximoff, unlike [[ComicBook/ScarletWitch her canon counterpart]], is very skilled at managing her chaos magic -- though when it first manifested along with her mutation, it nearly drove her completely insane despite the best of efforts of [[{{ComicBook/Magneto}} her father]], [[Literature/HarryPotter Albus Dumbledore]], [[ComicBook/IronMan Howard Stark]] and [[ComicBook/XMen Charles Xavier]], to the point that [[Literature/TheDresdenFiles the White Council]] wanted to execute her simply because she was too dangerous. Cue Doctor Strange sweeping in, flipping the White Council the bird and taking her as his apprentice.
** Hermione, ironically, seems to have a predilection for this. In the sequel, she's demonstrated to be having trouble with it -- she thrives on [[MagicAIsMagicA learning and mastering the strict rules of normal magic]], while Chaos Magic by definition has no rules. [[spoiler:Since she's Wanda's daughter, this gift is hardly surprising -- but still ironic.]]
* The protagonist of ''Fanfic/TheLastDraconequus'' is Discord, a GodOfChaos.
* ''Fanfic/WhatTheCatDraggedIn'': From seeing [[WesternAnimation/MiraculousLadybug Ladybug and Chat Noir]] in action, [[Franchise/MarvelCinematicUniverse Natasha and Clint]] were able to accurately deduce that not only are their powers magical in origin, but they operate on a system of magic based around probability.
[[/folder]]

[[folder:Literature]]
* The initial impetus for the main plot of ''Literature/BloodRites'' is when Harry is hired to deal with an entropy curse that kills its targets in strange and unusual ways (something later explained as being caused by the person directing most of the curses being TheDitz). A previous victim is killed after being hit by a car... while water-skiing. Harry manages to intercept and redirect another use of it that causes a frozen turkey to fall out of a passing aircraft and pulverise an attacking [[OurVampiresAreDifferent Black Court vampire]] and, just for extra value, cause the cooking timer to pop out and ding.
-->''"For my next trick, [[AnvilOnHead anvils]]!"''
* ''Literature/BruceCovillesBookOf Monsters II'': ''The Wizard of Chaos'' involves [[Myth/ArthurianLegend Cai]] and [[Myth/KingArthur Arthur]] finding a wizard gifted with chaos magic, causing seemingly random effects.
* The "wild magic" which is the AppliedPhlebotinum of ''Literature/TheChroniclesOfThomasCovenant''.
* ''Literature/ConstanceVerityDestroysTheUniverse'': While Doctor Malady first theorizes that the Caretaker Destiny is an accumulation of negentropic energy, it's later revealed that the opposite is the case. The Caretaker Destiny is actually a fixed accumulation of entropic energy left by The Key, and that when its host prevents disasters and saves lives, [[WindsOfDestinyChange it is actually absorbing potential entropy, snatching triumph from the jaws of tragedy by absorbing cosmic decay]]. Having accumulated so much entropy through countless hosts, it has reached a point of PhlebotinumOverload which will destroy the universe.
* ''Literature/{{Dragaera}}'':
** Elder Sorcery is powered by and involves the manipulation of Amorphia, the physical substance of raw chaos. It's a capital crime in the Dragaeran Empire because (a) Amorphia tends to dissolve everything around it into more Amorphia and (b) any MagicMisfire with Elder Sorcery can create a ''lot'' of Amorphia, as exemplified by the deluge that annihilated the old capital city when one guy botched a spell.
** Dragaeran sorcery is powered indirectly by a vast natural deposit of Amorphia, but is regulated by the Imperial Orb to which all Dragaeran citizens have a psychic link. The Orb's stabilizing influence keeps the Amorphia from going out of control and frees sorcerers from needing to have any Amorphia physically present, a fantastic tactical advantage that [[spoiler:pushes the Jenoine AbusivePrecursors to launch an invasion to try to learn how to replicate it]].
* In the first book of ''Literature/TheLaundryFiles'', Bob Howard investigates a parallel universe where [[spoiler:the Third Reich]] managed to summon an entropy being which caused the heat-death of their universe, and is trying to infiltrate the main universe [[spoiler:by manipulating human governments to nuke the portal]], which would "create" enough entropy so that it could expand the portal and squeeze through. In a broader aspect, the "magic" from the universe of the Laundry is the manipulation of information entropy: specifically, "agents" of each government/cult are attempting to lower the entropic value of the events that they want to happen while raising the entropic value of events that their rivals want to happen... all without raising the ''thermodynamic'' entropy of the universe to prevent entropic beings (such as the one in The Atrocity Archives) from breaking through and wreaking havoc.
* In ''Franchise/{{Mistborn}}'', this is [[GodOfEvil Ruin]]'s whole schtick. He is a living force of intelligent decay and entropy, seeking only to unmake the world. Appropriately enough, the magic system he empowers -- hemalurgy -- requires [[BloodMagic blood sacrifice]] to work, making it a power that can only be accessed through destruction, and even under ideal circumstances there's always going to be some power lost in the process, despite the user coming out ahead, and when not stored in blood or in a person, a hemalurgic spike will slowly become less and less potent, though it will always retain a small amount of charge.
* Isyllt, the heroine of ''Literature/TheNecromancerChronicles'', is a {{necromancer}} and an entropomancer, the latter being a somewhat related but much rarer ability. She can accelerate, focus and control decay; for example, she causes a steel lock to rust away to dust in less than a minute.
* ''Literature/OldKingdom'': Free Magic, which is made up of all the powers left over from when [[BackgroundMagicField the Charter]] was made, most of which are inimical to ordinary life. Notably, unlike the heavily rule-bound Charter Magic, Free Magic has almost no rules at all -- so long as you have sufficient strength of will and a strong enough source of it, you can do just about anything (though it's best at tearing things down). Of course, there are [[WithGreatPowerComesGreatInsanity side effects]]...
* Demons of the first choir in ''Literature/{{Pact}}'' are described as "entropy distilled" and "the antithesis to creation", and specialize in removing things from creation and leaving nothing in their place. There's no way to restore what was lost, and in many cases [[RetGone no way of knowing what was lost at all]]. It's speculated that the entire universe is itself composed of fragments of things they've devoured.
* In ''Literature/SagaOfRecluce'', pure Chaos is basically pure energy, but it has entropic side effects. Chaos mages age faster than normal humans, the wine they drink turns to vinegar before they're finished with it (or even after a minute or two for very powerful mages), books they read fall apart after a few years, and the city where the chaos mage guild is located is covered in a thin layer of fine white dust formed from Chaos energy slowly destroying the stones of the city.
* In ''Literature/ShadowOps'', entropy is the domain of [[BlackMagic Negramancy]]. Anyone with this power is a OneManArmy; the only known person with this power is able to destroy most of a fully staffed military base of soldiers specially trained to fight magic-users in moments by simply making their equipment and bodies decay in seconds.
* In a variation, [[NamesToRunAwayFromReallyFast Aornis Hades]] from the ''Literature/ThursdayNext'' series manipulates entropy to affect chance -- specifically, by lowering entropy in order to cause improbable and fatal accidents. This has the side-effect of causing numerous, unrelated coincidences to pile up just prior to the accident -- long enough for Thursday to realize that the attack is coming.
* In the ''Literature/WorldOfTheFiveGods'' series, the demons bound by sorcerers are innate creatures of chaos. One way to keep a demon tame and easier to control is to 'shed' entropy, by causing little forms of decay, rust, or rot. (In one case, a sorceress caused milk to sour and wine or beer to go bad, at this one particular inn, in order to keep her demon occupied. Another powerful but poorly-trained sorceress used the entropic powers to aid in laying siege to a fortress, destroying stored food, potable water, and many of the weapons.) Inversely, using sorcerous magic to ''undo'' some form of destruction is '''extremely''' difficult, but possible. (A sorcerer mentioned having reconstructed a burnt letter, at great cost.)
* [[BigBad The Lone Power]] in the ''Literature/YoungWizards'' series has the main goal of bringing death to the multiverse by spreading entropy everywhere (he's also responsible for the creation of entropy, by the way), and his powers are wizardly in nature. Conversely, the proper application of wizardry can slow entropic decay.
[[/folder]]

[[folder:Live-Action TV]]
* Ethan Rayne from ''Series/BuffyTheVampireSlayer'' worships chaos and often uses chaos magic.
* ''Series/WandaVision'' reveals that Wanda Maximoff, like her [[ComicBook/ScarletWitch comic counterpart]], is using chaos magic. [[spoiler:When Agatha Harkness, a more traditional witch who initially assumed that Wanda created [[EldritchLocation the Hex]] with complicated, multilayered spells, realizes that Wanda created it through sheer force of will with chaos magic, she is equal parts impressed with Wanda's achievement (to the point of bestowing upon her the title of "the Scarlet Witch") and disappointed that she used it to do something as mundane as create a perfect sitcom life for herself.]]
[[/folder]]

[[folder:Multimedia Franchises]]
* ''Franchise/{{Nasuverse}}'':
** Aoko Aozaki is described as being a decent mage who specializes and excels at using her magic for destruction. Not even Alice Kuonji, a much more advanced mage than Aoko, can keep up with Aoko's simple yet powerful destruction spells. This is to the point that even Nvrnqsr Chaos, a self-proclaimed personification of Chaos, thinks her spells go against the idea of order and deems her [[TooSpicyForYogSogoth too chaotic for him to even risk absorbing]] in ''VideoGame/MeltyBlood''. In ''VisualNovel/WitchOnTheHolyNight'', she also becomes the only user of Fifth Magic, of which one of its functions is time travel. She uses it to [[spoiler:displace Soujuurou's death by moving it into the distant future when he gets killed five minutes prior to her accessing it, but her sister Touko calculates that doing this is also displacing magic/energy in the timeline, which will lead to the inevitable heat death of the universe. Aoko plans on dealing with it when the time comes]].
** Flat Escardos of ''Literature/FateStrangeFake'' and ''Literature/LordElMelloiIICaseFiles'' is noted to be a rare practitioner of the "real-life" version of chaos magic. In the series' universe, this should normally be all but impossible, as it would require not only understanding the entire theoretical foundation behind each spell to combine, but also for the user to somehow reconcile and combine incommensurable foundations in order for a spell to be anything but useless. Flat gets around this by being a GeniusDitz who [[AchievementsInIgnorance simply doesn't realize that this shouldn't be possible]].
[[/folder]]

[[folder:Tabletop Games]]
* ''TabletopGame/DungeonsAndDragons'':
** The Wand of Wonder (several varieties), which has a different effect each time it's used.
** After the Time of Troubles, the TabletopGame/ForgottenRealms developed Wild Magic Zones, where any magic use could cause a random Wild Magic Surge which was often quite dangerous.
** The [[TabletopGame/AdvancedDungeonsAndDragons2ndEdition 2nd Edition]] supplement ''Tome of Magic'' has Wild mages and the Chaos sphere for priests. Both emphasized chaotic spells with random results. Wild Mages later returned as a sorcerer option in 5th edition.
** There is at least one prestige class in [[TabletopGame/DungeonsAndDragonsThirdEdition Edition 3.5]] called the "entropmancer" who uses a "shard of entropy" as its main weapon. It kinda screws up the whole physics thing there (a "shard of entropy" [[ArtisticLicensePhysics makes about as much sense as "a piece of temperature"]]), but the thematic link is obvious.
** In [[TabletopGame/DungeonsAndDragonsFourthEdition 4th Edition]], Sorcerers can choose Wild Magic as a spell source, which is described as channeling power from the Elemental Chaos. To go along with the theme, many Wild Magic powers daze or stun enemies or have an effect determined randomly via die roll. Even boons from various Wild Magic features are determined randomly.
** In [[TabletopGame/DungeonsAndDragonsFifthEdition 5th Edition]], this is one of the Sorcerer options from the Core Rulebook. It allows them to manipulate luck to a certain extent, but in exchange they may suffer a "wild magic overload" that manifests in a random effect that can go from shooting an area effect spell centered on the sorcerer to being temporarily transformed into a potted plant or healing themselves.
** The ''Tasha's Cauldron of Everything'' expansion also brings the "Path of Wild Magic", a ''Barbarian'' subclass that causes random magical effects every time the barbarian enters a rage.
* Entropists in ''TabletopGame/FabulaUltima'' are mages who draw their power from the churning chaos beyond the stars to cast spells which manipulate probability, distort time, drain life, reflect magic, and blast foes with pure darkness.
* Red magic in ''TabletopGame/MagicTheGathering'' is the most geared toward "chaos", with more cards with random or semi-random effects (mostly governed by coin flips) than any other color. Black has the most cards with "entropy" themes, although Green also gets into the mix with cards themed around natural decay.
* Anarchy Mages in ''TabletopGame/PoniesAndParasprites''. These characters have sought out and learned from Discord himself. They use a ''Pandemonium Spark'' to channel the powers of the GodOfChaos in much the same way a Cleric from ''TabletopGame/DungeonsAndDragons'' would. These mages have a tenuous grasp of their powers, meaning that their channels can and will go wildly out of control.
* Entropomancers in ''TabletopGame/UnknownArmies'' have power over luck and accidents, and gain power by deliberately putting themselves in risky situations. They've earned their nickname of "[[TooDumbToLive Bodybags]]" honestly. They also tend to be one of the scarier wizard schools in the setting. Many a character might hijack a public bus and drive it against traffic, or play RussianRoulette, but few would do it for a lark because it gives them a power boost.
* ''TabletopGame/{{Warhammer}}'' and ''TabletopGame/Warhammer40000'':
** The forces of Chaos represent ultimate entropy for both game universes, since the victory of [[GodOfChaos the Chaos Gods]] is inevitable and naturally puts an end to everyone else. Chaos also happens to be the source of all magic in both 'verses.
** Some of the spells in the game have specifically entropic effects of the "aging to dust" sort.
** All forms of magic traditionally come with a random bad result from screwing up a spell/psychic power, ranging from a bad headache to exploding your own head and the heads of everyone around you to mutating into the local equivalent of a Shoggoth.
[[/folder]]

[[folder:Video Games]]
* ''VideoGame/AncientDomainsOfMystery'' features a variety of magicians devoted to Chaos, including the [[NamesToRunAwayFromReallyFast Chaos Archmage]], guardian of the elemental Mana Temple. His powers are no more random than those of any spellcasting enemy, but he's ''much'' meaner than most of them. Like most of the other Chaos-themed creatures in the game, he can also [[TheCorruption corrupt]] your character with a melee touch attack, which produces a series of randomized [[BodyHorror warping effects]].
* Chaos Knight from ''VideoGame/DefenseOfTheAncients'' uses this.
* Entropy magic in the ''Franchise/DragonAge'' series consists mostly of {{curse}}s and other sinister powers and is closely connected to [[AnotherDimension the Fade]].
* ''VideoGame/DungeonCrawl'' has Annihilations. ExactlyWhatItSaysOnTheTin.
* In ''VideoGame/DungeonSiegeIII'', this is used by Reinhart though the spells are more like FormulaicMagic that focus on DPS.
* Entropy is an element in, well, ''VideoGame/{{Elements}}''.
* ''VideoGame/FallFromHeaven'':
** The entropy magic sphere is associated with Agares, the leader of the Evil gods, and its spells relate to decay and corrosion. Entropy magic nodes act as a source of [[PhysicalHell Hell Terrain]], and any mage who uses the magic [[EvilIsNotAToy will come back to life as a slave]] of TheLegionsOfHell upon death, regardless of their nation's alignment.
** The chaos magic sphere is a flavor 1 chaos type and is associated with [[WarGod the god of war]] (in a [[AnarchyIsChaos anarchistic]], [[TheSocialDarwinist everyone-fights-everyone]] sense), who is a fallen, evil god as well.
* ''VideoGame/HeroesOfMightAndMagic IV'' has a spell school literally ''called'' Chaos Magic, and consists mostly of direct damage spells. ''Heroes of Might and Magic V'' has an entire school devoted to destructive spells, as well (and it's even called Chaos Magic in the Russian translation).
* ''VideoGame/LordsOfMagic'''s chaos faith uses flavor 1 spells.
* The OptionalBoss and TrueFinalBoss of ''VideoGame/TheReconstruction'' has "Chaos" as their element, as opposed to a certain optional character with "Order" as his element. Both end up effectively NonElemental.
* ''VideoGame/TheSecretWorld'' has Chaos Magic, which incorporates both increases in entropy and manipulation of probability.
* ''VideoGame/TalesOfMajEyal: Forbidden Cults'' has the Cultist of Entropy class, which can do things like inflict rapid aging on enemies, extend the duration of negative effects, and tear rifts in reality. Their spells cause them to accrue entropic backlash that causes damage over time, but their SignatureMove is to gift their entropy to an enemy.
* ''VideoGame/{{Warcraft}}'': Several names of demons are based on the word Entropy. Demons in ''Warcraft III'' use chaos magic, and also have a number of "chaos" spells.
[[/folder]]

[[folder:Webcomics]]
* "Entropic Acid" is used to destroy a {{nigh invulnerab|ility}}le parasite in ''Webcomic/TheDragonDoctors''. There's also been mention of an "Entropic Zone", a dimension where life forms age and objects decay at an accelerated rate.
* Zintiel from ''Webcomic/FlakyPastry'', [[PersonalityPowers whose personality is as chaotic as her magic]].
[[/folder]]

[[folder:Western Animation]]
* ''WesternAnimation/MiraculousLadybug'': Ladybug and Chat Noir's powers are chaos-related, although Ladybug's ultimate power (the Miraculous Cure) is an inversion, allowing her to undo the chaos, damage, and destruction caused by an enemy. Chat Noir's Cataclysm is a straight example, bringing all the forces of decay to bear on a single object, reducing it to dust in a split second; some fanworks refer to the effect as "accelerated entropy".
* ''WesternAnimation/MyLittlePonyFriendshipIsMagic'':
** Discord's raison d'etre. He's a chimeric spirit of chaos, and wields powerful magic that he primarily uses to create bizarre items, creatures and events. He literally ''has'' to be chaotic or he starts to disappear. He initially appears as a villain but eventually makes a HeelFaceTurn thanks to Fluttershy and the Mane 6 (mostly Fluttershy), although afterwards he retains a mercurial personality and a preference for using his chaos magic to play bizarre pranks and indulge his peculiar sense of aesthetics.
** When Discord's chaos magic is stolen in the GrandFinale, [[spoiler:Cozy Glow]] tries to use it and is unable to, only able to summon hangry pineapples and rubber chickens. This is spelled out by [[spoiler:Tirek]], who notably managed to [[ManaDrain steal Discord's magic]] himself [[Recap/MyLittlePonyFriendshipIsMagicS4E26TwilightsKingdomPart2 once]] but used it more for the general power boost rather than any of Discord's brand of chaos. Later, [[spoiler:Pinkie Pie]] temporarily gains Discord's chaos magic and is actually able to control it enough to make a giant cupcake slam onto the villains, although she quickly [[WithGreatPowerComesGreatInsanity goes mad with power]] until Discord takes his magic back from her.
--->''"I COULD TRANSFORM THE COSMOS SO EVERYTHING IS MADE OF ICING!"''
[[/folder]]
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