[[RealityWarper Reality warping]] is a cool power, isn't it? Definitely. But here is the catch. It can make your dreams come true, but [[LiteralGenie not all dreams are good]][[note]](Let's not even get into ''nightmares)''[[/note]]. So what happens when a [[WeakWilled weak-willed]] paranoid person becomes a Reality Warper? Things go [[GoneHorriblyWrong Horribly Wrong]] pretty quickly -- suddenly the monsters under your bed are real, your ImaginaryFriend becomes an ImaginaryEnemy, all ParanoiaFuel becomes real, and in the worst case scenario, you could end up in a SelfInflictedHell.

Even a strong-willed person will have trouble with winning this SuperpowerLottery; PowerIncontinence due to subconscious slips are no less likely for TheDeterminator with HeroicWillpower, and [[HowDoIShotWeb minor carelessness or forgetfulness]] can have disastrous consequences. Just how exactly do you practice Warping Reality without risking messing up the world you live in? Worse, reality warping doesn't necessarily provide a defense for consumption of drugs[[note]](at least not until the character can manage atomic-scale perception and manipulation)[[/note]], MindControl, or simple [[ManipulativeBastard psychological manipulation]]. Too bad you can't get ticketed for "Reality Warping Under The Influence".

Often used as a FantasticAesop on why only select people like {{God}} can have such power. See also BeCarefulWhatYouWishFor.



[[folder:Anime and Manga]]
* In ''Manga/{{Bleach}}'' the [[ArtifactOfDoom Hogyoku]] stretches the rules of probability to let its owner achieve his heart's desire. For Sousuke Aizen, the desire is power and for most of the series it works fine for him -- he becomes TheJuggernaut capable of curbstomping most of the remaining staff combined. The problem is, he associates humans (including shinigami) with weakness... while he is in control of the situation, he stays close to BishonenLine. But once he meets his equal and suffers a VillainousBreakdown, the artifact dutifully fulfills his wish for more power, by "evolving" him into a full-blown EldritchAbomination. [[spoiler:Eventually, it takes away Aizen's powers, and Ichigo speculates that [[IJustWantToBeNormal Aizen subconsciously wanted that all along]], [[LonelyAtTheTop feeling isolated due to his intense power]].]]
** In The Thousand-Year Blood War arc, we have [[spoiler:Gremmy Thoumeaux, the "V" (the "Visionary") Sternritter, who has a ''literal'' ImaginationBasedSuperpower, whatever he can imagine becomes reality (though the changes he makes can revert if he doesn't continue to focus on them). This ability, powerful as it is (there's a ''reason'' this guy [[ArrogantKungFuGuy claims to be the most powerful of his compatriots]]) nearly ''kills'' him when he nearly imagines Kenpachi killing him. In the end, he's killed when he tries to imagine himself stronger than Kenpachi, but because he also perceives Kenpachi as an unstoppable monster, he gets stronger and stronger until his own body can't handle the strain and tears itself apart. Turns out that when everything you imagine becomes real it's a ''really'' bad idea to try to imagine two mutually contradictory things. Kenpachi immediately realizes what happened and remarks, "WhatAnIdiot."]]
* In ''[[LightNovel/HaruhiSuzumiya The Disappearance of Suzumiya Haruhi]]'', [[spoiler:Yuki Nagato rewrites the last 365 days of the year, causing everyone in the SOS brigade to be normal.]] Kyon's character development shows when [[spoiler:he's forced to choose on whether he wants to keep the normal life or the eccentric, adventure-filled one.]]
** Although that instance was deliberate. The random changes Haruhi imposes on the world while filming a movie and losing track of the distinction between reality and fiction are a better example.
** There's also the general fact that the entire reason for the {{Masquerade}} is that they're afraid that if Haruhi finds out, it will all get much, much worse.
* In ''Manga/FrankenFran'', a bullied boy is given a treatment that allows his body to adapt to his thoughts, reforming according to his whims, but also instincts and self image. He is mostly happy with it, but when he gets depressed... well, considering the rest of the chapters, he got let off easy, but still...
* In ''LightNovel/ACertainMagicalIndex'', the villain of the second arc has an apparently unbeatable Reality Warping power but is defeated by making him lose control of his fears, whereupon he accidentally makes the hero invincible and monstrous.
** [[spoiler:However, given revelations in the later books, this may not actually be the case. It is strongly implied that the reason Touma manifested those powers was not due to Aurelius' abilities, but rather a result of having his arm cut off, as it suppresses [[SealedInsideAPersonShapedCan an extremely powerful entity sealed inside Touma]].]]
* The entire plot of ''Anime/{{Pokemon 3}}'' is a result of this trope and LivingDream. Unowns abduct Molly's dad. Molly wants dad back. Unowns turn dad into Entei and cover the estate in crystal. Chaos ensues.
* In ''LightNovel/IsThisAZombie'', Eucliwood briefly transfers her incredible powers to Ayumu. He is warned not to let his mind wander, but then he inadvertently causes every woman in the area to suddenly be in a bikini. They angrily beat him up.
** The reason why Eucliwood doesn't change reality all the time is because she's very disciplined, always keeping her emotions in check and rarely ever speaking. This very much leans towards CursedWithAwesome for her as she really doesn't want to hurt people with her powers, but does so by accident.
* In ''Literature/FromTheNewWorld'', everyone has extremely powerful psychic powers, which can do anything from telekinesis to altering a creature's genetic code. The bulk of the series focuses around what happens when people suffer mental illness, develop PowerIncontinence, and the side effects of subconscious fear. Contrived religious ceremonies and SocialDarwinism are required to keep people's conscious and unconscious minds from wreaking havoc; despite this, [[spoiler:most of the world is a wasteland populated by the horrific manifestations of humanity's nightmares,]] and occasionally an unstable person slaughters hundreds or thousands of people (''billions'' died when these powers first surfaced).
* The witches of ''Anime/PuellaMagiMadokaMagica'' are a result of [[spoiler: individuals able to use magic succumbing to their own despair and ultimately setting their magical abilities loose, creating a frightening dreamworld centered around their obsessions or regrets and manifesting hordes of minions that futilely try to satisfy the wishes of their master]]. {{Muggles}} who wander inside by accident are quickly rendered dead, insane, or slaves to the witch. And according to [[Anime/PuellaMagiMadokaMagicaTheMovieRebellion the movie]], [[spoiler: the witches don't even revel in their insanity; they suffer throughout due to being able to [[AndIMustScream understand their own condition but unable to do anything about it]]]].

* In the IntercompanyCrossover ''Franchise/{{Batman}} Vs. TheIncredibleHulk'', ComicBook/TheJoker gets the power to warp reality. Everything melts, buckles, and shifts... and then goes back to normal. It turns out that his mind was so unstable he couldn't wield or even hold on to the power for more than a few inconsequential minutes.
** Actually Batman challenged Joker about how lacking in creativity he'd been so far taunting him with a BatmanGambit to get him to unleash his full imagination, but going that far Joker finally goes "I never imagined..." and when he does the Shaper Of Worlds promptly ceases giving life to Joker's whims leaving him defeated.
* Aaand then, in ''ComicBook/EmperorJoker'', it happens again. Except this time, it's Mr. Mxyzptlk's RealityWarper powers, which Joker ''could'' control with ease. Reality turns into bubblegum under Joker's thrall. In the end, he's defeated [[spoiler:because he can't imagine reality without Batman, making it ''his'' universe, not the Joker's.]]
* This tended to be the focus of the stories with the original comic book series of ''ComicBook/TheMask''.
* In one [[Creator/MarvelComics Marvel comic]], Beyonder rants about being BlessedWithSuck. He is a literally omnipotent reality warper -- his every thought defines reality around him. While it never directly works against him, it means he cannot really experience anything, since everything becomes what he expects -- he literally lives his life surrounded by nothing but figments of his imagination.
** This more applies to Doctor Doom after having stolen the Beyonder's power in ComicBook/SecretWars. He dare not sleep otherwise his thoughts will alter reality. When he does eventually fall asleep, he subconsciously resurrects the heroes he just killed.
* In ''ComicBook/{{Thorgal}}'', Jolan's ImaginaryFriend Alinoe gets warped by his anger and not only turns against him but becomes TheVirus.
* The ''ComicBook/TomStrong'' story "Tom Strong's Pal, Wally Willoughby" is about a pathetic nerd with unknowing reality warping powers whose rage and self-loathing nearly destroy a city.
* There is an inversion in a ComicBook/FantasticFour story when a middle aged milquetoast has the mutant power of omnipotence… but being a milquetoast, he always caves to other’s needs and therefore, never realizes he had it... in that issue, Earth is devastated by a gravitational pulse from Ego the Living Planet, and when he sees the Fantastic Four flying into space to deal with Ego he assumes they're fleeing Earth and he wishes things were as they were before, his power burns out in the process of reverting Earth to how it was prior to the attack (although it doesn't recall the FF).
** Played straight with Franklin Richards, whose powers often cause more harm than good, due to him being a child and unable to control them properly. However, once he grew up things were a different matter, as he resurrected Galactus and saved the Earth from the Mad Celestials.
** Also played straight with a young mutant named Willie Evans Jr, who absorbed ambient cosmic energy to power his ability to warp reality. In his initial appearance he was feverish and dying from power overload and created evil counter-parts to the FF, after he was drained of the excess his father foolishly ignored the offer of taking him to Professor X for training as a result his subconscious manifested a talking frog (based on the singing frog from the old WB cartoons) that contained his negative impulses and revealed it has killed his mother through a car accident when he's seen again. He ends up dying trying to contain it (although it's revealed to have survived somehow but presumably now powerless).
* In ''ComicBook/YoungAvengers'' ''#4'', Loki suggests to Teddy that the only reason he met and fell in love with Billy is because Billy's powers made it happen. Teddy protests that Billy would never have manipulated him like that. Loki explains that whims and daydreams are all it takes, and Teddy is a "very lovely daydream". [[spoiler:Issue 12 reveals that Loki isn't immune to this either. Most of the villains in this run are actually his self-loathing given form when he briefly wielded Billy's powers.]]
* ''Galacta: Daughter of Galactus'' posits that the X-factor actually grants the same power to all mutants: reality warping. The problem is that most of them can't actually control it, so they unconsciously warp reality in different ways that manifest as their mutant powers.
* An ''Impulse''arc dealt with this. Impulse gets possessed by a genie that imbues him with unlimited magical powers. He changes the world and tries to make it better, but inadvertently making worse. For example, having cars run on water instead of gasoline, getting rid of pollution, but with the effect of countries now going to war over water rights instead of petroleum.
* Briefly discussed in ''Alala, les télémorphoses'', a picture book for children, [[WhatDoYouMeanItWasntMadeOnDrugs which was made on drugs or not.]] Alala can "jump" into TV programs and wreak havoc on them, and Alalas parents are not happy with her choices: "{{Film/Barbarella}} is no [[ThatCameOutWrong playmate]] for little girls!"

* In the ''Fanfic/ProjectDarkJade'' fanfic ''Fanfic/QueenOfShadows'', Shendu tried to use the RewritingReality powers of the Book of Ages to reshape reality/history to better suit him, like in canon, but lost control of the outcome thanks to Jade's interference.
* It's PlayedWith within yoshi3000's Blackthorn fanfics, with certain members having less control over their abilities causing the worlds they enter to distort and change.

[[folder:Films -- Live-Action]]
* The Krel from ''Film/ForbiddenPlanet'' built a machine that could create whatever they wanted from the power of their own minds, but even so advanced and philanthropic a race weren't immune to the monsters from their ids.
* The title object in ''Film/{{Sphere}}'' gave those who went inside it this ability. From teleporting a spaceship to the bottom of the ocean and hundreds of years back in time, to manifesting giant killer squids. Bottom line, lots of people die.
* Just one of the many lessons that the title character of ''Film/BruceAlmighty'' is forced to learn when he gets God's powers. At first, he spends his time getting everything he'd ever wanted: Lots of orgasms and big boobs for his girlfriend, his dream job, revenge on people he doesn't like, but eventually his world starts to turn against him, as he realises that running the world is harder than it looks.
* This is the primary plot twist in ''Film/{{Altitude}}''. It turns out that Bruce is inadvertently causing all the events, unconsciously summoning the tentacle monster from his comic book into reality. With Sara's help he eventually learns to control his fear and summon them back to their own reality.
* ''Film/OverdrawnAtTheMemoryBank'' has Aram taking advantage of his personal Holodeck to do things like have female co-workers have sex with him, earning him a WhatTheHellHero from Apollonia.
* In ''Before I Wake'', 8-year-old Cody's dreams become reality, much to the shock of his new foster parents. While it starts out with butterflies appearing out of nowhere, he mentions a monstrous "Canker Man" that appears in his dreams as well.

* Nearly OlderThanRadio, in Creator/HGWells' 1898 short story, "The Man Who Could Work Miracles". George Fotheringay discovers he can work miracles; he can wish anything to happen and it does. [[spoiler: He wishes the sun to not set, causing the Earth's rotation to instantly stop, sending everything on the planet's surface flying. He wishes to survive this, then very carefully wishes for a ResetButton back to the moment he discovered his powers and that he wouldn't have them.]]
* Both implied and applied (the last couple of pages of ''Blood of Amber'', and the beginning of ''Sign of Chaos'') in the Merlin cycle of Creator/RogerZelazny's ''Literature/TheChroniclesOfAmber'', this is the reason that they don't take hallucinogenic drugs. Or, at least, not ''more than once''. Everybody's tried them -- it's just that this also turns out to be the reason [[DeadlyDecadentCourt nobody bothers to mention the result to newcomers]]. To be more specific, the characters don't have the ability to ''change'' reality per se -- it's merely that all realities exist side-by-side simultaneously, and they have the ability to travel between them by picturing where they want to go. Altering your mental state is thus likely to put you in one of the less pleasant realities, and the farther away from your home reality you travel, the worse your chances of ever getting back again.
* In ''Literature/TheVoyageOfTheDawnTreader'' from ''Literature/TheChroniclesOfNarnia'' series, the heroes' ship gets lost in a dark fog at sea. As they approach a mysterious island, they meet a lone survivor from a previous expedition, who warns them that this is the place "[[ExactWords where dreams come true]]". At first, most of the crew are elated, but once they realize that this doesn't mean wishes or daydreams, but ''[[OhCrap actual]]'' [[NightmareFuel dreams]], they leave with all haste.
-->There was about half a minute's silence and then, with a great clatter of armour, the whole crew were tumbling down the main hatch as quick as they could and flinging themselves on the oars to row as they had never rowed before; and Drinian was swinging round the tiller, and the boatswain was giving out the quickest stroke that had ever been heard at sea. For it had taken everyone just that halfminute to remember certain dreams they had had—dreams that make you afraid of going to sleep again—and to realize what it would mean to land on a country where dreams come true.
* Creator/UrsulaKLeGuin's novel (and TheFilmOfTheBook) ''Literature/TheLatheOfHeaven''. George Orr's "effective dreams" cause him (and the rest of the world) a lot of problems, especially when his psychiatrist starts trying to use him to improve the world. It's worth noting that ''The Lathe of Heaven'' was Le Guin's homage to/pastiche of Creator/PhilipKDick.
* Also from Le Guin, her ''Literature/{{Earthsea}}'' wizards are capable of reality warping through use of the [[LanguageOfMagic Old Speech]] and [[IKnowYourTrueName true names]]. However, since ''everything'' has a name, which it sometimes shares with other things, and assorted other elements of the cosmic balance, wizards are wary to actually ''use'' this power. One story of a wizard who wasn't ends up with him being condemned by the gods to shovel the salt he had accidentally extracted from the ocean (''all'' of it)... and the gods, being [[JerkassGods the gods]], [[CoolAndUnusualPunishment keep him alive so that he can actually finish the job]].
* There was a short story describing a man in a psychiatric hospital, who developed reality-warping powers. He spends the story exploring his abilities, watching humanity and moving them like pawns. Until he squishes one pawn that wouldn't move... only to realize it was himself.
* An alien species called the Assiti, whose "art" involves restructuring Quantum String fragments, are behind the relocation of Grantville, West Virginia in the year 2000 to Germany of the year 1632 in the ''Literature/SixteenThirtyTwo'' novels. They didn't plan on moving a town backward through time... they were just being artistic and an inferior species got caught up. The Assiti are later wiped out for being careless with their toys. In a twist, the problem with their carelessness was not that the reality warping caused Bad Things to happen to them, but that other species got tired of warning them to cut it out and be a bit more responsible.
* Pretty much the plot of the Creator/MichaelCrichton book ''Literature/{{Sphere}}''.
* ''Literature/LabyrinthsOfEcho'' had the protagonist who have ''all'' his true wishes come true "[[BeCarefulWhatYouWishFor sooner or later, one way or another]]" -- Max survived only due to being too scatter-brained to concentrate on seriously willing anything and very afraid of dying. The magic with talent and will required, but control and understanding optional gives borderline cases. "Horror of Mages" happens when a powerful wizard is very afraid of a thing that doesn't exist -- it may become real; bad news: such a phantasm can be destroyed only by its creator, who can't do it while afraid, and seeing one's personal nightmare approaching for real doesn't help. Mages with bad self-control sometimes have dreams reflecting into reality -- so if one dreams of scorching a building, well, let's hope there was no one inside. The Echo's ex-BigBad not only "demolished whatever offended his taste without leaving his bed", but had babies just ''appearing'' near his mistresses [[SomeoneToRememberHimBy who wanted such a "souvenir"]] -- "Loyso's children" weren't normal humans.
* ''Literature/TheEyesOfKidMidas'' has an [[OrdinaryHighSchoolStudent Ordinary Middle School Student]] gain access to RealityWarping powers. It's all fun and games until he forgets himself and tells his rival to [[RhetoricalRequestBlunder "Go to Hell."]] Then the RealityBleed starts to set in. And it turns out to be AddictiveMagic. And then [[PowerIncontinence he starts to lose control]]. And ''then'' he accidentally [[spoiler:[[TimeStop stops time]]]] right before [[spoiler:the glasses break]].
* The central argument of ''Literature/OfTwoMinds'' is over how much and how often reality warping can be safely used. [[spoiler:Conclusion: Less often than the heroine uses it.]] The sequel takes this a step further, arguing that a society where everyone is free to reshape the world is ultimately boring and unsatisfying. That said, the heroine rejects this Aesop, arguing that there ''must'' be an alternative to the boredom of normal life.
* In ''Literature/WitchWeek'' by Creator/DianaWynneJones, Charles enchants his hated classmate Simon so that everything he says is true, with some rather horrific results: he turns a girl's hand to gold and then temporarily makes it disappear altogether, and by saying "I'm not thinking of anything!", he makes himself mindless. It's pointed out that he's rather a silly person and it's pure luck that he hasn't said "Two and two are five" (or, come to that, "This pencil is a stick of dynamite" or "I don't exist".) Another classmate gets him to say "Nothing I say came true, and nothing I say will come true in the future", but this of course just inverts his reality-warping powers (and makes them less predictable). Eventually Charles is forced to admit both that it was wrong to cast such a spell, and that even if it weren't, Simon is the last person he would want to have that kind of power.
* In the original ''Literature/{{Mistborn}}'' trilogy [[spoiler: The Lord Ruler when he was wielding the powers of the Well of Ascension]] and then in Hero of Ages [[spoiler:Vin gives it a whirl only to realise she's doing more bad than good]] and right at the end of it all [[spoiler:Sazed comes out of nowhere (Er, sort of) and does what his predecessors could not by rewriting the entire world to the absolute point where it was previously before the Lord Ruler screwed the entire planet]]
* In the ''Literature/ColdfireTrilogy'', the ''fae'' of the world of Erna reacts to the minds of the people who live there, making everyone on the planet reality warpers. It's particularly sensitive to fears, as those are much harder to keep your mind from fixating on and the first sign of one's fears becoming true only intensifies them, giving the ''fae'' more to react to. The only reason that humanity has survived on Erna into the present day of the books, even with their level of technology stagnated by 1000 years, is because [[spoiler:the leader of the colonists who originally crashed on Erna in the backstory sacrificed their ship and all of its knowledge (the ''fae'' responds to sacrifice) to create the FunctionalMagic system that allowed humans some measure of control over the ''fae''.]]
* In the "B" Storyline of the ''Literature/GiveYourselfGoosebumps'' book "It's Only a Nightmare", you are able to control your dreams by (in a sense) "wishing" in your mind what happens next, but [[YourMindMakesItReal your dreams have an effect on you in the real world]], and can even kill you (ItMakesSenseInContext). To make it worse, each dream is controlled by your thoughts first, so it is possible to just randomly think of something, and have that come true even though you didn't really want it to.
* In ''Literature/TheWheelOfTime'', when RealityWarper and FisherKing ''du jour'' Rand is crazy and suicidally depressed, people die by freak accident and food, already in short supply, becomes rotten much more quickly than normal. When he has an epiphany and gets a new outlook on life, people ''escape'' death through freak happenstance and rotten food becomes fresh.
* In ''Literature/SabinaKane: Red-Headed Stepchild'', wizard Adam Lazarus cautions the eponymous half-mage, half-vampire that use of magic inherently disturbs the natural order, and even small castings have unforeseeable effects elsewhere in the world (usually imperceptible effects, but it ''has'' an effect). Large castings have been known to cause natural disasters.
* In the ''Doctor Who'' novel ''The Sorcerer's Apprentice'', a really advanced race developed a swarm of nanobots capable of virtual reality-warping. [[spoiler: One of them idly wished for some more color in the night sky, and the nanobots complied by ''triggering a supernova''. This drained the system of energy for some years, during which the race suffered from brutal culture shock from which they never recovered. Afterwards, a lost human colony settled in the same planet, and mistook the recovered nanobot network for FunctionalMagic.]]
* ''Literature/ChasingTheMoon'': Diana learns that constant borderline omnipotence is something you ''really'' don't want. [[spoiler: It's pretty nifty for making a substitute moon though, and [[NoOntologicalInertia deliberately keeping it around]] conveniently eats up all her excess magic]].

[[folder:Live-Action TV]]
* ''Series/BuffyTheVampireSlayer'' Anya's necklace allows her to do this in "The Wish" but it backfires and she loses her powers.
* ''Series/RedDwarf'', "Better Than Life": When the crew enter the Better Than Life video game, Rimmer's power to make things 'better than life' simply ends up sabotaging the game for all involved, as his subconscious won't let him be happy.
* ''Franchise/StarTrek'':
** One episode of ''Series/StarTrekTheNextGeneration'' sees Enterprise blown all the away to the edge of the universe (a freak accident with an experimental engine upgrade). The laws of reality are pretty loose there, and so the crew spends most of the episode trying to avoid bringing their imaginations to life (which is a lot like trying not to think of pink elephants) while the technical crew tries to replicate the accident to send the ship back.
** In the ''Series/StarTrekTheNextGeneration'' episode "The Survivors", one of the titular survivors is an immensely powerful being wracked with guilt after wiping out an entire race of invading race of aliens in a fit of rage.
** Another ''Star Trek'' example: in the ''Series/StarTrekTheOriginalSeries'' episode "The Squire of Gothos", Trelane is a godlike alien reality warper who creates new worlds to suit his whims. He torments the Enterprise crew with his powers, but just as he's about to kill Kirk, his parents show up and remonstrate him.
** Another ''Star Trek'' example in the ''[[Series/StarTrekTheOriginalSeries Star Trek: TOS]]'' episode "Charlie X." The teenage boy Charlie has these powers. Suffice it to say, his powers cause serious problems for the Enterprise crew until the EnergyBeing aliens take Charlie away.
** ''Series/StarTrekDeepSpaceNine'' gets into the act with "If Wishes Were Horses". It turns out the NegativeSpaceWedgie that threatens to destroy the station only does so because the crew find a sort-of similar occurrence in their records and ''expect'' it to. Also Rumpelstiltskin and a [[ImAManICantHelpIt submissive Daxelganger]] show up.
* Cole in ''Series/{{Charmed}}'', when he was promoted to an avatar. He created a world where he was married to Phoebe, but she hated him, and to add injury to insult, he became Balthazar again, thus getting himself killed rather easily.

[[folder:Tabletop Games]]
* Subverted in ''TabletopGame/MageTheAscension'', of all places. The Marauders (the only faction prone to warp reality without explicitly meaning to) usually like what they get. Then again, they are all clinically insane. Played straight with the normal mages, though. Doing too much paradoxical magic results in the universe backlashing, which is not fun.
** It's also why the various tools and mechanisms of magick are necessary for new mages. They can't accidentally affect reality because, at lower levels of [[PowerLevels Arete]], a mage "knows" that they can only change things through a focus. With greater mastery comes the realization that the tools are unnecessary -- and the control to manage without them.
* In ''TabletopGame/HcSvntDracones'' Transcendent implants work by harnessing [[http://cuiltheory.wikidot.com/what-is-cuil-theory Cuil Theory]] and abstract reality. When implanted they have a Cuil level of 1 to 5, when an implant of Cuil 3 or higher is activated there's a good chance that the owner will die messily: A Translocation Implant could suffer a TeleporterAccident, while an Exciter implant could set yourself on fire, etc. While Cuil 5 implants are just instant death to activate, you [[ChunkySalsaRule just can't survive it]]. And Transcendent implants temporarily go up a level each time they're used in combat.
* ''TabletopGame/Warhammer40K'':
** The Orks' quasi-psychic field that [[ClapYourHandsIfYouBelieve makes things work according to how the Orks think things work]] usually works in their favor (in fact, the only reason such an ability isn't utterly broken is that Orks are ''stupid''). However, in at least one case it's backfired on them: when Sebastian Yarrick slaughtered an unbelievable number of Orks, the Orks began thinking of him as an unstoppable Ork-killing machine... which, thanks to their powers, whenever he goes up against Orks, that's exactly what he becomes. [[spoiler:Bad things happen when an Ork manages to become a Beast, the most powerful of their kind. A Beast's influence on the rest of the Orks vastly increases their strength and intelligence. The above part about how the Orks' stupidity keeps their Waaagh! Energy from being utterly broken? Yeah.]]
** The main reason psykers are so hated and despised throughout the Imperium in a way that would make X-Men Muggles proud is that if they lose control of their powers, they become easy prey for Chaos, and daemonic incursions are sure to follow. Thus the Inquisition is extremely diligent in finding psykers before they start exploring their powers, hauling them off in Black Ships crewed entirely by anti-psykers to be brought before the GodEmperor, where their souls are either too weak and serve to keep him alive a little longer or undergo MindRape that leaves them in slightly better control of their powers.

* Hemah in ''VideoGame/FallFromHeaven''. His civilipedia description involves creating extremely dangerous monsters while dreaming. It's implied that the [[EldritchAbomination Octopus Overlords]] are his creation.
* ''VideoGame/FirstEncounterAssaultRecon'' is one big hammer with the trope's name engraved on the head. [[BigBad Alma]] was born a powerful psychic, but sensitive to negative emotions -- not only did she feel them herself more than usual, she created and propagated them in others, too. Then her father locked her up to create more telepathic children. She bore decades of horrific abuse and suffering, and then she died. But her sheer concentration of hatred and power meant that death had no effect on her at all. Result: insane, uncontrollable, homicidal psychic presence with the mind of an abused young girl that bends reality and ''cannot be killed'' -- and her own powers and creations aren't completely under her control. For example, the Creep is one of her creations, yet she fears it more than anything else because [[spoiler:it's the embodiment everything she despised about her father, Harlan Wade.]]
* In many incarnations of ''Franchise/TheLegendOfZelda'' franchise, the evil Ganon steals the Triforce, the relic of the Golden Goddesses that contains their power and is a reminder of how their world was created. It exists in the Sacred Realm and grants the wish of whomever touches it, altering the Sacred Realm to reflect that person's heart. In ''A Link to the Past'' specifically, because Ganon's wish was evil (to rule everything), the Sacred Realm was altered into the DarkWorld. In ''Ocarina of Time'', Zelda claims that this happened because Ganon had only the Triforce of Power. Without the complete Triforce, Ganon could not control the power of the gods to grant his wish.
* In the ''Videogame/AlanWake'' series, the protagonist and his fellow creatives, granted MagicWriting abilities by proximity to Cauldron Lake, an EldritchLocation, all learn the hard way that they're unwittingly playing directly into the ambitions of the Dark Presence, its resident EldritchAbomination, which aims to become a {{Humanoid|Abomination}} one, using PlotHoles and ambiguities in their works as a pretext.

[[folder:Visual Novels]]
* In the VisualNovel/{{Nasuverse}} Reality Marbles are a form of magecraft that allows the user to temporarily force the world to conform to his own vision of reality. The Magus Association has banned research due in part to the danger it poses to those researching it.
** As Shirou learns in ''VisualNovel/FateStayNight'', even the practice of developing the RequiredSecondaryPowers needed to realize their inner world is considered terrifyingly dangerous (it's disturbingly close to self-elimination); everyone who sees his [[TrainingFromHell daily training]] worries for his life, and the fact that he doesn't think much of it [[{{Foreshadowing}} is an early clue]] that he's beyond help.
** Case in point: ''VisualNovel/FateStayNight'' has Shirou's Reality Marble, Unlimited Blade Works. In Heaven's Feel his use of Archer's arm causes his Reality Marble and Archer's to come into conflict, slowly destroying Shirou's body. [[spoiler:Even though Shirou and Archer are [[FutureBadass actually the same person]] and have exactly the same Reality Marble, Archer is a version of Shirou who ceased to be human and thus their powers are incompatible.]]

* The WebComics ''Webcomic/{{minus}}'' plays with this trope constantly (the main character being a young girl with nearly omnipotent RealityWarper powers) but the biggest example comes at the very end with innocent little minus [[spoiler:accidentally killing everyone on the planet by, ironically, resurrecting everybody who ever died (mass suffocation ensues as the earth is covered in layers of people and animals)]]. It's played for laughs, though, because [[spoiler:everybody decides to just create a utopia in the afterlife, and eventually the ghosts turn Earth into a theme-park [[ResetButton based on how things used to be]].]]
* A minor example in ''Webcomic/{{Misfile}}''. A fortune teller is in a relationship that turns sour through a series of bizarre coincidences. [[spoiler:It turns out that her playing with magic has coalesced her anxiety into a [[LivingShadow sentient being]] that seeks to make her fears come true.]]
* In ''Webcomic/OneOverZero'', this occurs with both the author and the characters, which two of them hop from the author's given world into their dream worlds. This comes back to bite them when, since these characters can create anything they want, nothing's unexpected and it becomes boring, to which the author pulls them out of the dream.
* In ''Webcomic/{{Endstone}}'', apparently the discovery of the God of the Spire. Though he may have warped a LotusEaterMachine.
* There is a highly meta example in ''Webcomic/{{Roommates}}''. The cast members are fictional characters their reality is their {{canon}} and {{fanon}} story and every single storyteller ever unknowingly warps it. If they mess up the result won't be pretty... Poor [[KingArthur Morgan (Morgause/etc.) The Healer (LaFay/etc.)]] is more than bipolar by now.
* In ''Webcomic/GunnerkriggCourt'' Reality Warping is no fun at all for Zimmy. She has terrible PowerIncontinence, and in fact can't control her powers even a little. Confusing hallucinations, hideously nightmarish monsters, and nonlinear time are just the start -- she has her own personal SelfInflictedHell, a nightmare mirror of Birmingham, England inhabited by [[TheBlank faceless]] "nobodies," where she can easily become trapped. Fans sometimes call it Zimmingham or Birminghell, but it's no laughing matter. The only things that even partly give her a break are rain, and the proximity of her psychic friend Gamma.
** WordOfGod says that she has the same sort of power as deities like Coyote, but without the RequiredSecondaryPowers.
* PlayedWith in ''Webcomic/APTComic''. It is a toy, but makes things too easy and not fun enough to be utilized most of the time (according to Ammika, at least).
* According to ''Webcomic/SaturdayMorningBreakfastCereal'', this is both God's power and the reason he seems much more absent than in the early bible. Whenever he had a violent or bad thought, it manifested. Hell was a crazy judgement scheme he came up with when someone was annoying, and then it was too late. So he stopped thinking bad thoughts, but that made him just introspective and passive, so he no longer acts.
* In ''Webcomic/{{PS238}}'', this is a lesson that [[spoiler: Toby Marlocke, Tyler's clone that gets reality warping powers]] quickly learns. His powers mostly run on EquivalentExchange -- anything more complex than very basic super abilities (like flight) cause something else to happen. Minor effects typically just transform nearby objects, but more complex alterations of reality cause larger side-effects (like [[spoiler: attempting to give his brother powers]] ended up [[spoiler: depowering every other super in existence ''and'' giving powers to all other non-supers]]). What's worse, figuring out the side effect ahead of time requires concentration ''and'' isn't guaranteed to give all of the details.

[[folder:Web Originals]]
* In-universe, this trope is why the Wiki/SCPFoundation kills off most of the {{Reality Warper}}s it finds. Out-of-universe, it's to keep {{Mary Sue}}s off the SCP lists.
** [[http://www.scp-wiki.net/scp-239 The one]] they ''do'' keep has been tricked into thinking she's a magician with much more limited powers, like putting out fires, [[BreadEggsMilkSquick assassinating enemies of the SCP foundation]], making pretty lights... at least until she was nearly killed by her own powers (and almost taking the world with her) thanks to her fear of [[spoiler:Doctor Clef. She was so afraid of him that she thought he was planning to kill her. Her powers made that fear into reality, and he nearly did kill her.]] After she started getting creative and making up her own spells, the latest lore has her contained [[ConvenientComa more efficiently]]. The Foundation is fully aware of what this means should [[WoobieDestroyerOfWorlds she ever wake up]]...but given that this trope is the alternative they'll take their chances.
** When the reality warper is [[http://www.scp-wiki.net/scp-795 a cat]], you get to be the toy.
** [[UnreliableNarrator Supposedly]], this is the reason the Challenger space shuttle crashed. A young [[spoiler:Alto Clef]] had a stray thought about it crashing while he was watching it on TV and saw it crash. It was only later that he realized that it wasn't a coincidence. It's why he's so dedicated to hunting down Reality Warpers since [[spoiler:he knows all too well how dangerous they can be to others and to themselves]] and why he's so good at it [[spoiler:he secretly uses a bit of his own Reality Warping power to turn the odds in his favor.]]
** [[http://www.scp-wiki.net/scp-818 SCP-818]] and [[http://www.scp-wiki.net/scp-1915 SCP-1915]] are stuck in loops thanks to their powers.

[[folder:Western Animation]]
* ''WesternAnimation/BatmanTheBraveAndTheBold'':
** A lighthearted example happens to Bat-Mite. Since he was living vicariously through Batman (tossing foes at him just to see him battle), Batman convinces him to cut the middle man out and do it himself. Problem is, his imagination started running away with him and he started fighting ''all'' of Batman's RoguesGallery at once in a Dali-esque world. Batman had to talk him down / bail him out.
** In the finale, Bat-Mite decides he's gotten bored with the [[WorldOfHam hammy]], comedic show and [[MediumAwareness decides to get it cancelled]] in favor of a DarkerAndEdgier series by using his reality-warping powers to make ''TB&TB'' JumpTheShark. After Bat-Mite has succeeded in his plan, Comicbook/AmbushBug reminds him that Bat-Mite himself is too silly a character to be included in such a dark series and thus [[HoistByHisOwnPetard Bat-Mite fades into nonexistence]]. Whoops.
** It's also (perhaps inadvertantly) a perfect illustration of the FridgeHorror of such characters and why [[ExactlyWhatItSaysOnTheTin reality warping is not a toy]]. It's fun magical pranks for a while, but if they get bored with the world they can break it beyond even their own ability to restore, ''with a thought.''
* A Halloween episode of ''WesternAnimation/TheSimpsons'' had the world living in fear of an ''omniscient'' [[RealityWarper Reality Warping]] Bart. Bart only wakes up screaming from the dream after his dream-self starts turning nice and hugs Homer.
* In ''WesternAnimation/SpiderManTheAnimatedSeries'', Doctor Doom is anything but weak-willed. Yet when he tries to steal the Beyonder's power, his new utopia is soon assaulted by demons born out of his nightmares and subconscious fears. This is pretty much what happens in the original ''ComicBook/SecretWars'' comic book too, which that episode was based on.
* That happened with Cornelia's little sister in ''WesternAnimation/{{WITCH}}''. She was being read to and unwittingly making the story come true, because as the Heart of Earth, she has RealityWarper powers. They end up convincing her to seal up her powers in a trio of regents until she grows up.
* ''I Married a STRANGE Person!'': After Grant Boyer is zapped by his TV satellite dish, he starts to warp reality to match whatever he imagines, and he just cannot stop imagining.
* In one episode ''WesternAnimation/TheMask'' hides from Lieutenant Kellaway by turning himself into a character in a comicbook. When he comes out from it, he accidentally drags along with himself three supervillains of the world of the comicbook. He spends the rest of the episode trying to defeat them, only to discover that DeathIsCheap. Ultimately he ends up tearing the comicbook apart, which wipes out the villains from his reality.
* This is the basis of the ''WesternAnimation/AdventureTime'' episode "Rainy Day Daydream", when Jake's imagination takes on RealityWarping powers, without any cause. He simply chooses to imagine a machine that can turn his imagination off, but still can't keep from placing obstacles and dangers in his own path to the machine.
* ''WesternAnimation/MyLittlePonyFriendshipIsMagic'': As Spike learns a bit too late, the desire to exercise the "[[Recap/MyLittlePonyFriendshipIsMagicS4E23InspirationManifestation Inspiration Manifestation]]" power takes hold of a pony (in this case Rarity), and they can't help but use it. A crazed Rarity 'beautifies' the town into such chaos that Discord would be hard-pressed to compete with it.