->''"Do not call up that which you can not put down"''
-->-- '''Creator/HPLovecraft''', "The Case of Charles Dexter Ward"

Not all manufacturers of SealedEvilInACan use child-resistant caps.

Sometimes the Sealed Evil in a Can [[TailorMadePrison doesn't escape by itself]], nor is it released by the UnwittingPawn, but it is deliberately set free by a villain (or hero). Let's call him Bob. Bob usually thinks he can control the sealed evil, or [[DealWithTheDevil bargain with it]], expecting to trade on a certain level of gratitude on its part since he was the one who freed it.

[[GenreBlindness This never works.]]

The Sealed Evil in a Can will inevitably turn on the one who freed it -- sometimes sooner, sometimes later. In many cases it turns out to have no [[EvilCannotComprehendGood understanding of loyalty or gratitude at all]]. Bob may end up being killed on the spot, or he may be [[DemonicPossession enslaved]] by the sealed evil. The sealed evil may make a bargain that it has no intention of honoring (or it may [[FalseReassurance promise Bob he will be rewarded "as he deserves"]]... [[RewardedAsATraitorDeserves guess what he deserves?]]). Or it may simply refuse to obey him. In any case, if Bob was the BigBad before, he was really just a DiscOneFinalBoss; the formerly-sealed evil is the true BigBad. In the event that Bob survives, this is a leading cause of EnemyMine twists, since Bob now must seek any allies he can find to deal with the evil that he unleashed. In any case, in order for this trope to work the one who releases said evil can't be GenreSavvy in any way and must always have GenreBlindness.

In some cases, the sealed evil was even manipulating Bob into freeing it, and you certainly don't get rewarded just for doing what you're expected to do, especially after YouHaveOutlivedYourUsefulness. Other times, the evil being may ask Bob [[TheFarmerAndTheViper what exactly he expected]] after releasing an ''evil'' being.

This goes triple for anyone attempting to activate a hero's SuperPoweredEvilSide. Unless you are TheEmperor and would already be stronger than them, just remember: once they're evil, they no longer have any qualms about killing ''you.''

If you're a villain, [[EvilOverlordList take note]]: Sealed evil should not be released unless you expect it to betray you. Also, it should be kept away from children under 3 as it has small parts and they may choke on it.

All too often the character will [[TooDumbToLive die horribly]] within [[TemptingFate seconds of uttering]] [[YouJustHadToSayIt "Now its power is MINE!"]]

This goes both ways as sometimes Bob is the SealedEvilInACan and the villain he's trying to dupe into releasing him is the one who's not a toy (due to being GenreSavvy or simply more powerful than the SealedEvilInACan) and as such will ''brutally'' subjugate Bob the ''moment'' he underestimates the releaser.

See also ThisIsYourBrainOnEvil. If Bob created the evil in the first place, it's a case of TurnedAgainstTheirMasters. When the evil actually ''is'' a toy, it may coincide with MyLittlePanzer. If the Evil in question is the BiggerBad, expect the lesson to be particularly painful. Contrast HolyIsNotSafe, where concentrated goodness is similarly threatening.

----
!!Examples

[[foldercontrol]]

[[folder:Anime]]
* In ''Franchise/{{Digimon}}'', Ken does his HeelFaceTurn after getting a demonstration of what true evil is like. Though his HeelRealization played a big part in that.
** The beating he received, this trope being TK's BerserkButton.
* Kaolinite was instantly killed by Mistress 9 in ''Anime/SailorMoon'' upon her revival. Likewise Metaria possessed Queen Beryl in the end of the first season.
* Emperor Pilaf, the comic relief villain from early ''Manga/DragonBall'', ends up releasing evil incarnate Piccolo Daimaou to get revenge on Son Goku. Piccolo proves infinitely more competent than Pilaf ever was: not only does he kill several of Goku's friends, but he kills [[spoiler:Shenlong, the show's resident [[DeathIsCheap Get Out of Death Free Card]]. Considering there's 300+ episodes afterward, though, rest assured: he gets better]]. Pilaf and his minions end up punted out of a moving airplane. Initially, it seemed as though they had learned from their mistakes; something like 300 episodes (approx. 40+ years in show) pass before they reappear to steal the [[ArtifactOfDoom Black Star Dragonballs]]... which ends in ''the entire planet blowing up.'' ([[ResetButton Again]].)
** In ''Anime/DragonBallZ'', Dr. Gero releases Androids 17 and 18, hoping to be able to control them with a remote control which 17 promptly takes away from him and breaks. A somewhat unusual case in that Gero was the one who created the Androids in the first place, and knew that he was taking a big gamble when he activated them.
** Babidi revives Majin Buu and plans to use him to take over the world. Things don't go as planned. Initially, Buu ''does'' obey Babidi and shows no interest in betraying him, probably because he's too stupid to think of such things. Even when Babidi insults Buu and threatens to [[SealedEvilInACan re-seal him]], the clearly enraged Buu backs down. Then [[TheHero Goku]] points out that Buu is far stronger (and ''faster'') than Babidi and shouldn't take such abuse from him. Then Buu kills Babidi with a single punch to the face (which obliterates his head). The immediate consequences of Buu betraying Babidi are largely positive, since his capricious frolicking leads him to accidentally discover that GoodFeelsGood... Then a vigilante tries to kill him and nearly offs his new best friend in the process. Cue EnemyWithout.
* ''Anime/MazingerZ'' gives a textbook example. [[MadScientist Dr.]] [[BigBad Hell]] searched and found the army of [[{{Robeast}} giant robots]] that legends rumored the [[AbusivePrecursors lost civilization Mykene]] used, and thought he could control them through the rod of Rhode (a device he invented) and use them to TakeOverTheWorld. However, the Mykene civilization still existed, [[BeneathTheEarth thriving underground]]... and Dr. Hell stealing their ancient weapons drew their attention back to the surface. Oops. One of them confronted Hell, accusing him of thieving their LostTechnology and demanding he returned it. Hell tried to bargain with him, and the Mykene messenger pretended to agree, but in reality he planned backstabbing Hell as soon as possible -which he did- to allow [[TheEmpire the Mykene Empire]] conquer the surface world instead of Hell.
** He also does it in the ''Anime/{{Mazinkaiser}}'' manga (later adapted to ''Anime/ShinMazinger'') with the Kedora: Mykene bio-computers that can take over any machine. There's just one problem: The Mykenes designed them specifically to wipe out any non-Mykene civilization they found. Lucky for him, Dr. Hell had only activated one of them before he found that out, and promptly destroyed the rest.
* In ''LightNovel/{{Slayers}}'', the original Rezo found out that he would have to release Shabranigdo in order for Rezo to be able to [[spoiler:open his own eyes]]; he believes he can adequately contain the lord of all demons thereafter, seal him back up, no harm done, right? It doesn't work out that way, mainly because [[spoiler:Shabranigdo was actually sealed ''inside'' of Rezo; the very act of opening his eyes breaks the seal and allows Shabranigdo to [[DemonicPossession take over his body]].]]
** Then there is Phibrizzo/Fibrizo, who arm-wrings Lina into casting the Giga Slave, in hope that the released power of the Lord of Nightmares will consume the world. He does partly succeed... [[spoiler:the Lord of Nightmares itself is released inside Lina's body. It then promptly obliterates Phibrizzo.]]
* The {{manhwa}} ''Manhwa/{{Priest}}'' uses this in the climax of its several volume long flashback; a corrupt order of priests have succeeded in opening the Domas Porada, the "can" (and it does rather resemble one) containing the fallen angel Temozerela, believing him to be their savior. Unfortunately, Temozerela isn't too fond of humans...he kills almost the order with a single breath (he breathes at them and their heads explode), mocks the leader a bit, and them kills him by making demon faces sprout out all over the leader's body and bite him to death.
* ''Anime/HellGirl'' both subverts it and plays it straight. Ai can be summoned by humans through her website in a fairly simple manner and will kill the person she's ordered to as promised. However, as she warns you, the cost of having her do this is that you get dragged down to Hell upon your own death too. Also, over the course of the series, certain people make attempts to capture and/or control Ai for her abilities or to avoid the cost of her services, but that never works.
* In ''Anime/YuGiOh'', Pegasus takes ancient magic duels that nearly destroyed the world and resurrects them as a (''supposedly'' non-magical) card game, thereby threatening to incur the wrath of the [[OlympusMons Egyptian God Monsters]]. No wonder the game soon became SeriousBusiness. (After said gods were placated, the game continued to be a WeirdnessMagnet for all sorts of mystical forces.)
** The Seal of Orichalcos is another example. As many villains of the DOMA Arc discovered, this cursed card does ''not'' play favorites.
** In ''Anime/YuGiOhGX'', both Fubuki Tenjoin (Atticus Rhodes in the English dub) and Yusuke Fujiwara seem to have trouble grasping this concept and end up using a MaskOfPower and developing (the same) SuperPoweredEvilSide. Then there's Brron, Mad King of Dark World, who tries to defeat Juudai by forcing him into despair by killing his friends. This activates Juudai's SuperPoweredEvilSide, and does not end well for Brron. Ryo Marufuji/Zane Truesdale developed heart problems after forcing his opponents into duels in which both players wear collars that release electricity whenever the player takes damage.
* ''VisualNovel/TearsToTiara'' kicks off the plot with the evil High Priest Drwc releasing the Demon King Arawn from his 1000 years of slumber in the ''first episode''. Arawn kills Drwc shortly afterward, but instead of being the BigBad, Arawn turns out to be the NobleDemon ''[[DarkIsNotEvil protagonist]]''.
* ''VisualNovel/UminekoNoNakuKoroNi'': If setting up a family meeting just so you can sacrifice the whole lot of them to a witch to bring her back to life seems like a good idea, you probably need your head examined. Appropriately enough, Kinzo tends to be found dead on a regular basis. [[spoiler:However, it turns out to be a subversion; he's been dead for more than a year.]]
* This trope is a common theme in ''Manga/ChronoCrusade'', usually having to do with the demons. The most obvious examples are the New York mobsters that think they can use demons as hit men, and Rosette's brother Joshua, whom accepted a DealWithTheDevil to [[WithGreatPowerComesGreatInsanity have a pair of demon horns on his head]].
* In ''Manga/{{Monster}}'', various shady forces- a [[NebulousCriminalConspiracy conspiracy]] or two consisting of [[ThoseWackyNazis Neo-Nazis]], {{mad scientist}}s, and ex-SecretPolice amongst others- all want to use Johan to bring about their OneWorldOrder. Johan is also implied to be TheAntichrist. For real. As Tenma points out, he is not interested in ideas of racial or ethnic superiority, for he [[{{Ubermensch}} "laughs at all of humanity"]]. Ultimately he plays along with their plans for his own ends- namely, TheEndOfTheWorldAsWeKnowIt-, only to suffer an existential crisis and [[spoiler:murder them all as a kind of metaphorical "suicide", ''vis a vis'' erasing everyone and everything who has any significant connection to him, while planning to be shot by Tenma.]] The last part fails, but the conspirators' plan never had a hope.
* In ''Manga/{{Bleach}}'', relying on [[spoiler: the Hogyouku]] for power proves to be [[spoiler: Aizen]]'s undoing. Even though he survives [[spoiler: Ichigo's Mugetsu]] and is on the verge of attaining even greater power, [[spoiler: the Hogyouku]] is so unimpressed with his performance in the past few chapters that it no longer considers him a worthy master and depowers him. This [[spoiler: activates a kidou [[ThePlan Urahara hid inside Aizen]] which]] turns ''him'' into a SealedEvilInACan.
* In ''Manga/{{Naruto}}'' the First Hokage used his Wood Release techniques to capture several of the tailed beasts and divided them among the other shinobi villages both as peace treaties and to stabilize the balance of power. However, being monstrous embodiments of chakra energy, the villages had trouble just containing them and attempts to utilize their power often met with mixed result (like Gaara and the Shukaku).
** But completely averted with [[spoiler:Madara, who was able to use his sharingan alone to bind the Kyuubi (the most powerful of the tailed beasts) to his will and attack both the Hokage and the Hidden Leaf Village separately (along with controlling the Sanbi and its human host in a flashback). His EvilPlan involves using the seven beasts he already captured to make 100,000 Zetsu from their chakra, with the overall goal of combining all the captured tailed beasts into one colossal ten-tailed beast, become its host, and use its power to place the entire world under his control with his Tsukuyomi technique.]]
** Also averted by Killerbee, for whom the more appropriate trope would be Evil Is A Toy And Also Your Best Friend. He managed to become allies with the Hachibi, while Yugito appears to have had a decent relationship with the Nibi, which means that it makes a bit more sense for others to try it, too.
** To his credit, post-time-skip Gaara was shown to be more or less in complete control of Shukaku by the time he became the Kazekage. Whether he had made peace with it (like Killer B) or had simply worked up the willpower to completely suppress its murderous tendencies wasn't revealed [[spoiler:before the Akatsuki ripped it out of him]].
** During the [[spoiler: Fourth Shinobi World War, Naruto actually has a talk with eight of the nine beasts and discovers that not only are they all individual sentient beings with varying personalities, they were once all pretty nice. Once the Sage of the Six Paths died, however, people began treating them like monsters and they [[SelfFulfillingProphecy became monsters in retaliation.]] With Naruto treating them like people, they all offer him their support and he's able to break Kurama/the Kyuubi's seal and let him share his body as an ally. So it turns out to be Evil Responds Well To Being Treated Like A Person.]]
** Even [[spoiler:Uchiha Madara]] admits that the [[spoiler:Ten-tails]] might be difficult to control as it mutates. That said, when he finally [[spoiler:merges with it]] he has no problem handling it because [[EvilIsEasy they want the same thing]].
* In ''Anime/StarDriver'', Glittering Crux gets a taste of this in episode 14 [[spoiler:when their Maiden seeking Cybody Ayingott turns out to be an evil robotic horror that overpowers its own Driver and goes berserk. It immediately attacks the Crux leaders. Only Takuto's and Sugata's intervention prevents things from getting worse.]]
* In chapter 242 of ''Manga/FairyTail'', [[spoiler:Zancrow]] gloats about retrieving Zeref. Seconds later, he is slain by a burst of Zeref's uncontrollable "Death Magic".
** [[spoiler:Hades]] wastes no time following his example. While trying to get the proper tools to undo the seal, Zeref informs him that he's wasting his time, that he has no interest in helping create [[spoiler:Hades']] magic horror world, and also that [[spoiler:Hades]] trying to drag him into the whole thing has angered him enough to ''intentionally'' kill him.
* Alan Gabriel in ''Anime/TheBigO'' learns the hard way what happens when somebody thinks the Megadeuces are just a type of HumongousMecha. [[spoiler:Ye Guilty.]]
* In episode 3 of ''Manga/SoulEater'', a witch revives an ancient pharaoh and says he is now her servant. The pharaoh angrily eats her alive and goes back to sleep. Several groups try to manipulate the Great Old Ones, Asura in particular, and run into trouble trying to get ''personifications of human madness'' to do what they want. Medusa's more indirect attempt by [[spoiler: leading Crona down the path of becoming a replacement for Asura]] is more successful because [[spoiler: she has no intention of controlling the final outcome.]]
[[/folder]]

[[folder:Comic Books]]
* A lot of ComicBook/{{Hellboy}}'s enemies seem to think that they can use the Right Hand of Doom and [[EldritchAbomination Ogdru Jahad]] for their own ends (even Hell), while it is implied that they would merely destroy all of reality. A reoccurring theme among others who don't try to use the Ogdru Jahad. Sorcerers and witches who traffic with demons die painful deaths and are sucked down to Hell. TheFairFolk and witches revive a mad [[KingArthur Nimue]] to wage war on humanity, The results are far more horrifying then anyone expected.
* Sebastian Shaw, foe of the ''Comicbook/{{X-Men}}'', helped to develop and secure funding the [[CapeBusters mutant-hunting]] [[GiantMecha Sentinels]], figuring if he builds them instead of someone else, he can instill a RestrainingBolt to keep them from recognizing him as a mutant. This led to the Days of Future Past, a BadFuture where the Sentinels TurnedAgainstTheirMasters and waged a genocidal war on mutants everywhere.
** Another Hellfire Club member didn't fare much better. Mastermind [[MindRape learned]] TheDogBitesBack when he tried to control [[WithGreatPowerComesGreatInsanity Dark Phoenix]].
** He actually ''created'' Dark Phoenix. Jean was a bit AntiHero-ish as Phoenix and worried about JumpingOffTheSlipperySlope ''someday,'' but we don't get to ''wiping out solar systems'' until Jason Wyngarde's tampering with her made her dark side fully overcome her control, and suddenly EvilFeelsGood reigns. It's ''all'' his fault.
* In one ''Comicbook/{{Witchblade}}/Franchise/TombRaider'' crossover comic, a haughty socialite goes to great lengths to summon the goddess Bastet, without ever considering whether she could actually control a divine being. When she wishes to be kept out of prison, the goddess remarks that this is easily arranged, and sics a pet lion on her.
* Comicbook/DoctorStrange used the power of the demonic entity Zom to bolster his magics on at least two occasions. Both times the power used him far more than he used it, and after the second time he renounced both it and the mantle of Sorcerer Supreme. He didn't get his title back until years later, once he'd demonstrated that he could use dark magic without letting it get out of his control and without hurting anyone else.
* In ''Comicbook/{{Siege}}'', NormanOsborn and Comicbook/{{Loki}} realize just how badly they underestimated Sentry/Void's power and evil.
* In [[Comicbook/GrantMorrisonsBatman Batman RIP]], when the Black Glove attempts to use the Joker to finish off Batman. Joker himself tells them that they haven't come nearly as close to beating Batman as they think, and that they can't control the Joker himself. Later, after the dust has settled, Batman's won, and the Black Glove members have gone home to hide behind their money, Joker murders them all.
* [[{{Comicbook/Hellblazer}} John Constantine's]] first rule of magic: Never summon up something you can't put back down. He learned this the hard way in [[MyGreatestFailure Newcastle in '77]].
* Pretty much OnceAnEpisode in ''ComicBook/{{Vampirella}}'', someone will make a DealWithTheDevil, only to realise too late that they got more than they bargained for.
[[/folder]]

[[folder:Fan Works]]
* The ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' fanfic ''FanFic/{{Whispers}}'' implies that Princess Luna transformed into Nightmare Moon by intentionally tapping into evil magic out of bitter jealousy, apparently overestimating her ability to handle it.
* PlayedForLaughs during ''[[FanFic/TamersForeverSeries Theory of Chaos]]'':
-->'''[[spoiler: Chaos]]''': ''How is it that I'm supposed to do your schoolwork? I'm [[spoiler: CHAOS]]!! Not some sort of encyclopeadia!''
* In the ''WesternAnimation/DannyPhantom'' fanfic ''Fanfic/FacingTheFutureSeries'', Clockwork lampshades Vlad's many attempts to gain power beyond his control in his ReasonYouSuckSpeech to him. Vlad is currently trying to steal Clockwork's power over time. Subverted in this instance because Clockwork beats him instantly before Vlad can do any damage.
--> '''Clockwork''': "Vortex…the Infi-Map…Pariah Dark. Time and again, you've tried to seize control of powers beyond your meager understanding and time and again, you've met with failure. And now you come into my domain with all the forethought of a teenager looking to steal a car for a joyride and brazenly declare that you will take MY power from ME?"
* In [[http://kleinerkiller.deviantart.com/gallery/41037509 Yognapped]], [[EvilFormerFriend Peva]] frees [[spoiler: Herobrine]] from beneath the bedrock layer, planning to partner up with him and destroy Minecraftia. [[spoiler: Herobrine]] briefly considers this, before [[spoiler: scorching Peva's hand, completely obliterating his gathered troops, and going off to fulfill his own agenda.]]
[[/folder]]

[[folder:Films -- Animated]]
* In Disney's ''Disney/AladdinTheReturnOfJafar'', Abis Mal gets pressed into servitude after accidentally summoning the genie Jafar. Jafar accomplishes this by constantly threatening violence against Abis. (The hapless thief is aware that in his world, genies [[ThouShaltNotKill cannot kill]], but Jafar keeps repeating ominously, "You'd be surprised what you can live through.") Also, Jafar is the epitome of the JackassGenie, so it's not like he can make his wishes and be on his way.
* Another Disney example would be ''Disney/ThePrincessAndTheFrog''. The "[[EldritchAbomination Friends on the Other Side]]" are not at all friendly, as [[BigBad Dr. Facilier]] realizes way too late in the finale.
* Rasputin of ''WesternAnimation/{{Anastasia}}'' was so blinded by his hate for the Romanovs that he really didn't think his deal with the dark side through. Swearing "not to rest until the last Romanov is dead" unwittingly turns him into a decaying lich, then when his SoulJar gets damaged the dark forces immediately intervene to claim him and he dies absolutely horrifically, his soul likely in their possession for all time.
* In the 2009 ''WesternAnimation/AstroBoy'' movie, Stone is very enamored of the explicitly evil Red Core. [[spoiler:Experience fails to teach him that you must not play with it.]]
* In Marvel's ''HulkVS'' animated movie, Loki, in an attempt to defeat Thor, removes Bruce Banner from the Hulk and then uses magic to try and control the Hulk. This doesn't last long as the Hulk's rage soon overcomes Loki's control and the Hulk runs around destroying all of Asgard.
* In ''WesternAnimation/BatmanUnderTheRedHood'' Black Mask has some idea of what is going to happen if he releases SelfDemonstrating/TheJoker.
-->'''Black Mask''': I'm being forced into negotiating with a psychotic.
-->'''Ms. Li''': That doesn't sound good.
-->'''Black Mask''': No. It's going to be a nightmare.
** In ''WesternAnimation/BatmanMaskOfThePhantasm'', Sal Valestra enlists the Joker's help as a hitman against Batman, whom he thinks his killing off mob bosses. The Joker promptly murders Valestra to use as bait for the hit he himself ordered.
[[/folder]]

[[folder:Films -- Live-Action]]
* The ''Franchise/{{Hellraiser}}'' series shows that demonic torturers are ''never'' to be trifled with by ambitious summoners:
** In ''Film/{{Hellraiser}}'', Frank Cotton releases four demons with the magical cube, which looks quite like some toy. They don't exactly reward him, although it's technically neither a reward nor a punishment. The Cenobites' job is to bring the summoner to the heights of "pain and pleasure", at least in the first film. The summoners never really understand what they're getting into.
** Probably even more true for ''Film/HellboundHellraiserII'' where Dr. Channard's obsession with the Lament Configuration ultimately leads to him becoming horrifically tortured and turned into a Cenobite himself. He's horrified at first, but in the end...''And to think, I hesitated.''
** In ''Film/HellraiserBloodline'', The Duc de l'Isle and Jacques summon a demon princess to suit their whims. She ends up killing both of them, the Duc by seducing Jacques to betray him and disposing of Jacques when he decides to stand in her way centuries later.
* Ivan Ooze in ''Film/MightyMorphinPowerRangersTheMovie''. He traps Zedd and Rita in a snow globe shortly after freed.
** In ''[[Series/PowerRangersTurbo Turbo: A Power Rangers Movie]]'', the villainess Divatox wants to resurrect the demon Maligore and marry him to gain untold power. When she does, he starts attacking everyone, and is ultimately destroyed by the Rangers.
* In ''[[Film/TheMummyTrilogy The Mummy Returns]]'', a museum curator, Hafez, deliberately digs up and raises Imhotep, thinking that [[EvilVersusEvil Imhotep would defeat the Scorpion King]]. The fact that this would lead to ''an evil undead ruling the whole world'' apparently didn't cross the curator's mind. That or it ''did'' and Hafez figured Imhotep would let him help rule the world.
** Actually, it might have something to do with the fact that the Scorpion King was going to bring about TheEndOfTheWorldAsWeKnowIt - [[EvilVersusOblivion Hafez probably thought Imhotep ruling the world would be better than it being destroyed]].
* In ''{{Fido}}'', the kid takes his pet zombie to the park to play catch. When the collar controlling its zombie nature malfunctions, it eats an old lady and nearly starts a new ZombieApocalypse. The adults of the movie barely punish him for this.
** At least partially justified in that it's less the adults letting him off with a slap on the wrist, and more them acknowledging that there really wasn't any way Timmy could have predicted that Fido's collar would malfunction, nor could Timmy have controlled Fido, even if he had been able to predict the malfunction. And also, they were acknowledging that while Timmy had screwed up, he'd at least ''tried'' to fix his mistakes. [[spoiler:Notably, by going out and killing the zombified old lady [[CrowningMomentOfAwesome (by decapitating her with a shovel!)]], and then burying her. Granted, she'd already killed someone by then - but he couldn't see the body from where he found her, and it's implied that his knowledge of how long it takes someone to go from 'dead corpse' to 'zombie' was a bit fuzzy. Plus, the truth behind how someone died without Zombcon finding out shortly after was covered up; any open punishment they could have given Timmy would have brought the cover story into question.]]
** The collar also wouldn't have malfunctioned if Mrs. Henderson hadn't been repeatedly hitting Fido with her walker. Really, she brought it on herself.
* In ''[[Franchise/PiratesOfTheCaribbean Pirates of the Caribbean: At World's End]]'', both Barbossa and Beckett are convinced they have what it takes to keep evil on a [[RestrainingBolt leash]] and working for them. First, there's Calypso, a vicious pagan goddess bound in human form by pirate lords, who Barbossa -- a pirate lord himself -- disrespectfully throws in the brig, with the intention of unleashing her on Beckett. Then, there's Davy Jones, Calypso's ex-lover turned heartless [[TheGrimReaper Reaper]], who Beckett has enslaved and intends to have take on the entire Brethren Court for him. This, inevitably, works out for ''neither'' of them. [[spoiler: Well, it ''kinda'' worked for Barbossa. Calypso was angry at him, but this anger was dwarfed by her anger at Jones, and the following storm she created gave the pirates a much needed advantage.]]
* ''TheLibrarian: Curse of the Judas Chalice'' - A group of former KGB agents, wishing to restore the Soviet Union, try to resurrect Vlad Dracula in order to create an army of invincible undead soldiers. They hope to control the infamous vampire by using the Judas Chalice, but it's revealed that the handicapped vampire-obsessed professor they brought with them was in fact a disguised Dracula, who proceeds to feast on the men and turn them into his vampiric minions.
* In ''Film/FreddyVsJason'', Freddy provokes Jason into rising up and attacking the teens of Springwood, in order to stir up a fresh generation's fear and give himself the power that'll let Krueger resume killing also. It works, but the two killers wind up sparring over a dwindling supply of victims rather than rampaging freely.
* Dr. Flemming in ''Film/TheLostSkeletonOfCadavra'' becomes the titular skeleton's bitch after resurrecting him.
* Dr. Cocteau in ''Film/DemolitionMan'' brings convicted criminal Simon Phoenix out of [[HumanPopsicle cryogenic imprisonment]] and gives him all sorts of CrazyAwesome weapons and combat training so he will kill rebel leader Edgar Friendly. Since Phoenix is already an AxCrazy terrorist and mass murderer, this ends badly for Dr. Cocteau.
* In the film version of ''Film/TheWave'', a teacher [[PuttingOnTheReich starts a youth movement]] to make his [[EnforcedMethodActing lessons about autocracies more immersive]]. While the students initially [[JustFollowingOrders play along]] just to humor him, the Wave soon [[CycleOfRevenge spreads beyond his control]]. [[HeelRealization Realizing]] that [[BecomingTheMask he also got into his leader role a bit too much]], he summons the class together to call the whole thing off and [[ShamingTheMob show what they have become]]. [[PsychoSupporter The class outcast]] refuses to believe it and whips out a loaded gun.
* In ''Film/TheDarkKnight'': The mob finally turns to SelfDemonstrating/TheJoker to take down their ever-growing nemesis Franchise/{{Batman}}. [[ForTheEvulz However, they don't fully]] [[ChaoticEvil understand what drives the Joker...]]
** In ''Film/TheDarkKnightRises'', Bane is hired by Daggett to commit a robbery on the Stock Exchange and bankrupt Bruce Wayne. But Bane happens to be a DragonWithAnAgenda, [[spoiler:and breaks Daggett's neck later on]].
** And in ''Film/BatmanBegins'', Falcone works with Crane and Ra's al Ghul for the drugs they smuggle, unbeknownst that the latter two are actually aiming toward higher, more destructive goals. In addition, Crane thinks Ra's is holding the city ransom, not planning to destroy it without prompting as the case really is.
* In ''[[Film/{{Dracula 2000}} Dracula II: Ascension]]'', a group of idiots (to call them scientists would be charitable, at best) steal Dracula's coffin, hoping to replicate his immortality. Dracula is weak, but very much alive. It's demonstrated, for all to see, that his immortality is magic (holy water burns an infected tissue sample). One character deliberately infects himself, another infects someone else to save him (she, at least, was already infected and had yet to turn).
* In ''Film/JudgeDredd'', Justice Griffin tries to use Rico to instill chaos and thereby reopen the Janus project, intending to clone an army of Judges to enforce order in the city. He doesn't seem to realize until too late (despite the mountain of evidence) that he has literally no way to control Rico, and gets himself ripped apart by a robot for his trouble.
* The plot of ''Film/StarTrekIntoDarkness'' is kicked off by the fact that [[spoiler:Admiral Marcus]] tried to use a man named John Harrison to make weapons for Starfleet. So, what's the problem here?[[spoiler:John Harrison is just a pseudonym. He's really the revived [[{{Transhuman}} Khan]] [[EvilOverlord Noonien]] [[MagnificentBastard Singh]].]] This ends just as well as you'd expect.
* Jerry Lundergard in ''Film/{{Fargo}}'' thinks that he can hire a couple of out-of-town hoodlums to kidnap his wife, extort the ransom from his father-in-law, and have her returned safe and sound. He is tragically wrong.
* Almost all of the ''Franchise/{{Alien}}'' franchise is perpetuated by [[MegaCorp Weyland-Yutani's]] misguided belief that they can contain a Xenomorph and sell it as a weapon. They never do, and lots of people always die as a result. In ''Film/AlienResurrection'' the military tries to weaponize the Xenomorphs too, and the personnel on the same ship as the aliens pay for it with their lives. In the ''Alien Versus Predator'' films, the Predators deliberately seeded worlds with Xenomorphs to provide them with sport. In both films this backfires on the Predators when the Xenomorphs start hunting ''them''.
* Delacourt from ''Film/{{Elysium}}'' thinks she can keep [[PsychoForHire Agent Kruger]] on a leash. When he screws up, she starts chastising him for his recklessness. [[spoiler:This bites her in the ass. [[TheStarscream Big time]].]]
* In ''Film/XMenDaysOfFuturePast'', Wolverine and Professor X free Magneto from his metal-free prison to get him to stop Mystique. Of course, he develops his own agenda...
* ''Film/DeathWarrant'': The prison officials, on the orders of their mastermind, bring the AxCrazy killer the Sandman to their prison to kill the undercover cop Burke. The Sandman uses the opportunity to release all the prisoners and start a riot for his own amusement.
* ''Film/TransformersAgeOfExtinction'' reveals that humans have been using parts of Decepticons (including ''Megatron'') [[spoiler:to build their own Transformers.]] Guess what happens. No go on, guess.
[[/folder]]

[[folder:Jokes]]
* "Evil is not a toy! It is a highly-collectible deluxe action figure."
[[/folder]]

[[folder:Literature]]
* At the climax of Creator/CSLewis's ''Literature/TheLastBattle'', [[spoiler:Rishda Tarkaan summons the evil god Tash into Narnia. (Oddly enough, he does this unintentionally: he doesn't even believe in Tash, but to support the imposter-Aslan, he claimed that Aslan and Tash are one and the same. Tash hears and decides to pay a visit.) The evil spirit immediately turns on its summoner; fortunately, Aslan (the real one) intervenes before the scene can get any uglier.]]
* Something similar to the above happens in ''[[Literature/TheSpaceTrilogy Perelandra]].'' Weston is convinced that God and Satan are merely different aspects of some all-powerful spiritual Force - one which has been teaching him some interesting things. In the midst of a particularly pompous speech, he calls the force into himself, whereupon his will is immediately [[DemonicPossession subsumed by demons]]. His last words as himself are utterly terrified.
* In the novel ''Discworld/GuardsGuards!'' [[spoiler:Lupine Wonse, the Patrician's EvilChancellor]], summons an actual dragon for a carefully groomed hero to 'slay' so the hero can be installed as king, with himself as the brains behind the throne. He still got the position of being the aide of the king ... when the dragon roasted the faux hero and took the crown itself.
** Also referenced in ''Discworld/{{Eric}}'':
--->Any wizard bright enough to survive for five minutes was also bright enough to realise that if there was any power in demonology, then it lay with the demons. Using it for your own purposes would be like trying to beat mice to death with a rattlesnake.
** Likewise, the wannabe witch girls in ''Discworld/LordsAndLadies'' fooled around with [[TheFairFolk elves]], despite the old wives' warnings. Disaster ensued, because elves are Not Nice.
** An interesting twist in ''Discworld/WitchesAbroad'': Lilith's not-a-toy evil turned on her in the form of [[spoiler:her own reflection]]. Definitely KarmicDeath.
* In Creator/GlenCook's ''Literature/BlackCompany'' novels, the Lady was originally [[spoiler:bound by the White Rose]] along with her husband, the Dominator, and their henchmen: the Ten Who Were Taken ([[AGoodNameForARockBand nice name for a metal band, eh?]]). The Lady, the Dominator, and the Taken were also SealedEvilInACan, and had been released [[spoiler:by a wizard named Bomanz who wanted to use the Lady's power]].
* In TerryBrooks' ''[[MagicKingdomOfLandover The Tangle Box]]'', Horris Kew and Biggar release the Gorse from its prison, and it enslaves them with the intent to send them down the Box when they are no longer useful. In the end, it is Horris who [[spoiler:[[HeelFaceTurn saves the King]].]]
* In Robert Weinberg's ''A Calculated Magic'', the Big Bad is Nergal, described as the Babylonian god of disease and decay, who was summoned into the present by the character we meet as his [[TheDragon Dragon]], who had been trying to summon a demon. Nergal's first reaction was to grip the Dragon's wrist, leaving a set of fingerprint-like spots of pure disease potential, and warns that if the Dragon ever betrays him, that potential will become full-blown...
* [[Creator/HPLovecraft "Do not call up that which you cannot put down"]] was the advice given to a necromancer from "The Case of Charles Dexter Ward." He didn't listen. More to the point, [[spoiler: the title character's resurrection of said necromantic ancestor resulted in his own imprisonment and murder while the ancestor took over his life.]]
** Also known as "Never summon anything bigger than your head". But size can be misleading.
* In TadWilliams' ''Literature/MemorySorrowAndThorn'' trilogy, evil priest [[TheDragon Pryrates]] casts a massive spell to bring the undead [[SealedEvilInACan Storm King]] back into the world, with the promise that he would be "first among men". He is, indeed, the first... [[spoiler:to be killed]]. It doesn't help that he tries to pull a [[TheStarscream Starscream]] on the Storm King first.
* As big as the ''Franchise/StarWarsExpandedUniverse'' is, you ''know'' this trope had to come up somewhere. [[TheThrawnTrilogy Grand Admiral Thrawn]] went and fetched the insane [[spoiler: clone; but [[OutboundFlight his original]] was just as bad]] Jedi Master Joruus C'baoth off the low-tech world he had been stuck on and ruling in order to get C'baoth to use his Battle Meditation and make Thrawn's forces that much more effective. In return, C'baoth wanted Force-Sensitives, specifically Leia's as-yet-unborn kids. C'baoth had delusions of grandeur, and poor Pellaeon kept telling his boss that having any plans involving someone so unstable was a [[CommanderContrarian very bad idea]]. Thrawn did have plans set up for the inevitable betrayal (up to and including growing a new clone as a replacement), at least, but that point where C'baoth [[spoiler: took control of ''a Star Destroyer'']] was... unnerving.
** [[VideoGame/DarkForcesSaga Jerec]], in ''Literature/GalaxyOfFear'', did not release Spore himself, but when it was semicontained and likely to spread only slowly he decided to strike a deal. He gave it his ship and crew in exchange for it saying that it would obey him - just ''saying'', not even like Thrawn where there was some psychology and safeguards involved. Jerec himself could keep clear of it thanks to TheForce.
* In the ''Literature/OldKingdom'' books:
** The villain of ''Literature/{{Sabriel}}'', Kerrigor, is released from his imprisonment beyond the fifth gate of death by some nameless necromancer who [[EvilGloating "Did not realize it would be in the nature of an exchange"]].
** In ''Lirael''/''Abhorsen'', it was inevitable that some upstart necromancer was going to try to tap into the power of the Lightning Trap. [[spoiler:Anyone who actually managed it got recruited by the Destroyer to help bust him out of his [[SealedEvilInACan can]]. Chlorr just ended up as another minion.]]
* In the ''TabletopGame/{{Warhammer 40000}} Literature/BloodAngels'' short story ''Blood Debt'', [[spoiler: Ramius Stele]] tries to summon a daemon for study, but makes a mistake and the daemon gets free. Things go to hell ''very'' quickly.
* In ''Literature/DarkLordOfDerkholm'', Derk is required to summon a demon (and a God) as part of an [[TheToughGuideToFantasyland elaborate play-adventure to entertain tourists from our world.]] It's not that he doesn't realize it's dangerous, but he's left with no other choice, and he hopes to get a demon small enough that he can control it. [[FromBadToWorse He doesn't.]]
-->'''Derk:''' Why me?
-->'''Tripos:''' ''Because you are more easily put aside than other wizards, of course.''
** Although as it turned out, [[spoiler:Tripos, the Demon King he summoned, was more interested in recovering his enslaved mate from the BigBad than wreaking havoc in the world. Tripos actually ends up being quite helpful and they couldn't have freed the world from Chesney]] if Derk had not summoned him.
* [[TheBully Draco Malfoy]] learns this the hard way in ''Literature/HarryPotterAndTheHalfBloodPrince'' when he replaces his incarcerated father as a Death Eater, but soon finds himself in way over his head when the BigBad orders him to perform an almost impossible task ([[spoiler:assassinate Dumbledore]]) under penalty of his entire family being killed.
** In the same book, Harry himself learns mysterious pseudonyms are not toys either, no matter how helpful they've been in the past. He tries casting "Sectumsempra" on Malfoy, without knowing what it does, and is horrified to find out it [[spoiler:vivisects the target]].
** In the next book, Harry discovers that [[spoiler:Regulus Black, Sirius' Death Eater younger brother, also learned that EvilIsNotAToy, much like Draco. Regulus [[RedemptionEqualsDeath died betraying the Voldemort]]]].
* In the sequel series to ''TheElenium'', ''The Tamuli'', GodOfEvil Cyrgon decides to summon Klael, a being of infinite power and malevolence, capable of crushing Gods like ants and eating {{Eldritch Abomination}}s for breakfast, and tries to control said being and make it his minion. [[WhatAnIdiot That's just asking for trouble.]] [[spoiler:It didn't end well for Cyrgon, predictably enough.]]
* In the [[Literature/TheBible Biblical]] book of ''Genesis'', chapter 3, God creates a Tree of the Knowledge of Good and Evil, places it in the garden with His creations, and commands the man and woman not to eat any of the fruit from it lest they die.
** Debatable. The fruit was ''knowledge,'' not evil itself. Tasting it had [[LateArrivalSpoiler fairly drastic consequences]].
* In Creator/CharlesStross' ''[[TheLaundrySeries The Atrocity Archives]]'' [[ThoseWackyNazis Nazis]] from an AlternateUniverse have summoned an EldritchAbomination to help them defeat the Allies, win the Second World War, [[DefaceOfTheMoon carve Hitler's face into the Moon]] and generally help them rule the world and lord it all over all creation. Unfortunately, none of them considered the possibility that the EldritchAbomination might decide that it was time to eat ''them'' after finishing off everything else. [[spoiler: End result: the Nazis end up as dead as everyone else and that universe faces final entropic heat death several tens of billions of years early.]]
** In ''The Fuller Memorandum'', later in the series, the main character paraphrases the Lovecraft quote from above [[spoiler:when some amateur cultists try to use him as the host for a summoned EldritchAbomination - and screw it up very badly.]]
** In ''The Jennifer Morgue'' [[BigBad Billington]] intends to fish an ancient continent-crushing war machine created by one of elder races from oceanic depths and repair it [[spoiler: because its controlling intelligence [[MindControl mind screwed him into obedience]] when he tried to contact it.]]
* One of the RobinJarvis books has a powerful warlock releasing a giant serpent from its magical sleep, believing that he can use his magic to control it. [[AvertedTrope And he's right.]] When it awakens its will is weak enough that he takes control of it. Then he gets distracted. By the time he can pay attention again its properly awake, and [[DoubleSubversion obliterates him.]]
* In the non-canon S.D. Perry Resident Evil novel Underworld, an anti-Umbrella command team get trapped in an Umbrella Weapons testing lab (which lacks a self-destruct.) When they finally escape, they discover a B.O.W. of extreme power frozen in cryostorage, they wake it up so that it can wipe out the facility for them. [[spoiler: Averted. It works.]]
* Nakajima of ''Literature/DigitalDevilStory'' learns this lesson very painfully after he summons the demon Loki to kill two of his classmates. After biding his time, Loki turns on Nakajima, and almost succeeds in killing him.
* In ''The Shattered World'', TheLeader of the Circle plots to release the spirit of the Necromancer from its tomb, convinced that the arch-sorcerer who'd shattered the planet centuries ago could be forced to put it back together. The novel's protagonists are GenreSavvy enough to see this trope in the making, and rush to stop this scheme. [[spoiler: The truth is a inversion of expectations. The revived ghost of the Necromancer lacks the power to reassemble the world, and turns out not to be evil after all; rather, he's the reason why anyone survived the EarthShatteringKaboom in the first place.]]
* In Creator/RobertEHoward's Franchise/ConanTheBarbarian story "Literature/TheGodInTheBowl," Kallian opened a sealed bowl, intending to steal any valuables and claim burglary. He's found dead due to [[spoiler:releasing what is apparently a friggin' naga from its prison]].
* Anyone who would attempt to use The One Ring against ''Literature/TheLordOfTheRings'' would learn very harshly that the evil corrupting it answered to one master and one master only. Even contemplating using it is risky.\\
\\
Using a palantír is also fraught with danger of a related kind. The palantíri are not inherently evil, being created by the Elves: the trouble is that Sauron has one (specifically the one that was held in Minas Morgul nee Ithil), and anyone who tries to use one of the others is immediately confronted with his evil and overpowering mind. This is the downfall of [[spoiler:Saruman and Denethor]], but [[spoiler:Aragorn]] is able to use his own authority to wrest control of the palantír from Sauron.
* [[spoiler:Randall Flagg]] of ''Franchise/TheDarkTower'' goes through great lengths in order for [[spoiler:Roland's (and the Crimson King's) son Mordred to be born]]. He is killed later for underestimating what he created.
* Victor Sells in ''Literature/TheDresdenFiles'' summons a demon to eat Dresden, [[TooDumbToLive not realizing that anyone who heard him]] [[IKnowYourTrueName name the demon]] could also control it, only to have Dresden release the demon from Sells' control. Sells doesn't live to regret his mistake.
* Merrin Meredith in ''Literature/SeptimusHeap'' fetches the [[ArtifactOfDoom Two-Faced Ring]] and puts it on so that he can use its powers to kill his arch-enemy Septimus Heap. The ring proceeds to almost squashing off his thumb.
* According to Literature/CiaphasCain, when Chaos cultists seek to attract attention of their patron deity, if they are lucky, they just muck about enacting rituals they don't understand, and maybe manage to worm their way into positions of influence, where they can disrupt the proper functioning of the Imperium. If they are not lucky, [[GoneHorriblyRight they succeed]].
* In the backstory of ''Literature/TheSeventhTower'', a woman named Kathilde and her brother wanted to depose Mercur, Emperor of [[TheMagocracy the Chosen]] and take his place. [[spoiler: So they released Sharrakor, SealedEvilInACan and ancient shapeshifting EvilOverlord, to help them out. Predictably, Sharrakor helped them overthrow Mercur, allowing Kathilde to become Empress and her brother her chief advisor, but in the end they were just walking rubberstamps for whatever Sharrakor wanted done]].
* Inverted in Creator/PeterFHamilton's ''[[NightsDawn The Reality Dysfunction]]''. The souls of the dead are returning to possess the living, but they need permission to take control of a live person's body. No problem; they use their reality-warping powers to torture and terrorize the victim until the living soul goes catatonic and lets the dead soul in. Then one of them tries this with Quinn Dexter, who happens to be a Satanic cultist, a psychotic serial killer, and possibly the [[EvilerThanThou most evil person in the galaxy]]. Dexter has no trouble terrorizing ''his own possessor'' into submission, which leaves him in control of both his own body ''and'' his possessor's supernatural powers. The former possessor can only watch helplessly as Dexter becomes a malevolent demigod bent on enslaving humanity and turning the galaxy into a literal Hell.
* Defied in ''Literature/TheLastApprentice''; when confronted with the option of summoning [[{{Satan}} the Fiend]], many of the Witch Clans in Pendle are hostile to the idea precisely because of this trope, being well-aware the Devil will quickly become uncontrollable and cause more problem to them than he will solve. Many witches actually end up [[EnemyMine siding with the protagonists]] after the Devil is summoned anyway because of this.
* In R.A. Salvatore's [[Literature/TheIcewindDaleTrilogy Icewind Dale]] series and subsequent books, several people come to own the ancient and intelligent artifact known as Crenshinibon. While not technically evil, Crenshinibon definitely has it's own agenda, and can manipulate even the most savvy leaders. The artifact is used to make crystalline towers of potent magic, and one owner who was determined to take down his tower ended up creating a second tower and was convinced it was his idea to do so. He is quite shocked when this is pointed out to him.
[[/folder]]

[[folder:Live Action TV]]
* The Master ends up pleading in terror after unsealing the Daemon in the ''Series/DoctorWho'' serial ''The Daemons''.
** This also happened earlier in ''The Tomb of the Cybermen'':
--->'''Klieg:''' Are you listening? Do you understand me? Now that I have released you-- ''ARGGHH... Let me go!'' I set you ''free!'' It was our ''plan!''
--->'''Cybercontroller''': YOU BELONG TO UZZ. [[YouWillBeAssimilated YOU SHALL BE LIKE UZZ]].
** And to Davros, who discovered that he had absolutely no control whatsoever over his Dalek creations. Of course, seeing as how the Doctor had warned him that the Daleks were utterly uncontrollable by anyone not of their race, and how Davros himself had specifically removed all positive emotions (basically, everything besides hatred and self-love) to "ensure they would be the ultimate survivors", this is perhaps more a case of Davros being [[TooDumbtoLive Too Egotistic/Stupid/Psychotic to Live]].
** A double dose in ''The End of Time''. In the first case, the Master is brought back by some kind of cult that wanted Mr. Saxon back; then later, ''he'' makes the same mistake when he [[spoiler: brings back the Time Lords, who want to [[ApocalypseHow end time itself]]]].
** Stated to have happened in the backstory of ''The Greatest Show In The Galaxy'': Kingpin brought the Psychic Circus to Segonax, hoping to summon the powers there. When he tried, they enslaved him and the rest of the circus. In the episode itself, Captain Cook also plans to bargain with the powers; before he can try, he is killed and becomes a revenant under their control.
* ''Series/TheXFiles'': "Did you really think you could summon up the devil and then expect him to behave?"
** For context: a small town Satanic cult has been going a bit light on their worship lately, offering maybe token prayers. Then one of their kids actually summons the Devil. People die.
* In ''Series/PowerRangersJungleFury'', Jarrod (accidentally) releases Dai Shi from his box. Dai Shi promptly possesses Jarrod's body. (The box containing the ancient über-evil opened when it was ''dropped on the ground''. You'd think the Pai Zhua masters would ''lock'' the box or something, but no.)
** Dai Shi keeps releasing more and more overlords, even though in his human shape he's weaker than all of them. The third is finally fed up enough to boot Dai Shi off the throne and take it for himself.
*** It's even worse in the ''Franchise/SuperSentai'' series Jungle Fury was based on, ''Series/JukenSentaiGekiranger''. Dai Shi's sorta counterpart, Rio wants to revive [[SealedEvilInACan the last of the three kenma (the counterparts to the overlords)]], and the two he's already revived tell him that's a bad idea. Think about this, two powerful, super-evil martial arts masters are saying that reviving the last of them is a bad idea.
* Inverted in ''Series/{{Angel}}'' when an already free demon possesses a boy, expecting to use him as a host. The boy turns out to be EvilerThanThou, and the demon finds himself trapped inside.
** Played straight when Gunn attempts to get help from the conduit in "A Hole in the World":
--->'''Conduit''': This is the part where I need to be clear. I am not your friend. I am not your flunky. I am your conduit to the senior partners, and they are tired of your insolence. Oh, yeah. They are not here for your convenience.
** A room of Wolfram and Hart lawyers discover this after reuniting Darla and Drusilla. Once restored to a vampire (which was part of Wolfram and Hart's plan too) Darla turns out to be rather upset about having been brought back human, dying, and forced to ask for help.
* In ''Film/CastADeadlySpell'' where the villain attempts to release the Great Old Ones into the world. Guess [[spoiler: he should have made sure he used a real virgin]].
* In one episode of ''Series/RelicHunter'' a monk tricks Sydney and Nigel into helping him unleash a demon which promptly kills him. The "evil" abbot who tried to prevent it happening turned out to have been the good guy all along.
* The seasonal [[TheChessmaster Chessmaster]] {{Big Bad}}s of ''Series/{{Heroes}}'' regularly fall victim to this in regards to Sylar. They regularly try to recruit him as their [[TheDragon Dragon]], or at least use him as a pawn in their schemes. After going along for a few episodes, he regularly turns around and makes things end ''very'' badly for them. Bennet even lampshades this to Danko: "Just how dumb are you? Who did you think would be left standing the moment Sylar got bored? ''You''?"
* In the last season of ''[[Series/StarTrekDeepSpaceNine DS9]]'', Kai Winn joins with Gul Dukat to free the pa wraiths (Bajoran devils) sealed deep inside the planet. While Dukat was insane and knew ''[[OmnicidalManiac exactly]]'' what he was getting into (hell, they went so far as to empower him), Winn figured she could control both the Pah Wraiths ''and'' Dukat. It ended about as well as you would expect.
** Earlier in the series, Dukat also thought that he could leverage an alliance with [[BigBad the Dominion]] into a position of greater galactic influence for the Cardassian Union. In fairness, he was actually managing fairly well until he got captured by TheFederation; it was under his incompetent, drunken successor that the alliance turned sour.
* Something of an heroic example on ''Series/StarTrekVoyager'', with Janeway's attempt to [[EnemyMine ally with the Borg against Species 8472]]. Thankfully, the crew was GenreSavvy enough to prepare for the Borg's inevitable betrayal.
* A frequent occurrence in ''Series/{{Supernatural}}''. The major example is apparently [[spoiler: Lucifer, who according to Crowley would have destroyed the demons as soon as he no longer needed them.]]
** The witch who summoned the demon Samhain, and was immediately killed after he had a body.
** The idiotic amateur witch who summoned a demon without any kind of protection. It possessed his friend, and offered him "gratitude" instead of the rewards they'd been promised for killing Dean. Then he ''complained'' to it about how hard he'd worked and demanded something more, at which point it killed him.
** VERY MUCH the case for [[spoiler: Castiel at the beginning of Season 7. He sucked in every soul from Purgatory to make himself powerful enough to kill Raphael, declared himself [[AGodAmI the new God]], and lasted a VERY short amount of time (hard to tell exactly in-universe, a few days probably, weeks at most, less than a full episode), and proceeded to get taken over and [[YourHeadAsplode blown up from inside]] by the ancient race of evil that had been sealed in Purgatory.]]
** In "A Little Slice of Kevin", Linda Tran makes the ''horrible'' mistake of trusting a witch to help them fight demons, who immediately betrays them to Crowley. Said witch also makes the mistake of irritating Crowley, the new King of Hell, who responds by vanishing her away somewhere with a flick of his wrist. The episode never clarifies what happened to her, but knowing Crowley, she probably didn't end up somewhere pleasant.
* ''Franchise/UltraSeries''
** Yapool in the ''Series/UltramanMebius'' film, ''Mebius & the Ultra Brothers''. Once Alien Nackle [[spoiler:(Who was part of a group of aliens with the same goal until the rest were killed by Mebius)]] succeeded in releasing him... [[spoiler: Yapool kills him shortly after, having no need for him anymore]].
** Seen again the ''Series/UltraGalaxyMegaMonsterBattle'' film, when Alien Zarab releases the genuinely EVIL Ultra, Ultraman Belial from a space prison and presents him with a weapon that can control 100 monsters. [[spoiler:Belial however kills Zarab shortly after, not wanting to form an alliance with anyone..]]
* ''Series/BuffyTheVampireSlayer'':
** {{Ineffectual Sympathetic Villain}}s Andrew and Jonathon were both prone to fiddling with magic they didn't understand, and unleashing horrible demons into the world. It also didn't help taking up with a genuine psychopath like Warren Mears.
** Spike and Drusilla release the Judge (an ancient demon with the power to incinerate anything with a trace of good in it). He notes that they love each other, which makes them vulnerable to his power, but Spike points out that they're the ones who set it free, and he relents. Whether this state of affairs would have lasted once he regained full strength is unclear.
** Are we supposed to be ''surprised'' that Professor Walsh's human-demon-cyborg stabs her in the back and tries to conquer the world in Season 4?
* In both series of ''{{GARO}}'', the [[spoiler: BigBad]] falls victim to this trope. [[spoiler: Barago is devoured by Messiah after summoning her, and when Sigma Fudou draws power from Ganon's corpse once too often, it triggers a resurrection and he is absorbed.]]
* The meth industry from ''Series/BreakingBad'': Not only has it turned Walt into a sociopath, but his family is now under constant threat of assassination from the cartels.
[[/folder]]

[[folder:Mythology and Religion]]
* The Literature/ArsGoetia includes instructions for making sure that conjured demons ''don't'' show up in EldritchAbomination form, but as [[AFormYouAreComfortableWith something more comprehensible]]...but given the angels described in the book of Ezekiel, this would apply whether or not they had/have a low opinion of humanity. ''However'', there are four exceptions, besides the pomp-and-sycophantry-loving kings (Beleth, Belial, etc.), who get special instructions.
** Phenex: Don't listen to his song; in fact, interrupt it as soon as possible (the text doesn't say ''why'', but there's an implication that the conjuror risks becoming ''Phenex's'' errand boy...at best).
** Valefor: Beware of his temptations to become a robber; he's trying to get you caught and executed.
** Malphas: Yes, he accepts sacrifices happily, but that opens the gate for him to start deceiving you.
** Andras: Follow the binding procedures to the letter, and ignore every temptation he sends at you to do otherwise. Otherwise? He becomes free ''to KILL you '''and every single one of your associates.''''' (No surprise that Andras's powers are causing murder and sowing discord.)
* It is a customary rule in all magic-using religions that you do not conjure up something that is more powerful than you are. If you don't have the power to send it away again, things can get ugly very quickly. Another rule is that magic is held by the rules of karma -- the more evil the curse is, the more likely the spell will backfire. This led religions to discourage the use of evil spells in the first place.
[[/folder]]

[[folder:Radio]]
* BigFinishDoctorWho has this happen to the Meddling Monk. He forms an alliance with the [[OmnicidalManiac Daleks]], thinking they're partners and he can loot the worlds they conquer of their art and become the richest man in creation. He realises his mistake after his companion Tamsin is killed by the Daleks.
[[/folder]]

[[folder:Tabletop Games]]
* ''TabletopGame/DungeonsAndDragons''
** sourcebook "Elder Evils" features several evils sealed in cans. One of these, Pandorym, is [[EldritchAbomination so alien]] it might as well [[BlueAndOrangeMorality add another axis]] to the [[CharacterAlignment alignment diagrams]]. Plus it's angry. Good luck controlling that.
** The [[spoiler:Inevitable]] trying to release Pandorym isn't doing so for its own benefit, though. It just [[spoiler:thinks Pandorym got cheated on a contract and is trying to redress that "wrong."]] The mages who summoned and sealed it in its can get [[WhatAnIdiot bonus stupid points]] when you learn why they did so: to ''blackmail the gods'' into letting them keep their worshipers enslaved without interfering lest they unseal the can. [[RocksFallEveryoneDies Guess how the gods responded to that]].
** For that matter, trying to summon any being from the Lower Planes without casting spells to protect yourself and/or contain the creature in question is guaranteed to end badly. A reckless demon summoning will result in both the enemies and the party being killed, if not ''[[FateWorseThanDeath worse]]''.
* In any RPG based on the CthulhuMythos, one of the villains will be trying to unleash an Elder God not to end the world, but to harness its power. To date, not one of them has ever succeeded.
** ... Except perhaps the Ashcroft Foundation from ''TabletopGame/CthulhuTech'', but given the [[Anime/NeonGenesisEvangelion inspiration for that particular plot point]], we probably just don't know how badly that went yet.
* The backstory for ''Warlord'' villain Avinaar Esmerek looks like one of these, with the heroes finding an ancient temple, obviously recently disturbed, full of prophesies about the awful things that will happen if the being entombed there ever awakens. However, in the final room he is found KilledOffForReal, with a message from the mysterious Avinaar explaining that he unsealed this evil [[BloodKnight just to have a worthy foe]] - and it was too weak, anyway. Cue panic.
* More than a few denizens of ''TabletopGame/{{Warhammer 40000}}'' have made the stunningly catastrophic mistake of treating Chaos or something devised by the Necrons like this.
** In an especially interesting example, excellent fanfic "The Emperor's Finest"[[note]]Not to be confused with the 7th ''Literature/CiaphasCain'' book[[/note]] has, as a plot point, a son of Khorne being summoned and incarnated simply to provide an Ax Crazy daemon prince with a decent fight. The people who try to summon it don't even think about what would happen if it got loose.
* A website referenced a ''TabletopGame/VampireTheMasquerade'' game where evil cultists wanted to revive and enslave Cain, the first vampire, while the [[PlayerCharacter PCs]] were to behold the impending doom, their hands carefully tied. Due to a PC heroically tossing his ''shoe'' to one of the cultists, the ritual was screwed up: Cain was revived but not enslaved, and the rest of the world was safe(ish).
** This is how one Gehenna scenario ends for the Followers of Set. The clan as a whole descends from an insanely powerful vampire they believe to be the god Set from Egyptian mythology, and worship him by tempting others into wickedness. Well, when he finally wakes from his millennia-long slumber, he can't believe his childer would stoop so low as to ''worship'' him, and starts eating them like popcorn.
* In ''TabletopGame/{{GURPS}}'', summoning a demon is temptingly easy to do, even for an inexperienced mage. The probable reason is that demons ''want'' to be summoned -- by people who can't control them.
* In ''TabletopGame/MagicTheGathering'', demon type creatures tend to be powerful for their cost but occasionally have drawbacks that can screw over their controller unless steps are taken to deal with them. Certain demons like the classic [[http://magiccards.info/10e/en/154.html Lord of the Pit]] and [[http://magiccards.info/dka/en/71b.html Archdemon of Greed]] demand regular sacrifices from their summoners and attack them if they are denied. [[http://magiccards.info/isd/en/89.html Bloodgift Demon]] and [[http://magiccards.info/avr/en/106.html Griselbrand]] both have abilities that allow their summoners to trade life for knowledge, and players can easily render themselves vulnerable to an opponent's surprise attack. [[http://magiccards.info/wwk/en/47.html Abyssal Persecutor]] will decimate your opponent's forces but it also keeps him/her from losing and you from winning just to keep the slaughter going for a little longer. [[http://magiccards.info/di/en/129.html Rakdos the Defiler]] is so hard to control that he is just as dangerous to his summoner as he is to the opponent.
* ''TabletopGame/TheDarkEye'' has the story of mage-emperor Fran-Horas who, in order to put down a particularly troublesome revolt against his rule, summoned the [[DemonLordsAndArchDevils Archdemons themselves]] and unleashed them onto the battlefield. They proceeded to wipe out the rebels...then turned on Fran's own forces, plunging the realm into chaos. Fran-Horas himself ended up dragged to hell a few years later, having first had to witness the fall of his empire. And a couple of generations down the line his descendant, the empress Hela-Horas [[TooDumbToLive tried to do the same thing]]. Another century or two of Dark Ages was only averted because the gods themselves decided that enough was enough and made a personal appearance to stop the summoning.
* As a core part of TabletopGame/MummyTheCurse, the Arisen pretty much invariably gather cults around themselves, even whilst lying dormant. More than once, a cult has tried to use its patron as a tool, aided by the fact that rising from the grave in an amnesiac state and being bound to fulfil whatever purpose they were called back for is an inherent part of the Curse. However, what these cultists fail to take into account is that the Arisen are amnesiac, not mindless, and they do ''not'' simply fall down dead again once their purpose is fulfilled; they get to stick around and do whatever they want for a good while first. And their cultists are quite expendable...
[[/folder]]

[[folder:Videogames]]
* When the ''Franchise/SonicTheHedgehog'' series got into more complex plots, Dr. Eggman got into the notable habit of doing this.
** In ''VideoGame/SonicAdventure'', Dr. Eggman releases Chaos and feeds it Chaos Emeralds. It obeys him for a while, but eventually turns on him.
** Also, Eggman releasing [[AntiHero Shadow the Hedgehog]] from his suspended animation in a military base in ''VideoGame/SonicAdventure2''.
** Dark Gaia was released from his can (which was the planet, no less) within the first few seconds of ''VideoGame/SonicUnleashed'', only to break apart and be of no use to anyone, [[MarathonLevel at first.]] Yet when fully restored, Dark Gaia [[spoiler:immediately sends Eggman flying when he tries to control it.]]
** In ''VideoGame/SonicGenerations'', [[spoiler:Eggman averts this, as he takes control of a time-erasing creature by mechanizing it and it never turns on him.]]
** In ''VideoGame/SonicLostWorld'', it actually happens to him early in the game when he attempted to harness the Deadly Six's power. It was caused by [[NiceJobBreakingItHero Sonic's impulsiveness]] causing him into knocking the Deadly Six's RestrainingBolt shell out of Dr. Eggman's hand.
* ''VideoGame/VampireTheMasqueradeBloodlines'' played with this quite epically: [[spoiler:sealed evil is just a good bunch of TNT, but hey, works just as good!]]
* ''VideoGame/TalesOfPhantasia'': Mars [[DoomedHometown burns down the protagonists' town]] just to get one of the keys to unseal Dhaos. The first thing Dhaos does when unsealed is to disintegrate Mars. [[spoiler: Well, that's the second; the first thing is to reveal that he himself had manipulated Mars to unseal him]].
* In an early chapter of ''VideoGame/ShinMegamiTenseiII'', you are sent to track down the scientist Mekata, and find him opening a gate to the Abyss so he can access an unlimited supply of demon servants. He directs the first demon he gets to kill you... and it immediately kills him instead. Turns out he botched the ritual...
* ''VideoGame/ReturnToCastleWolfenstein'': Katarina resurrects Heinrich, who turns her into some sort of weak zombie slave.
** Earlier in the same game, Helga von Bulow is turned into ground meat by the creature she resurrects.
* An odd case of this happens in ''VideoGame/MortalKombatDeception''; BigBad Onaga tricks Shujinko into bringing together the Kamidogu to revive him, then takes them all for himself afterwards in order to fuse all the realms into one. This, in turn, turns out to be another ploy by an even bigger BigBad, the One Being, who is manipulating Onaga into doing so to revive it, with Onaga's ultimate "reward" being non-existence. And, as a backup plan, the One Being also manipulated Onaga's traitorous successor, Shao Kahn, into conquering realms to fuse with Outworld to achieve the same goal. So far only Ermac, Shao Kahn's former enforcer, seems to be aware of his presence.
** The Elder Gods also know about the One Being (they did the sealing, after all), however, they are [[NeglectfulPrecursors idiots]].
* In ''VideoGame/GunstarHeroes'' [[spoiler: The 4 Treasure Gems fry General Gray after completing the BossRush and reveal the real final boss]].
* This is a recurring theme in ''Franchise/KingdomHearts''.
** [[WhiteHairBlackHeart Riku]] gives himself over to the Darkness at the very beginning of the game, thinking it's an easy way off his world and [[JumpedAtTheCall into the adventure he craves]]. It ends up separating him from his [[TrueCompanions friends]], [[DoomedHometown destroying his homeworld]], and apparently devouring the heart of [[TwoGuysAndAGirl the girl he and his best friend like]]. Oh, and it also [[spoiler:denies him a glorious destiny as the wielder of the Keyblade, but he doesn't learn that until later.]] He only blunders worse from there on. Having not yet learned his lesson, he makes a [[DealWithTheDevil deal with Maleficent]] so he can try and find his friends, and he actively dives into the power of darkness to try and find Kairi's missing heart. When that doesn't work, he makes another deal with some figure he can't even ''see'' for more power, which winds up [[DemonicPossession costing him possession of his own body]]. He finally starts saying "No to Drugs," but it takes him the rest of the first game, all of the next, and most of the third to deal with the consequences.
** In addition to all this is Ansem's story [[spoiler:(which is really ''Xenanort's'' story, as it turns out "Ansem" was really someone else ''posing '' as Ansem)]] in trying to get into Kingdom Hearts, where he plunged headfirst into the Darkness and turned himself into a Heartless. But apparently, he actually needs a physical body to open the door to Kingdom Hearts. Oops. When he finally manages to open the door, the [[SealedGoodInACan Light within Kingdom Hearts]] proves to be his undoing. Oops again.
** ''Birth By Sleep'' reveals that Evil ''really'' is not a toy. Use of Darkness be it for good or evil weakens the body's natural Light defenses against other darkness users. Hence trying to fight a stronger darkness user with darkness won't work very well and will just make them hurt you more. Hence Terra who mastered his own power of darkness and swore to wield it against evil and for the sake of his friends (manifested in gameplay by him acquiring a dark Keyblade and an attack called Dark Impulse) uses it against the BigBad and defeats him with it [[spoiler: and then Xenahort unlocks his own heart and sends it into Terra, which Terra whose light defenses are weakened from the use of dark power is unable to resist, causing Xenahort to take control of Terra's body. EvilIsNotAToy or in this case something that can be used without consequence kids!]]
*** While DarkIsNotEvil, Evil is still not a toy, and neither is darkness. It is possible to control the Darkness [[spoiler:(Riku finally managed it in his story in game 2)]] but it is NOT something to take lightly. [[spoiler:There's a reason that King Mickey told Riku that losing the power of darkness was a ''good '' thing, despite all the past talk about it not being evil.]]
*** Vanitas [[spoiler: is Ventus's SuperpoweredEvilSide which was extracted from Ventus's heart and body by [[BigBad Master Xehanort]].]] At the end of ''Birth By Sleep'', [[spoiler: he possesses an unlimited army of [[TheHeartless evil underlings]] and a [[InfinityPlusOneSword nigh omnipotent weapon]] capable of bending reality and plunging the worlds into neverending war.]] This is especially distressing because [[spoiler: 1) he's a [[EvilLaugh mani]][[ForTheEvulz ac]] and 2) earlier in the game he showed no remorse over disobeying [[BigBad Master Xehanort's]] express orders. In all likelihood, he would have just killed his "master" and wreaked havoc all over the universe had Aqua and Ventus not stopped him.]]
* This happens many times in the {{M|assivelyMultiplayerOnlineRolePlayingGame}}MORPG ''VideoGame/CityOfHeroes''. In every single case, it's up to the player characters to clean up the mess.
** Most notably, happens to the ''players'' during the Barracuda Strike Force.
* In ''VideoGame/PaperMarioTheThousandYearDoor'', [[spoiler:the Shadow Queen blows Grodus up after he commands her after freeing her]]. This all happened because [[spoiler:the Shadow Sirens, the Shadow Queen's true servants, had deliberately tricked him into thinking it was possible to command her.]]
** It also parodies this trope. Throughout the game, the player encounters four black treasure chests with a voice inside them, each of which begs the player to open them and set them free. When freed, the beings in the chest laugh evilly, change the background music to sound more evil, and then gloat about how they have tricked the player and will now curse him. In each case, the "curse" is [[CursedWithAwesome actually a new ability]]. [[spoiler:This is actually intentional on the part of the "evil" beings, who were the former heroes who sealed the Shadow Queen.]]
* In ''[[VideoGame/MarioAndLuigiBowsersInsideStory Mario & Luigi: Bowser's Inside Story]]'', Fawful attempts to harness the Dark Star, [[EldritchAbomination a being of]] [[MadeOfEvil raw evil]], to gain ultimate power, but [[spoiler:it overpowers him to become the real final boss.]]
* In ''[[VideoGame/MarioAndLuigiDreamTeam Mario & Luigi: Dream Team]]'' Bowser and Antasma(a being of Nightmare team up.[[spoiler:Antasma learns that Bowser is not a toy(considering Bowser's title of ''Great Demon King'' Antasma really should have seen it coming).]]
* DoubleSubversion in ''[[VideoGame/WildArms1 Wild ARMs]]'' and the ''Alter Code F'' [[VideoGameRemake remake]]. The SealedEvilInACan, Mother, was being awakened by her Demon children. But once she was released, she told them that she was going to destroy the world, which is at odds with her children's desire to rule the world. So these Demons then ''betray'' Mother, helping the heroes to destroy Mother so that it will clear the way for them to rule the world. Mother turns out to be NotQuiteDead; she [[DemonicPossession possesses]] the leader of the Demons, thus fulfilling the trope.
* The arcade game ''VideoGame/HouseOfTheDead'' reaches its climax as the BigBad Doctor Curien unleashes his most powerful creation, Magician Type 0, and commands it to attack the main characters. You can guess what happens to the Doctor.
* Subversion, at the end of the first ''Franchise/ResidentEvil'' game [[MagnificentBastard Albert Wesker]] tries to unleash the most powerful of the Umbrella Corporation's virus born monsters (the Tyrant) on the main characters. He gets a claw to the torso for his trouble but in the later games it turns out he [[ThePlan planned it all along]] and injected himself with a virus which put him in a deathlike state and gave him superhuman abilities.
** Played straight in ''Resident Evil: Outbreak File #2''. In the last level, "End of the Road" a visibly nuts Umbrella researcher releases a Tyrant to destroy the loose hunters, over the objections of the [[OnlySaneMan only competent Umbrella employee in the whole series]]. Guess how it ends.
* In ''VideoGame/ChronoTrigger'' it's a common belief that Magus attempts to awaken Lavos to play with it before being foiled by the heroes. [[spoiler: if given a chance, he explains that he really wanted to summon Lavos to destroy it. Given the fact that unaltered history went on to having the Mystics lose the war due to Magus' disappearance while Lavos' influence temporarily lessened due to the summoning, it would seem he fought Lavos and succeeded in weakening it at the cost of his own life.]]
** Also in ''VideoGame/ChronoTrigger'' we have a highly magical floating city of Zeal, whose ruler tries to harness the power of the world-destroying Lavos. As a result [[spoiler:the queen [[GodSaveUsFromTheQueen goes insane]] and the city comes [[ColonyDrop crashing down]] when Lavos gets angry]].
* In the Creator/LucasArts adventure game ''VideoGame/{{Loom}}'', the head of the Guild of Clerics makes ominous plans to [[TakeOverTheWorld rule the world]] with an ArmyOfTheDead. As soon as he opens a portal to the world of the dead, its ruler Chaos floats through and [[CurbStompBattle kills him in a rather gruesome manner]]. Chaos then proceeds to take over the world by himself.
* Everyone who uses the Emigre Manuscript in ''VideoGame/ShadowHearts'' assumes that, unlike the poor bastards before them, they'll be able to hold it together long enough to bring [[{{Necromantic}} their loved ones]] BackFromTheDead. They usually end up a statistic. [[spoiler:The only time it works properly, it requires a HeroicSacrifice and ''still'' produces an EldritchAbomination]].
* ''Franchise/FireEmblem''; repeatedly. Spoilers ahoy!
** Fire Emblem 7's BigBad Nergal fully devoted himself to the dark arts in order to rescue his wife. Said dark arts consumed his free will.
** Fire Emblem ''Sacred Stones'' [[spoiler:Prince Lyon of Grado tries to use his country's sacred stone to heal his ailing father. Good idea, except he knows the Demon King's soul is imprisoned inside, but he's sure he can control it. Not only does it control him, but it kills his father, resurrects it as a zombie, and promptly declares war against the world. Oh, and it consumes Lyon's soul by the end of the game. Oops.]]
** ''Path of Radiance'' Mad King Ashnard declares war and pisses everyone off so he can generate enough chaos to unlock Lehran's Medallion and free the dark god inside. Luckily you stop him before it happens.
** ''Radiant Dawn'' Averted. [[spoiler: Lehran is still alive and well and he starts another war, hoping to break the medallion. He doesn't want the god trapped inside but if she wakes up, her counterpart will wake up and turn everyone to stone. That's exactly what he wants.]] ''Radiant Dawn'' also retroactively averts ''Path of Radiance'' for this trope: [[spoiler: the "dark god" imprisoned within the medallion is actually not a dark god at all, merely the embodiment of chaos, emotion, and free will. Which means Ashnard was never using evil like a toy to begin with.]]
* In the ''VideoGame/WorldOfWarcraft'' instance of The Arcatraz, the end boss fight consists of a guy releasing monsters to attack the players. In the end he unleashes a big alien/demon/god and gets promptly killed by it.
** Similarly, high-level Warlocks can summon creatures which may break free of their bonds and attack the player themselves, though they rarely succeed in killing them.
** The warlocks of Auchindoun are particularly bad about this, apparently spending their entire time summoning up things they can't control and desperately trying not to get killed by them. One boss has a room full of people keeping it banished so it can't kill them. And the final boss has a bigger room full of people attacking it and being killed as they try to stop it getting out.
** Also, the second boss of Trial of the Crusader is a demon summoned by a Gnome Warlock. He accidentally summons a Eredar Lord, however, who promptly kills him.
** Zigzagged with the troll shaman Jin'do the Hexer, one of those serving the [[GodOfEvil Blood God]] [[NamesToRunAwayFromReallyFast Hakkar the Soulflayer]] in Zul'Gurub. After his defeat Jin'do's spirit is taken to be tormented by the spiteful god, as one might expect. Less expected is that three expansions later Jin'do the ''Godbreaker'' returns to Zul'Gurub and life having enslaved Hakkar. However, his control is still unstable, and if they players manage to break the chains binding Hakkar the god obliterates his treacherous servant immediately.
* ''VideoGame/NeverwinterNights: Hordes of the Underdark'' has a drow queen bind one of the nine lords of Baator. This does not end well. Baator is FireAndBrimstoneHell. Don't mess with the entities living there.
* Averted in ''VideoGame/SoulNomadAndTheWorldEaters'', thanks to proper estimation of the threat involved and planning how to deal with it. Layna manipulates the main character into awakening the OmnicidalManiac Gig who sleeps inside an ArtifactOfDoom, and then shields him/her from the ensuing DemonicPossession. This forces Gig into co-inhabiting the protagonist's body, producing a fused being possessing the power needed to SaveTheWorld. In short, it ''works''.
** ...Except for [[spoiler:in the Demon Path]], in which it turns out that [[spoiler:the protagonist isn't a very nice person and immediately goes on a genocidal rampage with Gig's powers, [[HoistByHisOwnPetard starting with her]]]].
** Played straight in the normal path anyway, in an unrelated incident. Put short, controlling a World Eater is unfathomably stupid. [[spoiler:For the long explanation, King Strauss VIII bought a Crimson Tear with intent to use it to control World Eater Feinne (who is almost completely mindless, so it should tell you how bad it would be to try to control either of the other two). His attempt at fusing with Feinne in an attempt to control her starts with a "hiccup" - Feinne simply blows straight to oblivion ''the back half of the Kingdom of Raide!'' He attempts to continue despite this, and, well... [[MemeticMutation OM NOM NOM]].]]
-->[[spoiler:'''Gig''': If you want to know why they're called World Eaters, well... there you go.]]
* Averted in ''VideoGame/KnightsOfTheOldRepublic''. Darth Revan unearthed an ancient ArtifactOfDoom [[spoiler:known as the Star Forge, which functioned both as a powerful enhancer of dark side power and as a ship production facility]] -- but never thought to use it as the former, which was good, as it had [[TurnedAgainstTheirMasters caused the downfall of its creators when they'd started to use it in that manner]]. His apprentice, who tested things and decided to try it, didn't live long enough to have the long-term bad effects happen to him.
** Tilt your head and squint, and you can see Bastila and the Jedi Council's efforts to use the greatest weapon - turning someone to their cause, hoping to get the locations of the Star Maps - as this trope. [[spoiler: Whether it's averted or not depends on the player.]] The Jedi were wise enough to know that this was a dangerous gamble but they were GenreSavvy enough to send a [[LoveRedeems pretty Light-side woman]] along...
* ''VideoGame/PokemonRanger: Shadows of Almia'': The BigBad unleashes the legendary Dark Pokémon Darkrai, and tries to sic it on the hero after [[TimTaylorTechnology cranking up the energy of his Incredible Machine beyond its limits]] to [[FourIsDeath Level "Dark"]]. Darkrai then goes berserk and [[HoistByHisOwnPetard swallows him and his sycophantic henchman inside a Dark Void]].
** Also, in ''VideoGame/PokemonRubyAndSapphire''/''Emerald'', this is the end result of Team Aqua's/Team Magma's ''spectacularly'' retarded ecoterrorism plot.
* ''VideoGame/ChzoMythos'' has the druid Cabadath, who intends to open a portal to AnotherDimension in order to take control over Chzo, an EldritchAbomination and a god of pain, and have him fight the invading roman forces. He fails miserably, [[FateWorseThanDeath and is subjected to an eternity of horrible torture]]. He is subsequently turned into The Tall Man, a sort of [[TheDragon Dragon]], and is used in a similar fashion by other minor villains.
* ''VideoGame/{{Iji}}'' is a rare case of the ''protagonists'' doing this: after the planet is devastated by an alien invasion, they try [[SummonBiggerFish calling in another group of aliens they heard was opposed to the first]]. Turns out that [[spoiler:the first aliens just wanted somewhere to hide and regroup. The ''other'' ones are out to conquer the universe, one EarthShatteringKaboom at a time]].
* If you play the Dark Side path in ''[[VideoGame/DarkForcesSaga Dark Forces 2: Jedi Knight]]'', Jerec succeeds in his attempt to turn Kyle to the Dark Side...only to have Kyle immediately try to kill him. Now that he's evil, Kyle doesn't have to hold back or worry about innocent bystanders getting in the way. Though Jerec survives that particular attack with no trouble, and ultimately Kyle kills Jerec no matter which path you choose.
** It's standart trope in ''Franchise/StarWars'' games. You get a "WeCanRuleTogether" proposal and either decline it or reply "ICanRuleAlone".
** In ''[[VideoGame/DarkForcesSaga Jedi Academy]]'', one mission starts with the bad guys releasing an [[TheJuggernaut unstoppable]] mutated rancor into a spaceport with the intention of looting the city after its passing. It immediately starts killing and eating them (while they for some reason try to fight back instead of stepping aside and letting it do its thing).
* This is the eventual fate of [[spoiler:Chancellor Cole]] in ''VideoGame/TheLegendOfZeldaSpiritTracks''. During the final battle, [[spoiler:he and Malladus (the Demon King whom he had earlier released from his seal) seem to make a good enough team together, but toward the end, once their getaway train has been wrecked and the Demon King is forcibly removed from Zelda's body, Cole makes the grave mistake of ''ordering'' Malladus to get back into her. Presumably fed up with all the nonsense that had occurred up to that point, Malladus simply ''eats'' him, [[DemonicPossession hijacking his body]] to transform into his [[OneWingedAngel final form]]]].
** This also happens to Byrne, TheDragon for the Chancellor Cole. He demands Malladus give him power, and it should be no surprise when he gets sent flying across the room and knocked out. It also leads to his HeelFaceTurn. Cole even mocks this.
** It also happens in ''VideoGame/TheLegendOfZeldaALinkBetweenWorlds''. Hilda thinks she can use Yuga to revive Ganon and rebuild Lorule with the power of the Triforce... [[spoiler: She's very wrong. Yuga had his own plans for world conquest, and turns on her with the help of Ganon's power]].
* In ''VideoGame/DragonQuestVI'', about halfway through the game, a kingdom summons a powerful demon named Nokturnus in the hopes of destroying BigBad Mortamor. The demon immediately obliterates the kingdom.
** However, in an interesting twist, if you've done a lot of grinding (and I mean a ''lot'' of grinding), you can defeat the demon, who is then so impressed by your strength that he actually ''does'' fly over to Mortamor's place and curb stomps him for you. Needless to say, if you're strong enough to beat Nokturnus you're strong enough to curbstomp Mortamor yourself, but it's still fun to watch.
* In ''VideoGame/FinalFantasyV'' the Bigbad [[TinTyrant Exdeath]] has the ultimate goal of gaining power over this thing called "the void" and take over the world with it. He laughs at people saying the Void couldn't be controlled and is seemingly using it without any problems, but after you beat in the game's final dungeon, he loses control of it and possess him, which for you is also bad.
* ''VideoGame/ShadowOfTheColossus''- At the beginning, Dormin clearly tells Wander that resurrecting Mono will have unpleasant consequences.
* ''VideoGame/BlazBlue'': During his training, Jubei constantly reminds Ragna that the power of [[MacGuffin the Azure Grimoire]] is not truly his power, and that it will never truly be under his control. [[spoiler: As the creator of the Azure Grimoire(s), ''both'' of them,]] [[BigBad Yuuki Terumi]] seems to think he can easily control the power of the Azure. [[LaserGuidedKarma It backfires]] when [[spoiler: Lambda performs her HeroicSacrifice, enabling Ragna to overwhelm Terumi's Grimoire and halt Mu-12's rampage. This was all according to Terumi's plan and he takes advantage of this situation [[spoiler: and uploads a virus that freezes Takamagahara, the reality warping supercomputer that held his leash]]. Granted, this did come at the cost of [[spoiler: his monopoly over the Azure's power and Mu-12]].
** This trope also applies to [[spoiler:Takamagahara, who paroled Terumi from his Hakumen-enforced imprisonment in the Boundary as a pawn for their plan to destroy the Master Unit. He proceeds to infect them during a blind spot in their omniscience]].
** Lotte Carmine so believed that if he could harness the knowledge of [[EldritchLocation the Boundary]], he could come up with something beneficial to humanity, even if it costs the lives of many people. Even his MadScientist mentor Kokonoe did not approve, and the result of that is that he gains nothing, and the Boundary corrupts him into [[EldritchAbomination Arakune]]. Even worse, his girlfriend Litchi decided to ''dabble'' on that as well to save him, and on the sign of first symptoms, when Kokonoe refuses to even help her, she decided to [[spoiler:dabble with another Evil: NOL and Hazama, aka Yuuki Terumi. It's still unclear which one is EvilerThanThou in this case: Boundary corruption or NOL/Hazama]]. Lotte at least managed to learn his lesson [[spoiler:and managed to pull himself together enough to warn Litchi to stay away from him and get Kokonoe to help her with her own Boundary corruption. Although even Litchi herself realizes that she already dug too far, and just letting it be as everyone else told her to will not make her problem go away]]. It's complicated.
** One of the Six Heroes, Nine, also fell to this. She just banished Terumi after the murder of her would-be brother in law Tomonori[[spoiler:, who tried and failed to kill Kazuma Kvar before Terumi could merge with him]]. When the [[{{Orochi}} Black Beast]] arrived, she decided to free Terumi and enslave him with Mind Eater, thinking she could control him well. That backfired, Terumi killed her [[spoiler:and in irony's sake, she would get turned into Phantom, practically Terumi's slave]].
*** To be fair to Nine, [[spoiler:Terumi could not break the geas on his own, and he needed to con her close friend and his (body's) love interest, Trinity Glassfield, into having it lifted. Once it was, he shanked them both and tossed them into the nearest cauldron.]]
** [[spoiler:''Chronophantasma'' reveals that, ironically, both Yuuki Terumi and Relius Clover are on the receiving end of this trope. Both of them were so confident in their ability to carry out their plans that they left control of Takamagahara to Imperator Librarius, with the intent of using them - and her - to draw out the Master Unit and have her expire in the process. Given they both abducted her from Celica's church explicitly for use as a vessel in ''Wheel of Fortune'', they had no intention of keeping her longer than they desired. By the end, she reveals her true identity as Izanami (and Phantom's REAL boss instead of Terumi as he thought above) and leaves them to their fates whilst she seeks to destroy the Master Unit or eliminate those with the power to challenge her world of death. Long story short, [[VideoGame/DmCDevilMayCry you don't fuck with a god]].]]
* [[TheDragon Saren Arterius]] in ''Franchise/MassEffect'' finds [[SapientShip Sove]][[BigBad reign's]] mind-control powers quite useful in acquiring minions, but has the foresight to set up a research lab to find out how it it really works. [[spoiler:He's ProperlyParanoid, because Sovereign is also influencing him.]]
** Researching the Rachni, the Krogans, the Geth or AI in general has a tendency to backfire spectacularly, [[spoiler:even if none of them are evil per se.]]
** In ''VideoGame/MassEffect3'', [[spoiler:The Illusive Man attempts to take control of the Reapers. But as much of a MagnificentBastard as he is, he was still out of his league there and ends up indoctrinated.]]
** [[spoiler:Javik claims that something very similar happened during their Reaper Cycle. A fringe group tried to take control of the Reapers, became indoctrinated for their efforts, and screwed over everybody else. [[SchmuckBait There's a reason the Reapers leave tech all over the galaxy]].]]
** [[spoiler: According to Vendetta, there is evidence of certain patterns manifest and repeat in every previous Cycle of extinction, suggesting that indoctrinated groups rise up to try this plan - only to fail miserably and hamper everyone else's efforts - [[HistoryRepeats Every. Single. Time!]]]]
* In ''VideoGame/DragonAgeII'' Merrill knows making a deal with a Pride demon -- the most powerful and cunning breed of demon -- to restore the Eluvian is dangerous, but thinks the risk is worth it. Nearly everyone around her disagrees, including her mentor Marethari, Anders, Fenris, and Rival!Hawke. In the end [[spoiler:her detractors are proven right. The Pride demon was going to use the restored Eluvian to enter the real world and Merrill would have been its first victim. Only Marethari's sacrifice prevented this outcome.]] Anders is also guilty of this. He believed that becoming Justice's host wouldn't be too bad, since Justice was a "good" spirit. Merrill gently tells him that there is no such thing as a "good" Fade spirit -- ''all'' spirits are dangerous.
** And in ''VideoGame/DragonAgeOriginsAwakening'', the expansion to the original game, it is revealed that (weapons-grade spoiler) [[spoiler: the Architect, a darkspawn born with free will, accidentally caused the Fifth Blight when he awakened the Old God Urthemiel and tried to turn him into a free-willed darkspawn like himself, with the intention that this could '''prevent''' future Blights. Instead, he spread the darkspawn taint to Urthemiel and turned him into the Archdemon, causing the very Blight he was trying to prevent. Oops!]]
* ''Franchise/ShinMegamiTensei'' has a very simple law of magic-you can attain ''ludicrous'' amounts of power by taking demonic ([[GodAndSatanAreBothJerks or angelic]]) essence into your body. Your mind, either because of the power, or because of how you abuse it, is going to degrade to the point you end up doing incredibly stupid stuff and killing yourself through sheer idiocy. Or being enslaved to a divine being for all eternity. Your choice, folks.
* ''VideoGame/ArcTheLad'' gets a moment of this when the King of a country that has been manipulated by demons willingly sets free the BigBad and gets as far to say 'My first act shall be...' before he is vaporized for 'Serving his purpose'.
* ''VideoGame/DeadRising2'': Any MegaCorp that thinks using zombies to further some goal is a good idea is asking for trouble, but the folks behind [[ShowWithinAShow Terror Is Reality]] deserve mention for keeping an army of zombies around for a gameshow. Naturally they escape and destroy Fortune City.
* The [[MakeAWish Wish]] spell in ''VideoGame/{{Dominions}}'' ''can'' be used to summon any unit you can think of. But if you summon a [[EldritchAbomination Doom Horror]], it only has a 50% chance of being controllable instead of hostile, and the Horror that responds to your call may not be the one you asked for.
* The entire Aurum arc in ''VideoGame/KidIcarusUprising'' was revealed to be part of [[spoiler:Pyrrhon]]'s plan to [[spoiler:take control of the aforementioned [[Franchise/StarTrek Borg]] expies.]] It goes as well as you'd think. Notable in that [[spoiler:Pyrrhon himself]] is a [[PhysicalGod god]], albeit a minor and not very respected one.
* ''VideoGame/QuestForGloryIV'' brings us Katrina, [[spoiler: a deeply lonely and incredibly powerful vampire and sorceress who desires to unleash a Cthulhuesque EldritchAbomination called the Dark One, and plunge the world into permanent darkness so vampires can walk abroad at all hours of the day without fear of the sun. It's never really seen what would happen if she had succeeded, as Katrina sacrifices herself to protect the Hero from [[TheDragon Ad Avis]] while the Hero subsequently banishes the Dark One back to where it came from. However based on the NonstandardGameOver message if the Dark One is released, it probably would not have ended well for ''anyone'']].
* ''VideoGame/{{Homeworld}}: Cataclysm'' has TheRemnant of the once-powerful [[TheEmpire Taiidani Empire]] team up with an extra-galactic [[TheVirus viral]] entity called [[NamesToRunAwayFromReallyFast the Beast]]. Once the Imperials repair the ''Nagarrok'', the Beast has no more use for the Imperials and starts to devour their ships, adding them to its fleet. Realizing they've been duped, the Imperials flee, leaving the Beast's superweapon defenseless.
* In ''VideoGame/YuGiOhTheDuelistsOfTheRoses'', Seto orchestrates the events of the entire game to resurrect a Card Guardian who had struck a deal with his ancestors. Seto expects that the Guardian will help him rule the world. Predictably, the Guardian is NOT HAPPY. And then you find out that Seto has been awakening Card Guardians for years looking for the right one. Dude clearly doesn't learn from his mistakes.
* In ''VideoGame/{{StarCraft|I}}'', both the [[CorruptedGovernment Confederacy]] and [[TheEmperor Arcturus Mengsk]] after them both believed the [[HordeOfAlienLocusts Zerg]] were just animals and that it was a good idea to use them as a weapon by putting Psy Emulators that would attract them on any planet they wanted. [[ItCanThink They were wrong]]. And they learnt it the hard way.
** This is actually invoked in ''VideoGame/{{StarCraft II}}''. After curing [[FallenHero Sarah Kerrigan]] from her ViralTransformation in [[VideoGame/StarCraftIIWingsOfLiberty Wings of Liberty]], Valerian Mengsk finds out she still has some Zerg mutagen inside her, and asks her to control Zerg cobayes to see how much of her powers remain. Kerrigan quickly grows an army of them, wrecks the entire lab, and then takes them back to their cages to show to Valerian how dangerous it is to think you can control such a chaotic species. Fortunately, Valerian is smart enough to get the message.
** [=UED=] admiral Gerard Dugalle acknowledged this in his [[spoiler:final message]] to his wife. "The creatures we were sent here to tame are untameable" indeed.
** Invoked in ''[[VideoGame/StarcraftIIHeartOfTheSwarm Heart of the Swarm]]'': [[spoiler:Mengsk has been creating a Hybrid army to use against the Protoss and Zerg. He thinks he can control them; Stukov is less optimistic.]]
* There's only one ''VideoGame/MegaManClassic'' game where Dr. Wily is ''a'' final boss, but fails to be ''the'' final one: ''VideoGame/MegaManV'' for Game Boy, in which he pulls his usual [[HijackedByGanon hijacking]] routine only to fall victim to this trope. The ancient robot Sunstar has no interest in following Wily's orders (though he's happy to kick Mega Man around anyway).
* Implied from a torn-up note in ''[[VideoGame/DarkFall]] The Journal''.
* In chapter 5 of ''BaldursGate 2'', a drow priestess summons a powerful demon lord to aid them with their planned assault on the surface elves. The protagonist has the option of tricking the priestess into offering the wrong sacrifice, upon which the demon promptly obliterates her. Her daughter then attempts the same, and again the protagonist can tamper with the sacrifice and have the demon kill her as well.
* Summoning demons or Sleeping Ones in ''ConquestOfElysium2'' is far from risk free. Anything can rebel against you if you're not generous enough with the sacrifice, and even massive sacrifices don't completely negate the risk. Considering that some beings can wipe out armies on their own, you better be prepared.
* In ''VideoGame/{{Sacrifice}}'', part of Eldred's backstory is that he summoned a powerful demon called Marduk to destroy the armies of his enemies. Marduk, revealing himself as an OmnicidalManiac, fulfilled the exact letter of the bargain by destroying Eldred's entire world, and is later shown to have followed Eldred across the planes to the world the game is set in to 'settle things'.
* In ''VideoGame/GrandTheftAutoV'' the ''protagonists'' themselves are this: [[IJustWantToBeSpecial a gang banger wanting to become a more professional criminal]], a [[RetiredMonster retired bank robber who had been one of the most wanted men in America]] [[AxCrazy and an unhinged maniac]]. And corrupt government agent and an extremely sleazy billionaire use them for their purpose, and then make[[SmugSnake every attempt possible to screw them.]] [[spoiler: Depending on player's choice, the protagonists can kill them when the billionaire and the agent attempt to use of them to kill the other.]]
[[/folder]]

[[folder:Web Comics]]
* In ''Webcomic/EightBitTheater'', Black Mage tries to control unstoppable forces of evil whenever possible, usually causing a double-subversion or [[RuleOfFunny whatever might be hilarious]]. He takes control of an accidentally summoned EldritchAbomination--pretty successfully, since it's almost as sociopathic as he is--until one of his "friends" accidentally kills it. He tries to become the ruler of Hell, and he does, but then someone brings him back to life. Played with most destructively in the end: [[spoiler:Sarda absorbs Black Mage's [[BuffySpeak super-evilness]], which seems to work fine, until he explodes and turns into [[BigBad Chaos]]]]. [[RunningGag And Black Mage immediately tries to control him.]]
* ''Webcomic/AngelMoxie'', Tristan helps release Vashi on the promise that when Vashi's boss Yzin takes over the world Tris can rule France. Vashi lied. Tris got mad [[spoiler:and punched Vashi so hard she landed in China, before [[HeelFaceTurn joining the good guys]].]]
* ''Webcomic/GirlGenius''. [[spoiler:Zola]] releases and tries to help The Other. One GilliganCut later and [[spoiler:she's hog-tied and an unwilling test subject for another fine display of Mad Science.]]
* ''Webcomic/AModestDestiny'': The villain Gilbert raises Deo-Deo from the dead, in exchange for immortality. [[http://www.squidi.net/comic/amd/view.php?series=amd&ep=1&id=342 However]]...
* [[spoiler:Vaarsuvius]] in ''Webcomic/TheOrderOfTheStick'' makes a DealWithTheDevil and actually does get huge amounts of power [[spoiler:temporarily]]. Having accomplished a couple hits against evil, s/he's now [[spoiler: {{DePower}}ed back to his/her usual self]], with the added bonus of putting him/herself in debt, jeopardizing his/her alignment, and making several powerful entities really, really angry. [[spoiler:Plus coming back to bite the party in new and interesting ways with the death of the Draketooth clan as well as gods alone know how many other innocents across the Western Continent.]] Oops.
** [[ArsonMurderAndJaywalking And on top of it all,]] [[spoiler:his/her mate filed for divorce]].
** Xykon also believes (and this is whole plan) that he will be able to [[spoiler:control [[EldritchAbomination the Snarl]]]]. Instead, he'll just [[spoiler:unleash a god-destroying monstrosity that has no idea of control at all.]] [[DragonWithAnAgenda Redcloak]] knows this full well, and has other plans of his own.
** To say nothing of Redcloak recruiting Xykon to help with his plan to [[spoiler:give the Dark One control of a gate]] and then turning Xykon into a lich when the plan went awry, making Xykon far more powerful and far more evil than before, to the point that he overshadowed Redcloak.
* In ''Webcomic/{{Sinfest}}'', [[http://www.sinfest.net/archive_page.php?comicID=2378 a yokel ridicules Satan's stand and sells him his soul. Gets processed, and gets the T-shirt he asked for, and to burn in flames.]]
* In the "K'Z'K" arc of ''Webcomic/SluggyFreelance'', Gwynn summons a demon to wreak vengeance on Riff. Unfortunately for Gwynn, the demon goes about this by possessing ''her'', stealing her soul, and warping her body into some sort of monster. Oh, and it turns out that, once the demon fulfills its contract, it's free to destroy the world.
* In ''Webcomic/CucumberQuest'', [[http://cucumber.gigidigi.com/archive/page-291/ the summoned Nightmare Knight reminds Cordelia that he's not her servant.]]
[[/folder]]

[[folder:Web Original]]
* In ''Roleplay/TheGamersAlliance'', a greedy mage uses an ancient spell in the Second Age to release the imprisoned demon lord [[OmnicidalManiac Yurius]] in order to use him for his bid for power over the kingdom. Yurius immediately kills him for his troubles.
* Wiki/SCPFoundation: [[http://scp-wiki.wikidot.com/incident-report-668-682 Incident 668-682]], where a disgruntled agent (subsequently referred to as "the Victim") tries to smuggle a weapon to OmnicidalManiac SCP-682.
* For most of ''Machinima/RedVsBlue: Revelation'', the Meta seems to be treated as a guard dog of sorts by Agent Washington, and manages to somehow be a comedic foil for Wash and Doc. [[spoiler: At the end of the series, he captures the AI Tex to return his lost powers, and promptly returns to being the AxCrazy ImplacableMan he was in ''Reconstruction'']].
[[/folder]]

[[folder:Western Animation]]
* ''WesternAnimation/JusticeLeague''
** Felix Faust releasing Hades. He learned from his experiences, and was able to live out the more fun side of the trope by possessing Tala later on.
** And with Dr. Milo releasing Doomsday.
--->'''Milo:''' And you'll solve both our problems?
--->'''Doomsday:''' Yes. Release me.
--->'''Milo''' ''(deactivating the restraints):'' ...Wait! What are you doing?
--->'''Doomsday''' (seizing Milo by the head): [[JackassGenie Your problem's solved.]]
** A bunch of teenagers tried to do some cult like ritual hoping it would grant them powers, it goes awry and instead summons Solomon Grundy back from the dead. His first victim was one of the teens.
** Invoked in the finale of the show: Lex Luthor attempts to revive Brainiac from his last known gravesite so he can team up with him again. To do this, he uses the {{Evil Sorcere|r}}ss Tala as a conduit to revive him, a process which will kill her. Unfortunately for Lex, said area was also the gravesite of PhysicalGod and GalacticConqueror {{Darkseid}}, and you get no points for guessing which one of the two [[DyingCurse Tala ends up reviving as a final 'gift' to the man who killed her.]]
* ''WesternAnimation/XiaolinShowdown''. The spirit of a [[RealityWarper nigh-omnipotent]] sorceress who was freed from her puzzle-box prison by Jack in the pilot, and promised him the world if he helped her. Although Jack never quite succeeded and eventually became her adversary, when Raimundo restores her powers with his FaceHeelTurn, she repays him by... granting his every wish and grooming him to rule the world alongside her. It seems she was a villainess of her word after all.
* An episode of ''WesternAnimation/HeManAndTheMastersOfTheUniverse1983'' had an evil sorcerer freeing an evil dragon, and said dragon sticking the sorcerer into his old prison.
** In "To Save Skeletor", Skeletor decides to summon an elder god. You can guess from the episode title how ''that'' worked out.
* In "Computron Lives", an episode of ''The Galaxy Trio'', a group of would-be terrorists find the deactivated Computron, the first villain of the series, and decide to wake him up so they can use his power to conquer the world. They survive the experience, but really ought to have known better, given that his ''defining qualities'' had been his self-determination and contempt for organic life.
* One episode of ''WesternAnimation/CaptainNTheGameMaster'' centers around Mother Brain's quest to free Ganon (the BigBad of ''WesternAnimation/TheLegendOfZelda''), so he could help her conquer Videoland. Unfortunately for her, she ''seriously'' underestimated his [[{{Jerkass}} douchebaggery]]. As Ganon puts it, the only being Ganon serves is Ganon.
* In ''WesternAnimation/TeenTitans'', [[ManipulativeBastard Slade]] cuts a deal with the demonic Trigon to come BackFromTheDead in return for Slade helping the demon take over the world. After Slade fulfills his role, Trigon turns on him. [[spoiler: Slade knew this was going to happen and took precautions. He ends up orchestrating Trigon's downfall and getting his mortal life back, and is still at large at the end of the series while Trigon either was either destroyed or re-sealed in Hell.]]
** [[spoiler: Not really a subversion, or perhaps a DoubleSubversion. ''Slade'', not Trigon, was the SealedEvilInACan, if by sealed you mean ''dead ''.]]
** [[spoiler: Technically, they were sealed in the same can -- Trigon was in Hell because he was a demon, and Slade was there because he was evil and dead. However, Trigon seems to have drawn Slade's soul to him, and ''he '' was the one who instigated the deal. Slade took it because it was the only chance he had.]]
* ''WesternAnimation/DarkwingDuck'',
** [[NebulousEvilOrganisation F.O.W.L.]] decides to find Taurus Bullba (the villain from the pilot and the only non-goofy villain of the series) and rebuild him as a {{cyborg}}. He was pissed. His voice is dripping with bitter sarcasm when he says, "So what if I have to drink motor-oil cocktails for the rest of my LIFE?"
** In the comics, F.O.W.L. high command decided to revive Duckthulu. [[SarcasmMode Surprisingly,]] Duckthulu thanked them by disposing them and continuing to destroy all of reality.
* ''WesternAnimation/DextersLaboratory'': A rare subversion occurred in one episode, "Jeepers, Creepers, Where is Peepers?", where GOOD is not a toy. An evil alien warlord kidnaps [=DeeDee=]'s first imaginary friend, Peepers, a cute yet obnoxious furry critter who rules over her imaginary world of Koosland, to use as a potential energy source for his secret weapon. After being battered around by Dexter and [=DeeDee=]'s other imaginary friend, Koosy, the villain's taunting is cut short as he realizes in an OhCrap moment that he is about to be smushed into a pancake by Peepers, who has mutated (not transformed, but mutated) himself into a flesh-coloured, evil-looking dragon (who also makes his own evil-sounding laugh afterward).
* In the five-part ''WesternAnimation/{{Centurions}}'' episode "Man or Machine", MadScientist Doc Terror recreates an alien MasterComputer on Earth because they share the same goal--ridding the world of organic lifeforms. Terror assumes that as a {{cyborg}}, he'll be spared. He's wrong.
* Shredder from the ''WesternAnimation/TeenageMutantNinjaTurtles1987'' series has problems with this. In the pilot, he teams up with the brain from Dimension X Krang, but refuses to create a new body for him because of this trope, but caves in later on. Once the bad guys and the Technodrome end up in Dimension X, Krang takes charge. This pops up later on in ''WesternAnimation/TurtlesForever'', when Shredder rescues his counterpart from the 2003 series from imprisonment on an asteroid for the purpose of a VillainTeamUp. Unfortunately, the DarkerAndEdgier Shredder not only takes control of the Technodrome and Krang's technology, but also decides to wipe out creation himself.
* In ''WesternAnimation/TransformersPrime'', Megatron tries to revive Unicron so he can rule by his side. When Unicron wakes up he tells him he was wrong about two things: 1) Unicron woke up himself without Megatron's help, and 2) Unicron wants to ''destroy'' the universe and everything in it, including the Decepticons.
* In ''WesternAnimation/JackieChanAdventures'', Valmont's dealings with the demonic dragon Shendu ultimately lead to his ruin. In the third season finale, Shendu (now a spirit) pulls this on [[EvilSorcerer Daolon Wong]], who offers to resurrect him in exchange for the Dragon Talisman power that his body will attract. To absolutely no-one's surprise, Shendu takes both the dragon power and the two Wong had managed to acquire.
* In "Birds of a Feather", an episode of ''WesternAnimation/BatmanTheAnimatedSeries'', Veronica Vreeland brings the Penguin into her social circle as a publicity stunt. He eventually finds out he's being used, and in his true flamboyantly villainous fashion, kidnaps and attempts to murder her.
* In ''WesternAnimation/Ben10UltimateAlien'', Vilgax messes with Diagon's seal in an attempt to claim the demon's power and is promptly mutated and enslaved by it. [[spoiler:The "Evil" [[HijackingCthulhu eventually turns out to be Vilgax]].]]
* In ''WesternAnimation/ScoobyDooMysteryIncorporated'', Professor Pericles spent the entire series and a good chunk of its backstory trying to [[spoiler:free the entity in the sarcophagus that drove most of the plot hoping to claim its power. In the end, he finally does, only for said entity to use Pericles as a physical vessel, killing him in the process.]]
* In ''WesternAnimation/MyLittlePonyFriendshipIsMagic'': Celestia decided to release Discord, a LaughablyEvil MadGod, so she could put his RealityWarper powers to productive use. Even her most faithful student thinks she's crazy for seriously considering this and even more so for thinking he could be [[HeelFaceTurn redeemed beforehand]]. [[spoiler:Fluttershy succeeds by befriending him.]]
* In ''WesternAnimation/DannyPhantom'': Vlad Plasmius attempts to gain enormous power by stealing the Crown of Fire. [[SealedEvilInACan He opens the sarcophagus]] of [[EvilOverlord Pariah Dark]], waking him up. Within minutes, Vlad is beaten, and is forced to team up with Danny to stop him.
[[/folder]]

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