Evil Is Not a Toy

"Do not call up that which you can not put down."

Not all manufacturers of Sealed Evil in a Can use child-resistant caps.

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

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 understanding of loyalty or gratitude at all. Bob may end up being killed on the spot, or he may be enslaved by the sealed evil — bonus points if the one who freed it sought to enslave the evil themselves. The sealed evil may make a bargain that it has no intention of honoring (or it may promise Bob he will be rewarded "as he deserves"... guess what he deserves?). Or it may simply refuse to obey him. If he's very lucky, Bob may merely be forced to become the newly-unsealed evil's minion on pain of death. In any case, if Bob was the Big Bad before, he was really just a Little Bad; the formerly-sealed evil is the true Big Bad. In the event that Bob survives, this is a leading cause of Enemy Mine twists, since Bob now must seek any allies he can find to deal with the evil that he unleashed.

In some cases, the sealed evil has further need of Bob; perhaps it is in some way at his mercy, or it needs him to perform a task that will free it fully, or it is just feeling sadistic. No matter what, it will always manipulate Bob into doing its bidding, stringing him along with promises of power and/or wealth, before finally pulling a Did You Actually Believe...? on Bob the moment it no longer needs him. After all, you certainly don't get rewarded just for doing what you're expected to do, especially after You Have Outlived Your Usefulness. Other times, the evil being may ask Bob what exactly he expected after releasing an evil being.

This goes triple for anyone attempting to activate a hero's Super-Powered Evil Side. Unless you are The Emperor 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, 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 they have small parts and it may not choke on them.

All too often the character will die horribly within seconds of uttering "Now its power is MINE!"

This goes both ways, as sometimes Bob is the Sealed Evil in a Can and the villain he's trying to dupe into releasing him is the one who's not a toy, and as such will brutally subjugate Bob the moment he underestimates the releaser.

This trope often overlaps with Deal with the Devil, as people's deals with the evil almost always screws them over in the long-run.

See also This Is Your Brain on Evil. If Bob created the evil in the first place, it's a case of Turned Against Their Masters. When the evil actually is a toy, it may coincide with My Little Panzer, or a Killer Rabbit. If the Evil in question is a Greater-Scope Villain, expect the lesson to be particularly painful. Contrast Holy Is Not Safe, where concentrated goodness is similarly threatening, Hijacking Cthulhu, where the "lesser" evil really does make a toy of the "greater" one, and With My Dying Breath I Summon You, where the summoner dies before the evil does anything to him.


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    Anime and Manga 
  • In Digimon Adventure 02, when creating Kimeramon, Ken/the Digimon Emperor comes across the remains of Devimon, who warns him that "the powers of darkness cannot be controlled." Ken dismisses the warning and harvests Devimon's data to use in Kimeramon's creation; sure enough, Devimon's influence soon leads Kimeramon to turn against his creator.
  • Kaolinite was instantly killed by Mistress 9 in Sailor Moon upon her revival. Likewise Metaria possessed Queen Beryl in the end of the first season.
  • Dragon Ball:
    • Emperor Pilaf, the Ineffectual Sympathetic Villain from early Dragon Ball, comes across the jar containing the Demon King Piccolo and releases him, hoping to mooch off of Piccolo's conquest. Piccolo initially goes along with it, but the minute he's used the Dragon Balls to restore his youth and full power, he kicks Pilaf and his Co-Dragons off of their own airship, after which Mai remarks to Pilaf that they never should have trusted King Piccolo, let alone set him loose, to begin with.
    • In Dragon Ball Z, 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 childish to think of such things. Even when Babidi insults Buu and threatens to re-seal him, the clearly enraged Buu backs down. Then 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 Good Feels Good... Then a vigilante tries to kill him and nearly offs his new best friend in the process. Cue Enemy Without.
    • In the Universe Survival Saga of Dragon Ball Super, when Majin Buu falls into a two-month long hibernation, leaving them one member short for the Tournament of Power, Goku, having no other choice, arranges for Fortuneteller Baba to revive Frieza for one day to compete for them. Frieza makes it very clear to Goku and the Z-Fighters that they have only the barest vestiges of a leash on him, and immediately starts plotting against them.
  • Death Note has Ryuk toward Light. Ryuk dropped a Death Note close by for Light to pick up, basically giving him a chance to kill people by the stroke of a pen. And for majority of the series, Ryuk more appears like a Harmless Villain, looks creepy, but ultimately spends his time watching Light's antics, eating apples or playing Mario Golf. It isn't until the end, when Light has been exposed as Kira and has "become boring" that Ryuk proves that he's still a Shinigami and writes Light's name into his own Death Note, just as Ryuk told him he eventually would.
  • Mazinger Z gives a textbook example. Dr. Hell searched and found the army of giant robots that legends rumored the lost civilization Mykene used, and thought he could control them through the rod of Rhode (a device he invented) and use them to Take Over the World. However, the Mykene civilization still existed, 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 Lost Technology 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 the Mykene Empire conquer the surface world instead of Hell.
    • He also does it in an one-shot chapter drawn by Ken Ishikawa (called Mazinger-Z: Relic of Terror and later adapted to Mazinkaiser manga and Shin Mazinger) 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 Slayers, the original Rezo found out that he would have to release Shabranigdo in order for Rezo to be able to 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 Shabranigdo was actually sealed inside of Rezo; the very act of opening his eyes breaks the seal and allows Shabranigdo to 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... the Lord of Nightmares itself is released inside Lina's body. It then promptly obliterates Phibrizzo.
  • Hell Girl 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 Yu-Gi-Oh!, 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 Egyptian God Monsters. No wonder the game soon became Serious Business. (After said gods were placated, the game continued to be a Weirdness Magnet 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 Yu-Gi-Oh! GX, both Fubuki Tenjoin (Atticus Rhodes in the English dub) and Yusuke Fujiwara seem to have trouble grasping this concept and end up using a Mask of Power and developing (the same) Super-Powered Evil Side. 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 Super-Powered Evil Side, 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.
  • Tears to Tiara 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 Big Bad, Arawn turns out to be the Noble Demon protagonist.
  • Umineko: When They Cry: 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. However, it turns out to be a subversion; he's been dead for more than a year.
  • This trope is a common theme in Chrono Crusade, 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 Deal with the Devil to have a pair of demon horns on his head.
  • In Monster, various shady forces- a conspiracy or two consisting of Neo-Nazis, mad scientists, and ex-Secret Police amongst others- all want to use Johan to bring about their One World Order. Johan is also implied to be The Antichrist. For real. As Tenma points out, he is not interested in ideas of racial or ethnic superiority, for he "laughs at all of humanity". Ultimately he plays along with their plans for his own ends- namely, The End of the World as We Know It-, only to suffer an existential crisis and 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 Bleach, relying on the Hogyouku for power proves to be Aizen's undoing. Even though he survives Ichigo's Mugetsu and is on the verge of attaining even greater power, 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 activates a kidou Urahara hid inside Aizen which turns him into a Sealed Evil in a Can.
  • In 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 Tobi, 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 Evil Plan 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 Killer Bee, 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 before the Akatsuki ripped it out of him.
    • During the 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 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.
    • During the beginning of the Fourth Shinobi World War, Kabuto Yakushi uses Orochimaru's Edo Tensei jutsu to resurrect several past characters as zombies under his control, including the real Madara Uchiha. When Kabuto is defeated and the jutsu is broken, Madara frees himself from the seal binding him to it, telling the five Kages to make sure to punish Kabuto for delving in forbidden jutsu before making his escape.
    • Even Madara Uchiha admits that the Ten-tails might be difficult to control as it mutates. That said, when he finally merges with it he has no problem handling it because they want the same thing.
    • And then, Madara gets hit by this when his ultimate plan turns out to have just been the resurrection scheme of someone even worse, who immediately possesses him.
  • InuYasha:
    • Onigumo made his fateful deal with demons to become Naraku hoping he'd be able to control his new body. Instead, the demons suppress his consciousness, leaving Naraku himself in full control.
    • In the first movie, Ruri, one of Menomaru's Co-Dragons, copies Miroku's Wind Tunnel for her own use. During the climax of the film, she deliberately uses a knife to expand her own Wind Tunnel in an effort to overwhelm Miroku, only for it to promptly breach the confines of her palm and consume her. That's what happens when the power you copied is the product of a demon's curse, Ruri.
    • At one point, Naraku deliberately breaks the seal on Ryukotsusei, the dragon daiyokai who slew Inuyasha's father and was sealed by him in turn, and tries to encourage him to avenge himself by killing Inuyasha. Instead, Ryukotsusei attacks Naraku himself, deeming him to be nothing but an eye-sore, before electing to fight Inuyasha simply out of boredom.
  • In Star Driver, Glittering Crux gets a taste of this in episode 14 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 Fairy Tail, Zancrow gloats about retrieving Zeref. Seconds later, he is slain by a burst of Zeref's uncontrollable "Death Magic".
    • 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 Hades' magic horror world, and also that Hades trying to drag him into the whole thing has angered him enough to intentionally kill him.
  • Alan Gabriel in The Big O learns the hard way what happens when somebody thinks the Megadeuces are just a type of Humongous Mecha. Ye Guilty.
  • In episode 3 of Soul Eater, 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 leading Crona down the path of becoming a replacement for Asura is more successful because she has no intention of controlling the final outcome.
  • Rosario + Vampire: Gyokuro steals Moka's rosary and uses it to control Alucard. It works at first, but Moka ultimately takes back her rosary, and Gyokuro is promptly devoured by Alucard as a result.
  • Surprisingly subverted with Stroheim in Part 2 of JoJo's Bizarre Adventure. The story plays out in such a way to make the viewer believe it's going with the standard plot of "Nazis unearth some ancient evil power and try to find a way to harness it, only for it to blow up in their faces." However, it's revealed that, as soon as they discovered Santana and the power he possessed, they realized that he's far beyond their control, and Stroheim was trying to find a way to destroy him instead. Unfortunately, that doesn't stop Santana from awakening and wreaking havoc anyway.
  • In Brave10, despite what Hanzo and Date think it's quite clear that Izanami is a dangerous force that cannot be controlled and should not be messed with.
  • The Hentai Bible Black features the eponymous Black Bible, a spell book that some of the main protagonists have used to cast romantic spells, and other curses for fun and profit. Said book also has spells to summon demons (years before, a character had to learn the hard way that said spell required a human virgin sacrifice.) The victim of an attempted human sacrifice made a Deal with the Devil to stay alive long enough to find a soul to exchange for her longevity, and has chosen the hero's Childhood Friend as her sacrifice.

    Comic Books 
  • A lot of Hellboy's enemies seem to think that they can use the Right Hand of Doom and 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. The Fair Folk and witches revive a mad Nimue to wage war on humanity, The results are far more horrifying then anyone expected.
  • Sebastian Shaw, foe of the X-Men, helped to develop and secure funding the mutant-hunting Sentinels, figuring if he builds them instead of someone else, he can instill a Restraining Bolt to keep them from recognizing him as a mutant. This led to the Days of Future Past, a Bad Future where the Sentinels Turned Against Their Masters and waged a genocidal war on mutants everywhere.

    Another Hellfire Club member didn't fare much better. Mastermind learned The Dog Bites Back when he twisted Phoenix into Dark Phoenix.
  • The Phoenix Force is the big topic of Avengers vs. X-Men. The Avengers are on this side of the trope thanks to Wolverine while Cyclops believes the Force will bring back mutantkind, which has been largely depowered. When five mutants gain control of the Phoenix Force, the Avengers grab hold of the Idiot Ball as they continue to espouse this trope.
  • Invoked in Superman story Kryptonite Nevermore. In order to cure Superman's illness, Wonder Woman's mentor I-Ching performs a dark magic ritual. He is aware of the risks and the foolishness of playing with black magic, but he thinks there is no other way to help the Man of Steel.
  • In Superman/Supergirl story War World, alien overlord Mongul appropriated a star-sized weapon-satellite built by a race of warmongers who passed away right after building it. It never occurred to Mongul that both events could be linked and Warworld might bring death to its owner.
  • In Supergirl story arc Bizarrogirl, Bizarro Lex Luthor sent a signal into the core of the planet, hoping to find someone to come out and help him kill Bizarro, but the signal went in the opposite direction and attracted a planet-eating monster.
    Supergirl: What happened to Bizarro World, Lex? And what is the Godship?
    Bizarro Lex: Godship am Big Bad. And it came because of me. Me was trying to find worstest way to hurt Bizarro #1, my worstest enemy, so me sent signal into core of the planet, hoping to find someone to come out and help. But signal went opposite direction into space and it attracted—
  • In one Witchblade/Tomb Raider 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.
  • Doctor Strange 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 Siege, Norman Osborn and Loki realize just how badly they underestimated The Sentry/Void's power and evil.
  • In 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.
  • John Constantine's first rule of magic: Never summon up something you can't put back down. He learned this the hard way in Newcastle in '77.
  • Pretty much Once per Episode in Vampirella, someone will make a Deal with the Devil, only to realize too late that they got more than they bargained for.
  • In New Suicide Squad #1, Amanda Waller loses full control of the team of supervillains and has to share it with Victor Sage. Unlike Waller, however, Sage treats the Squad (sorry, Task Force X) like his personal fantasy league, introducing stupid changes like renaming the team Task Force XL, hiring the extremely mercenary Deathstroke without the requisite Explosive Leash and putting together Harley Quinn (who recently gave up on the Joker for good) and Loony Fan Duela Dent (the self-proclaimed "Joker's Daughter"), in a bid to draw the Joker out of hiding so that they can put him on the team. Deathstroke betrays the team five minutes in, Harley brutally beats up Duela, and due to Sage's incompetence, Deadshot's aim is crippled. Waller chews him out for his colossal ego and absolute lack of foresight.
  • 2000 AD:
    • Judge Dredd: During the Day of Chaos, a Sov sleeper agent releases the three remaining Dark Judges (the fourth, Judge Death, is trapped in Hell at that point) to add to the escalating clusterfuck in Mega City One. The two spies who give the undead monsters new bodies are the first to die.
    • Tales of Telguuth: A man is blackmailed by a demoness to free her demon husband by finding the tomb where he was locked up by a powerful wizard (which she is barred from entering herself) and removing an enchanted ring from his hand. He tries to remove the ring by cutting off the sleeping demon's finger, finding out that he can control the demon as long as the Ring of Power binding him stays attached to the finger. He forces the demon to kill his own wife because she had planned for the man to be eaten by her husband, then uses him to take over the nearby kingdom. This backfires when the demon refuses any further commands because the ring has slipped off the by now shrunken finger, and tears apart his would-be master.
  • In Hack/Slash, a company named Ceutotech captures various Slashers and tries studying them, with the intend to replicate their Healing Factor and adapt it for cosmetic purposes. Predictably, the Slashers end up escaping, wreak havoc in the facility and Ceutotech's head Emily Christie gets turned into a Slasher herself for her trouble.
  • In Athena Voltaire and the Immortal Power, Major Klimt and Herr Faust (a Meaningful Name, that) really don't know what they're doing, and Athena thinks the smart response would be to just sit back and watch the fireworks.
    Athena: Let me get this straight... Ada wanted you to perform a ritual that no one understands, and, if it works, no one has any idea what it does? On top of that, even if you don't perform the ritual, she's prepared your understudy to give it a try — even though he knows even less about it than you do. Call me crazy, but I say we just let 'em try.
  • The Sandman opens with Dream being torn out of his realm and imprisoned by a group of magisters who thought they could summon Death as a neat trick.
  • Runaways loves this trope:
    • In the original series, Alex's secret plan is to bring about the end of the world in the mistaken belief that the Gibborim will reward his family more lavishly if he sabotages the rest of the Pride. This theory turns out to be false, and the Gibborim straight up kill him.
    • In the second series, the New Pride tries to renew the original Pride's efforts in order to resurrect Alex. They fail, thankfully, but not before killing Gert. And then Chase tries to make his own deal with the Gibborim, offering his own life to sustain them in exchange for Gert's resurrection. His plan is so poorly conceived that the Gibborim nearly kill the entire team.
    • Another arc sees an old man accidentally summoning a monster in an attempt to bring back his dead wife.
  • In JLA: A League of One, a bunch of goblins, who have become peaceful and complacent, find the sealed tomb of their mistress, the colossal dragon Drakul Karfang, and wake her up in a bid to regain their importance. First thing she does upon waking up is to taint them into mindless monsters and send them off to assault the towns above.
  • Sonic the Hedgehog/Mega Man: Worlds Collide: While held captive, Dr. Light reminds both Eggman and Wily of the numerous times the two have toyed with forces they thought they could control, only for it to blow up in their faces and result in Sonic and Mega Man having to save them from their own stupidity, stating that their plans to rewrite reality with the Genesis Wave will undoubtedly end the same way:
    Dr. Light: Albert... You thought you had complete control of Ra Moon, Gamma, King, The Stardroids, Roboenza, and Bass? You've toyed with things you cannot handle for years, and Mega Man had to save you from yourself. And from what I've heard, you're no different, Doctor Eggman. Chaos, The Ark, Emerl, The Time Eater? If not for Sonic, you wouldn't have a world to conquer.
  • In Justice League vs. Suicide Squad, Max Lord obtains the Heart of Darkness, takes possession of the powered members of the Justice League, then proceeds to take over the United States. When he brings in Amanda Waller to show her the fruits of his labor, he boasts that he has everything under control, even using a tattoo to protect him from the gem's owner. However, when Waller shows Max that he's sent the world into chaos, Max is horrified. Then, Eclipso takes over his body.
  • Satan's Hollow revolves around a Satanic cult trying to open a portal to hell through Human Sacrifice. In the backstory their previous leader messed up the ritual when his last victim escaped, and was turned into a Living Shadow by the Devil as punishment for his failure. The epilogue shows that the same fate has befallen his partner-in-crime.
  • Arawn: Anyone who thinks they can somehow control the Cauldron of Blood is a misguided fool. It may offer its current owner great power, but it's always on the look-out for a new Master and its only real goal is to acquire as many souls as possible for itself to feast on.

    Fan Works 
  • The My Little Pony: Friendship Is Magic 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.
  • Played for Laughs during Theory of Chaos:
    Chaos: How is it that I'm supposed to do your schoolwork? I'm CHAOS!! Not some sort of encyclopeadia!
  • In the Danny Phantom fanfic Facing the Future Series, Clockwork lampshades Vlad's many attempts to gain power beyond his control in his "Reason You Suck" Speech 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?"
    • Showing that he learned absolutely nothing from that total failure. he then promptly proceeds to try and use a Fenton device to steal the power of Dan, Future Danny and Future Sam. Not only does he get electrocuted multiple times trying to rewire the device, he ends up healing Dan of all the damage the future heroes had managed to inflict on him!
  • In Tails of the Old Republic, Tails thinks back on the occasions Eggman fell into this trap
  • In Yognapped, Peva frees Herobrine from beneath the bedrock layer, planning to partner up with him and destroy Minecraftia. Herobrine briefly considers this, before scorching Peva's hand, completely obliterating his gathered troops, and going off to fulfill his own agenda.
  • Rosario Vampire: Brightest Darkness: Fairy Tale has a very bad habit of trying to take control of powerful beings and artifacts for their own purposes. While they may have no problem controlling them at first, more often than not, it blows up in their faces in the end.
    • In Act II, they manage to get their hands on Apoch and Astreal's original summoning spell and use it to create their own personal Clone Army of slaves. By chapter 51, the clones have snapped under the constant abuse and turn on them, helping Tsukune and co. put an end to Fairy Tale's Ashton City branch.
    • In Act III, Kiria hopes to harness Tsukune's inner ghoul, planning to infect it with Blackheart and sent back in time to the Battle of Kahdaln to rewrite history in favor of the monsters. In chapter 52, when Tsukune deliberately unleashes it, the ghoul promptly pounces on Kiria and both dismembers and disembowels him with his bare hands while Kiria tries in vain to reason with it. In a double-dose of this trope, it's more-or-less general knowledge that ghouls are nothing but animals who are only concerned with killing everything they see, and Tsukune's ghoul, despite having its own personality and conscious mind, is no exception.
    • In Act VI, Gyokuro makes a clone of Luna, enhanced with a quadruple overdose of improved Blackheart, named Discord, intending for it to be a new Alucard under her control. According to the Act VII preview chapter published at the very end of Act VI, when Discord is completed, it will rage out of control and destroy the entire universe.
  • In Prison Island Break, Shadow the Hedgehog doesn't like being told what to do. His insanity results in what Knuckles jokingly refers to as 'Shadow Logic' (a combination of Insane Troll Logic and Poe's Law), under which he would start a forest fire to light a cigarette. On top of that, he uses poorly conceived gambits that succeed, but with horrible knock-on effects.
  • This Gravity Falls/My Little Pony: Friendship Is Magic crossover comic involves Starlight Glimmer making a deal with none other than Bill Cipher. It's pretty easy to guess what happens afterwards.
  • Zigzagged in the The Legend of Zelda fic Wisdom and Courage. Veran finds Majora's Mask and successfully gains its power under her control, but it turns out that Majora only allowed her to do so of its own free will, admitting to Link during their Battle in the Center of the Mind during the final showdown that it had planned to betray Veran and seize control of Hyrule for itself all along.
    • Veran actually pulls this off twice. During the final battle, she genuinely believes she can take control of Fierce Deity Link, only to be proven wrong when Link breaks free of her control and defeats her. Doubly do, since Veran had actually fought the Fierce Deity previously and knew that it could potentially defeat her.
  • Inverted in Kingdom Hearts fanfic Stygian Solace. Due Riku's unavailability as a host, Ansem, Seeker of Darkness gets the next best person Kairi. However, this results in the creation of Yami as Ansem's heartless is slowly purified by Kairi's pure heart.
  • Time Lords and Terror: Hydia spends the entire story trying to free the S'Muz from its can so that she can use it to destroy her enemies. Naturally, she ends up being the first thing it kills.
  • A Storm of Chaos: A Doctor Whooves Adventure: Borusa, the true Big Bad, steals Discord's statue and frees him, just so that he can experiment on him for the secrets of immortality. When the Doctor frees Discord during the climax, he proceeds to torture Borusa before turning him to stone.
  • Neon Genesis Evangelion: Genocide:
  • Guardians, Wizards, and Kung-Fu Fighters:
    • Lothar willingly takes on the Ninja Khan mask to destroy the Guardians and avenge Raythor. This backfires horribly, as the Oni inside the mask, Uta, ends up possessing him.
    • Hak Foo keeps Ikki's mask on for so long that it starts devouring his chi. When it's removed, he's left virtually catatonic.

    Films — Animated 
  • In Disney's Aladdin: The Return of Jafar, 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 cannot kill, but Jafar keeps repeating ominously, "You'd be surprised what you can live through.") Also, Jafar is the epitome of the Jackass Genie, so it's not like he can make his wishes and be on his way.
  • Another Disney example would be The Princess and the Frog. The "Friends on the Other Side" are not at all friendly, as Dr. Facilier realizes way too late in the finale.
  • Rasputin of Anastasia was so blinded by his hate for the Romanovs that he really didn't think through his Deal with the Devil. Swearing "not to rest until the last Romanov is dead" unwittingly turns him into a decaying lich because Anya is still alive. Then, when she destroys his Soul Jar, the dark forces immediately intervene to collect on their deal and he dies rather horrifically.
  • In the 2009 Astro Boy movie, Stone is very enamored of the explicitly evil Red Core. Experience fails to teach him that you must not play with it.
  • In Marvel's Hulk VS 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.
  • Batman: Under the Red Hood:
    • What kicked off the entire plot was Ra's Al-Ghul hiring The Joker to keep Batman and Robin distracted, believing he could control him. He's proven wrong when Joker goes against his plan by kidnapping Robin and ultimately killing him.
    • Black Mask also has some idea of what is going to happen if he releases the Joker, but after the Red Hood fires a rocket launcher at Black Mask, who narrowly survives, the criminal doesn't think he has much of a choice.
    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 Batman: Mask of the Phantasm, Sal Valestra enlists the Joker's help as a hitman against Batman, whom he thinks is killing off mob bosses. The Joker promptly murders Valestra to use as bait for the hit he himself ordered.
  • In The Incredibles, Syndrome sics his own custom-built robot onto a city which he would "save" its people from, all to get back at Mr. Incredible for supposedly slighting him. However, he forgets how intelligent he programmed the robot to be.
  • In Scooby-Doo! and the Witch's Ghost, Ben Ravencroft summons the evil spirit of his witch ancestor in hopes of ruling the world together along with her. What he didn't count on was that she was less Evil Overlord and more Omnicidal Maniac.

    Films — Live-Action 
  • The Hellraiser series shows that demonic torturers are never to be trifled with by ambitious summoners:
    • In 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 Hellbound: Hellraiser II 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 Hellraiser: Bloodline, 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.
  • In Mighty Morphin' Power Rangers: The Movie, Ivan Ooze is freed from his prison by Lord Zedd and Rita Repulsa, who hope to get him to join them. Given Ooze utterly hates Zordon, he's perfectly happy to ransack the Command Centre and leave Zordon for dead. However, when Zedd tries to continue treating him like a minion, Ivan traps them in a snowglobe and usurps their base and minions for his own purposes.
  • In 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 The Mummy Returns, a museum curator, Hafez, deliberately digs up and raises Imhotep, thinking that 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.
  • 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 Zombie Apocalypse. The adults of the movie barely punish him for this.
  • In Pirates of the Caribbean: At World's End, both Barbossa and Beckett are convinced they have what it takes to keep evil on a 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. Several other pirate lords comment on this, certain she'll immediately smite them in revenge if she gets her powers back. As she reveals to Davy Jones, they're right. The only reason she doesn't is because Will tells her that Davy Jones (her former lover) was the one that taught the pirate lords how to bind her. Instead of smiting anyone, she creates a maelstrom to put two sides she hates at a Mutual Disadvantage.
    • Then, there's Davy Jones, Calypso's ex-lover turned heartless Reaper, who Beckett has enslaved and intends to have take on the entire Brethren Court for him. The moment Jones has the chance, he horribly murders Beckett's Dragon. The only reason he doesn't kill Beckett too is that he then loses the fight against the Brethren Court. Had he won, Beckett surely would have been next on his list.
  • The Librarian: 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 Freddy vs. Jason, 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 escape from Hell and continue killing himself. The plan works, but Freddy failed to anticipate that Jason wouldn't stop killing, stealing Freddy's potential victims in the process.
  • Dr. Flemming in The Lost Skeleton of Cadavra becomes the titular skeleton's bitch after resurrecting him.
  • Dr. Cocteau in Demolition Man brings convicted criminal Simon Phoenix out of cryogenic imprisonment and gives him all sorts of Crazy Awesome weapons and combat training so he will kill rebel leader Edgar Friendly. Since Phoenix is already an Ax-Crazy terrorist and mass murderer, this ends badly for Dr. Cocteau.
  • In the film version of The Wave, a teacher starts a youth movement to make his lessons about autocracies more immersive. While the students initially play along just to humor him, the Wave soon spreads beyond his control. Realizing that he also got into his leader role a bit too much, he summons the class together to call the whole thing off and show what they have become. The class outcast refuses to believe it and whips out a loaded gun.
  • The Dark Knight Saga:
    • Batman Begins: 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.
    • The Dark Knight: The mob finally turns to The Joker to take down their ever-growing nemesis Batman. However, they don't fully understand what drives the Joker.... He ends up burning all of the mob's money and (directly or indirectly) leading to the deaths of the most powerful mob bosses in Gotham. His machinations cripple the mob in a way Batman could have never dreamed of.
    • The Dark Knight Rises: Bane is hired by Daggett to commit a robbery on the Stock Exchange and bankrupt Bruce Wayne. As it turns out, Bane was using Daggett all along, with Bane ultimately betraying and killing him.
  • In 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 Judge Dredd, 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 Star Trek Into Darkness is kicked off by the fact that Admiral Marcus tried to use a man named John Harrison to make weapons for Starfleet. So, what's the problem here? John Harrison is just a pseudonym. He's really the revived Khan Noonien Singh. This ends just as well as you'd expect.
  • Jerry Lundergard in 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 Alien franchise is perpetuated by 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 Alien: Resurrection 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 Elysium thinks she can keep Agent Kruger on a leash. When he screws up, she starts chastising him for his recklessness. This bites her in the ass. Big time.
  • In X-Men: Days of Future Past, Wolverine and Professor X free Magneto from his metal-free prison to get him to stop Mystique. Of course, he develops his own agenda...
  • Death Warrant: The prison officials, on the orders of their mastermind, bring the Ax-Crazy 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.
  • Transformers: Age of Extinction reveals that humans have been using parts of Decepticons (including Megatron) to build their own Transformers. Guess what happens. No go on, guess.
  • In Batman v Superman: Dawn of Justice, Lex Luthor turns Zod's corpse into a mutated, unstoppable "deformity" (Doomsday) as his trump card against Superman. As soon as Doomsday is released, the first person he attacks is, naturally, Luthor himself - had Superman not got in the way of the punch, Luthor would have been paste on the wall.
  • In Suicide Squad, Amanda Waller thinks she can control Enchantress (an immortal sorceress from another dimension) indefinitely. It backfires, as Enchantress finds a way to escape containment and free her demonic brother, and ends up a world threat. She's actually the first problem Task Force X (the Suicide Squad) is sent to handle.
  • Kull the Conqueror: General Taligaro and the dead king's cousin decide to revive an ancient demon witch queen to remove Kull from the throne of Valusia. This of course ends up backfiring when she demotes them both to mere minions and takes over herself.

  • At the climax of C. S. Lewis's The Last Battle, 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 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 subsumed by demons. His last words as himself are utterly terrified.
  • Discworld:
    • In Guards! Guards! Lupine Wonse, the Patrician's Evil Chancellor, 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 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 Lords and Ladies fooled around with elves, despite the old wives' warnings. Disaster ensued, because elves are Not Nice.
    • An interesting twist in Witches Abroad: Lilith's not-a-toy evil turned on her in the form of her own reflection. Definitely Karmic Death.
  • In Glen Cook's The Black Company novels, the Lady was originally bound by the White Rose along with her husband, the Dominator, and their henchmen: the Ten Who Were Taken (nice name for a metal band, eh?). The Lady, the Dominator, and the Taken were also Sealed Evil in a Can, and had been released by a wizard named Bomanz who wanted to use the Lady's power.
  • In Terry Brooks' 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 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 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...
  • "Do not call up that which you cannot put down" was the advice given to a necromancer from H.P. Lovecraft's "The Case of Charles Dexter Ward." He didn't listen. More to the point, 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 Tad Williams' Memory, Sorrow and Thorn trilogy, evil priest Pryrates casts a massive spell to bring the undead Storm King back into the world, with the promise that he would be "first among men". He is, indeed, the first... to be killed. It doesn't help that he tries to pull a Starscream on the Storm King first.
  • As big as the Star Wars Expanded Universe is, you know this trope had to come up somewhere. Grand Admiral Thrawn went and fetched the insane clone (but 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 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 took control of a Star Destroyer was... unnerving.
    • Jerec, in Galaxy of Fear, 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 The Force.
  • In the Old Kingdom books:
    • The villain of Sabriel, Kerrigor, is released from his imprisonment beyond the fifth gate of death by some nameless necromancer who "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. Anyone who actually managed it got recruited by the Destroyer to help bust him out of his can. Chlorr just ended up as another minion.
  • In the Warhammer 40,000 Blood Angels short story Blood Debt, 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 the Warhammer 40,000 Literature/Ultramarines novel, ''Nightbringer, Kasimir de Valtos, a greedy and corrupt human industrialist collaborates with Dark Eldar pirates to acquire the Necrontyr artefacts required to free the C'Tan known as the Nightbringer, in the belief it will make him immortal for freeing it as a reward. Unfortunately when they free the creature, the minds of Kasimir and his allies are briefly connected to the Nightbringer's through an empathic link as it awakens, at which point their minds breaks at the realisation the Nightbringer is as far removed from them as they are from insects, and the C'Tan has no reason to even acknowledge his existence, let alone reward him. Most of those present go mad and kill themselves on the spot and Kasimir is reduced to tearfully begging the Nightbringer to make him immortal, which only results in the creature deigning to notice him for long enough to kill him.
  • In Dark Lord of Derkholm, Derk is required to summon a demon (and a God) as part of an 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. He doesn't.
    Derk: Why me?
    Tripos: Because you are more easily put aside than other wizards, of course.
    • Although as it turned out, Tripos, the Demon King he summoned, was more interested in recovering his enslaved mate from the Big Bad 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.
  • Harry Potter:
    • Draco Malfoy learns this the hard way in Harry Potter and the Half-Blood Prince when he replaces his incarcerated father as a Death Eater, but soon finds himself in way over his head when the Big Bad orders him to perform an almost impossible task (assassinate Dumbledore) under penalty of his entire family being killed.
    • The entire family is hit with this lesson in the course of it - having willingly joined up with Voldemort in the first war, they now get a painful lesson in how expendable his servants (and their families) are to him.
    • 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 vivisects the target.
    • In the next book, Harry discovers that Regulus Black, Sirius' Death Eater younger brother, also learned this lesson, much like Draco. Regulus died betraying Voldemort.
  • In The Tamuli, God of Evil Cyrgon decides to summon Klael, a being of infinite power and malevolence, capable of crushing Gods like ants and eating Eldritch Abominations for breakfast, and tries to control said being and make it his minion. That's just asking for trouble. It didn't end well for Cyrgon, predictably enough.
  • In Charles Stross's The Laundry Files:
    • In The Atrocity Archives Nazis from an Alternate Universe have summoned an Eldritch Abomination to help them defeat the Allies, win the Second World War, 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 Eldritch Abomination might decide that it was time to eat them after finishing off everything else. 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 when some amateur cultists try to use him as the host for a summoned Eldritch Abomination - and screw it up very badly.
    • In The Jennifer Morgue Billington intends to fish an ancient continent-crushing war machine created by one of elder races from oceanic depths and repair it because its controlling intelligence mind screwed him into obedience when he tried to contact it.
  • One of the Robin Jarvis books has a powerful warlock releasing a giant serpent from its magical sleep, believing that he can use his magic to control it. 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 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. Averted. It works.
  • Nakajima of Digital Devil Story 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, The Leader 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 smart enough to see this in the making, and rush to stop this scheme. 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 Earth-Shattering Kaboom in the first place.
  • In Robert E. Howard's Conan the Barbarian:
    • "The God in the Bowl,": Kallian opened a sealed bowl, intending to steal any valuables and claim burglary. He's found dead due to releasing what is apparently a friggin' naga from its prison.
    • In The Hour of the Dragon, a group of corrupt noblemen resurrect a dark wizard from ancient times with the purpose of dethroning Conan as king of Aquilonia. When he succeeds in this task, the conspirators think they can institute their own regime, but the wizard is revealed to be far greater in power and evil than the conspirators, even going as far as calling himself as "the true master of the western nations" and to their horror, they realize too late their folly.
  • The Lord of the Rings:
    • Anyone who would attempt to use The One Ring against Sauron would learn very harshly that the evil corrupting it answered to one master and one master only. It's implied that certain immensely powerful individuals COULD use the ring against Sauron, but none of them do out of fear that the evil within it would twist them into Dark Lords just as terrible as he is. 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 Saruman and Denethor, but Aragorn is able to use his own authority to wrest control of the palantír from Sauron. The lesson is: don't mess with a phone connected to Sauron's as the only number on speed dial unless the party contract to the whole lot is in your family's name.
  • Randall Flagg of The Dark Tower goes through great lengths in order for Roland's (and the Crimson King's) son Mordred to be born. He is killed later for underestimating what he created.
  • The Dresden Files:
    • Victor Sells summons a demon to eat Dresden, not realizing that anyone who heard him 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.
    • Harry Dresden himself has a wakeup call about this in Fool Moon when he summons Chaunzaggoroth (with whom he's dealt before) for information. Chauncy does a pretty good job of acting like just another Punch-Clock Villain going through the motions so wizards will keep summoning him; it's only when that mask slips at just about the last second that Harry realizes that no, he really isn't.
  • Merrin Meredith in Septimus Heap fetches the 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 Ciaphas Cain, 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, they succeed.
  • In the backstory of The Seventh Tower, a woman named Kathilde and her brother wanted to depose Mercur, Emperor of the Chosen and take his place. So they released Sharrakor, Sealed Evil in a Can and ancient shapeshifting Evil Overlord, 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 Peter F. Hamilton's 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 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 The Wardstone Chronicles; when confronted with the option of summoning 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 siding with the protagonists after the Devil is summoned anyway because of this.
  • In R.A. Salvatore's 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.
  • In the Merry Gentry books, the Nazis attempted to forge an alliance with the Sidhe, to help in the fight against the Allies and Soviets. Things went pretty well at first, but of course, the Nazis weren't interested in sharing the planet with the inhuman fae and planned to throw them in the gas chambers and ovens once they'd won. The Sidhe found out about their allies' plan for them, and then the Nazis became a gruesome object lesson on why you should never cross The Fair Folk.
  • In the second book of The Silent War the plot kicks off with the Brotherhood of the Pit ambushing enemies on short notice. They perform a rushed demon summoning, get a far more powerful monster than they intended and immediately lose control of it. It goes berserk on the surrounding area, drawing the attention of the heroes.
  • This is advice very necessary to anyone trying to control spirits in The Inheritance Cycle. While spirits aren't exactly evil, they are very alien, and if you call up spirits and can't control them, then they'll take you over and make you a Shade. This is how Durza, the main villain of the first book, came to be- an apprentice sorcerer summoned powerful spirits to avenge the murder of his master and lost control of them.
  • In Andy Remic's Clockwork Vampire Chronicles, General Graal and Kradek'ka have based their Evil Plan on the premise that with the Soul Gems, they can summon back and gain mastery over the Vampire Warlords. The "summon back" part worked reasonably well, at least.

    Live Action TV 
  • Doctor Who: In short, the lesson many repeatedly learn is: don't mess with Time Lords, Daleks or Cybermen, be they collective or individual. Even if you think your stick is big enough to threaten them into submission with. Very Bad Things happen.
    • The Master ends up pleading in terror after unsealing the Daemon in the serial The Daemons.
    • This happened in The Tomb of the Cybermen (video):
      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. YOU SHALL BE LIKE UZZ.
    • 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 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 brings back the Time Lords, who want to end time itself. Of course, he'd be okay with "the end of time itself", he just (incorrectly) assumed the Time Lords would let him rule with them.
    • 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.
  • In The X-Files episode "Die Hand die Verletzt" 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.
    Mulder:Did you really think you could summon up the devil and then expect him to behave?
  • Power Rangers Jungle Fury:
    • 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.) After that, 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 Super Sentai series Jungle Fury was based on, Juken Sentai Gekiranger. Dai Shi's sorta-counterpart Rio wants to revive 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.
  • Angel:
    • Inverted when an already free demon possesses a boy, expecting to use him as a host. The boy turns out to be Eviler Than Thou, and the demon finds himself trapped inside.
    • Played straight when Gunn attempts to get help from the conduit to the Senior Partners in "A Hole in the World", only to get a No-Holds-Barred Beatdown:
      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 being used as a pawn, and invade Holland Manners' house as he's organized a wine tasting party to celebrate his plan's victory. At that moment, Angel shows up, but instead of saving them as they expect, is pissed as hell at them as well and locks them all in, giving Drusilla and Darla free rein to tear them all apart.
  • In Cast a Deadly Spell where the villain attempts to release the Great Old Ones into the world. Guess he should have made sure he used a real virgin.
  • In one episode of Relic Hunter 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 Chessmaster Big Bads of Heroes regularly fall victim to this in regards to Sylar. They regularly try to recruit him as their 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?"
  • Star Trek: Deep Space Nine:
    • In the last season, Kai Winn joins with Gul Dukat to free the pa wraiths (Bajoran devils) sealed deep inside the planet. While Dukat was insane and knew 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 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 The Federation; it was under his incompetent, drunken successor that the alliance turned sour.
  • Star Trek: Voyager:
  • A frequent occurrence in Supernatural.
    • The major example is apparently Lucifer, who according to Crowley would have destroyed the demons as soon as he no longer needed them.
    • In "Malleus Maleficarum" a group of housewives turn to witchcraft to better their lives. They are horrified to learn that in doing they so they made a pact with a demon and damned their souls to hell. The demon possess one and murders all the others when they either make to big of a scene, annoy her, or turn on her.
    • The witch who summoned the demon Samhain, and was immediately killed after he had a body.
    • The idiotic amateur witch (when will they learn?) 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 Castiel at the beginning of Season 7. He sucked in every soul from Purgatory to make himself powerful enough to kill Raphael, declared himself 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 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.
    • In season 11, Crowley takes in the child incarnation of Amara the Darkness — the primordial evil of the setting which frightens even the likes of Lucifer and Michael — and feeds her souls in a bid to get on her good side and manipulate her. By the end of the episode "Bad Seed", she's become an adolescent and she wants even more souls and it starts to dawn on Crowley that he can't keep up with her demands. A few episodes later and Amara has completely broken free of Crowley's control, only sparing him because he's Not Worth Killing.
    • Crowley does it again in Season 12. Instead of having Lucifer returned to his cage (where he'd be no threat), Crowley has him chained up in his throne room and boasts about he will break Lucifer's will and reduce him to an attack dog. Unsurprisingly, this backfires horribly.
  • Ultra Series
    • Yapool in the Ultraman Mebius film, Mebius & the Ultra Brothers. Once Alien Nackle (Who was part of a group of aliens with the same goal until the rest were killed by Mebius) succeeded in releasing him... Yapool kills him shortly after, having no need for him anymore.
    • Seen again the Ultra Galaxy Mega Monster Battle 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. Belial however kills Zarab shortly after, not wanting to form an alliance with anyone..
  • Buffy the Vampire Slayer:
    • Ineffectual Sympathetic Villains Andrew and Jonathan 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 monster 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.
    • In season 4, Professor Walsh creates Adam, a Frankenstein-esque human/demon/cyborg creature intended to be the Super Prototype for an army of similar Super Soldiers. Within minutes of activation, Adam kills her himself and ultimately seizes control of Walsh's plans.
    • Dawn may have done this when she attempted to bring Joyce back from the dead. Since the spell was broken before we saw the results in full, we will never know for sure.
    • Anya's dealings with D'Hoffryn after she becomes a demon again - he didn't like her simply coming and going as she pleased.
  • In the first two series of GARO, the Big Bad falls victim to this trope. 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 Breaking Bad: Not only has it turned Walt into a sociopath, but his family is now under constant threat of assassination from the cartels.
  • A demon in Charmed freed the Titans in order to take control of the Underworld. He doesn't even finish his Motive Rant before they kill him out of annoyance.
  • Played with in the Post-Script Episodes of Kamen Rider Wizard. Wizard gets drawn into a pocket dimension ruled by Amadam, who can control the various sources of evil power in Kamen Rider. Amadam also claims that the Kamen Riders themselves are "evil" (horrible at being evil, but "evil" nonetheless) since they're all Phlebotinum Rebels that share their powers with their enemies. Unfortunately for him, once he gets the means to summon past Riders, he finds that the summoning did not give him control over them and they promptly turn on him because he's the bad guy threatening innocents. The principle that Evil is Not a Toy still holds even when that Evil fights for Good.
  • Kamen Rider Ex-Aid:
    • Kiriya Kujo failed to see that he can blackmail Kuroto Dan only because the latter still needs him. When he crosses the line one last time, Kuroto gives him a Game Over.
    • A bit of Black Comedy comes in after Kuroto falls for the same thing. He never thought that mistreating his partner-in-crime could derail his plans in any way. Unfortunately, said accomplice happened to be Parado, the de facto leader of Bugsters, who proves him wrong by killing him.
  • Agents of S.H.I.E.L.D. reveals during the third season that HYDRA is in fact an ancient cult dedicated to the worship of an evil, body surfing Inhuman known as Hive. Gideon Malick, one of the main antagonists of the season and HYDRA's modern leader, has spent his whole life trying to find a way to free Hive from his imprisonment through a wormhole; after half a season, he succeeds, only for Hive to quickly usurp control of HYDRA from him, ultimately culminating in killing Malick's daughter in front of him to make a point, and then killing him to prevent him squealing to S.H.I.E.L.D. in retaliation.

  • 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 entire 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.


    Mythology and Religion 
  • The Ars Goetia includes instructions for making sure that conjured demons don't show up in Eldritch Abomination form, but as 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.

  • Big Finish Doctor Who has this happen to the Meddling Monk. He forms an alliance with the 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.

    Tabletop Games 
  • Dungeons & Dragons:
    • The sourcebook "Elder Evils" features several evils sealed in cans. One of these, Pandorym, is so alien it might as well add another axis to the alignment diagrams. Plus it's angry. Good luck controlling that.
    • The Inevitable trying to release Pandorym isn't doing so for its own benefit, though. It just 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 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. 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 worse.
  • In any RPG based on the Cthulhu Mythos, 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.
  • 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 Killed Off for Real, with a message from the mysterious Avinaar explaining that he unsealed this evil just to have a worthy foe - and it was too weak, anyway. Cue panic.
  • More than a few denizens of Warhammer 40,000 have made the stunningly catastrophic mistake of treating Chaos or something devised by the Necrons like this.
  • A website referenced a Vampire: The Masquerade game where evil cultists wanted to revive and enslave Caine, the first vampire, while the 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: Caine 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.
    • The Baali are a bloodline traditionally in service to various cosmic horrors and demons, calling on them for power. The Black Hand: A Guide to the Tal'Mahe'Ra introduces a Baali faction out to stop the rest of their bloodline, along with any other infernalists they come across, before they do something idiotic in dealing with these forces and break the world.
  • In 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 Magic: The Gathering, 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 Lord of the Pit and Archdemon of Greed demand regular sacrifices from their summoners and attack them if they are denied. Bloodgift Demon and 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. 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. Rakdos the Defiler is so hard to control that he is just as dangerous to his summoner as he is to the opponent.
  • The Dark Eye has the story of mage-emperor Fran-Horas who, in order to put down a particularly troublesome revolt against his rule, summoned the 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 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 Mummy: The Curse, 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 fulfill 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...

    Video Games 
  • In Undertale, both Flowey and Frisk get this in the Genocide Run. Flowey doesn't realize that Chara doesn't care about them until just before the end, at which point he makes a failed attempt to warn Asgore and then an equally unsuccessful attempt to convince Chara he never betrayed them. After the completion of the run, the player sells their soul to recreate the world, which leads to Chara killing your friends in any future pacifist run.
  • When the Sonic the Hedgehog series got into more complex plots, Dr. Eggman got into the notable habit of doing this.
    • In Sonic Adventure, Dr. Eggman releases Chaos and feeds it Chaos Emeralds. It obeys him for a while, but eventually turns on him.
    • Also, Eggman releasing Shadow the Hedgehog from his suspended animation in a military base in Sonic Adventure 2.
    • Dark Gaia was released from his can (which was the planet, no less) within the first few seconds of Sonic Unleashed, only to break apart and be of no use to anyone, at first. Yet when fully restored, Dark Gaia immediately sends Eggman flying when he tries to control it.
    • In Sonic Generations, Eggman averts this, as he takes control of a time-erasing creature by mechanizing it and it never turns on him.
    • In Sonic Lost World, it actually happens to him early in the game when he attempted to harness the Deadly Six's power. It was caused by Sonic himself disposing of the Restraining Bolt Eggman was using to control the Six without even bothering to find out what it was.
  • Vampire: The Masquerade – Bloodlines played with this quite epically: sealed evil is just a good bunch of TNT, but hey, works just as good!
  • Tales of Phantasia: Mars 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. Well, that's the second; the first thing is to reveal that he himself had manipulated Mars to unseal him.
  • Return to Castle Wolfenstein: 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.
  • Every time someone stumbles on Filth in The Secret World they will try to harness it, only to be turned into mindless Ax-Crazy Humanoid Abomination or enslaved by Dreamers and trapped in their delusions. Apparently, their whispers are very persuasive.
    • Slightly subverted for Powers That Be, but played straight for everyone surrounding them: Lilith has wards that are effective against Filth, but each of her tries has gone wrong, with the latest bringing The End of the World as We Know It to previous iteration of reality.
      • Played straight with her attempts in creating The Cult: puppet leader goes rogue and associates directly with Dreamers, trying to assassinate her in the process.
      • Subverted somewhat with The Host - even though they originally harnessed Dreamers' power to create Earth in first place and know, how to control it, they understand dangers. Grigori are opposed to touching Dreamers at all, while Nephelim want to wake them with all precautions and full control.
      • Well, Lilith already tried it.
    • So far averted with Philip Marquard: while he's working on releasing Dreamers, he's not planning to control them, he only wants to throw the world in their maws and join them at the feast. Judging by John's transformation, he actually has a good chance.
  • Mortal Kombat:
    • An odd case of this happens in Mortal Kombat: Deception; Big Bad 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 Big Bad, 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 idiots.
    • Mortal Kombat X: In Jason Voorhees' arcade ending, the revenant menace of Friday the 13th catches the attention of the Netherrealm's new ruler, Liu Kang. He offered Jason a plentiful bounty of victims in exchange for his fealty. Jason's response? He doesn't like this arrangement, and simply disembowels Liu Kang and strangles him with his own innards, as Jason's loyalty lies only with one person: his own mother.
  • In Gunstar Heroes The 4 Treasure Gems fry General Gray after completing the Boss Rush and reveal the real final boss.
  • This is a recurring theme in Kingdom Hearts.
    • Riku gives himself over to the Darkness at the very beginning of the game, thinking it's an easy way off his world and into the adventure he craves. It ends up separating him from his friends, destroying his homeworld, and apparently devouring the heart of the girl he and his best friend like. Oh, and it also 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 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 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 (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 Light within Kingdom Hearts proves to be his undoing. Oops again.
    • Strangely enough, played straight by Maleficent, of all people. She is shown warning the other Disney villains about relying too heavily on the power of Darkness, pointing out how many have fallen to it and lost themselves. While she does eventually get overtaken herself, she had to be forced into it by Ansem. Apparently being the "Mistress of all Evil" means one has an understanding of how dangerous Evil can be even to oneself.
    • 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 Big Bad and defeats him with it 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 Xehanort to take control of Terra's body. Evil Is Not A Toy or in this case something that can be used without consequence kids!
      • While Dark Is Not Evil, Evil is still not a toy, and neither is darkness. It is possible to control the Darkness (Riku finally managed it in his story in game 2) but it is NOT something to take lightly. 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 is Ventus's Superpowered Evil Side which was extracted from Ventus's heart and body by Master Xehanort. At the end of Birth By Sleep, he possesses an unlimited army of evil underlings and a nigh omnipotent weapon capable of bending reality and plunging the worlds into neverending war. This is especially distressing because 1) he's a maniac and 2) earlier in the game he showed no remorse over disobeying 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 MMORPG City of Heroes. 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 Paper Mario: The Thousand-Year Door, the Shadow Queen blows Grodus up after he commands her after freeing her. This all happened because 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 actually a new ability. This is actually intentional on the part of the "evil" beings, who were the former heroes who sealed the Shadow Queen.
  • In Mario & Luigi: Bowser's Inside Story, Fawful attempts to harness the Dark Star, a being of raw evil, to gain ultimate power, but it overpowers him to become the real final boss.
  • In Mario & Luigi: Dream Team Bowser and Antasma (a being of Nightmare) team up. You can see where this is going... but not quite the way you might expect. Bowser turns out to be the evil that isn't a toy and betrays Antasma, even mocking Antasma for thinking it might be the other way around.
  • Double Subversion in Wild ARMs and the Alter Code F remake. The Sealed Evil in a Can, 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 Not Quite Dead; she possesses the leader of the Demons, thus fulfilling the trope.
  • The arcade game House of the Dead reaches its climax as the Big Bad Doctor Curien unleashes his most powerful creation, Magician Type 0, and commands it to attack the main characters. Within minutes, the Magician kills the Doctor.
  • Resident Evil:
    • Subversion; at the end of the first game 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 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 only competent Umbrella employee in the whole series. Guess how it ends.
  • In Chrono Trigger it's a common belief that Magus attempts to awaken Lavos to play with it before being foiled by the heroes. 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 was 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 Chrono Trigger we have a highly magical floating city of Zeal, whose ruler tries to harness the power of the world-destroying Lavos. As a result the queen goes insane and the city comes crashing down when Lavos gets angry.
  • In the LucasArts adventure game Loom, the head of the Guild of Clerics makes ominous plans to rule the world with an army of the dead. As soon as he opens a portal to the world of the dead, its ruler Chaos floats through and kills him in a rather gruesome manner. Chaos then proceeds to take over the world by himself.
  • Everyone who uses the Emigre Manuscript in Shadow Hearts assumes that, unlike the poor bastards before them, they'll be able to hold it together long enough to bring their loved ones Back from the Dead. They usually end up a statistic. The only time it works properly, it requires a Heroic Sacrifice and still produces an Eldritch Abomination.
  • Fire Emblem; repeatedly. Spoilers ahoy!
    • Fire Emblem 7's Big Bad Nergal fully devoted himself to the dark arts in order to rescue his wife. Said dark arts consumed his free will and caused him to forget why he wanted power in the first place.
    • In Sacred Stones, 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.
    • In 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.
    • Averted in Radiant Dawn. 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: 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 World of Warcraft 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 Blood God 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 the players manage to break the chains binding Hakkar the god obliterates his treacherous servant immediately.
    • Demon hunters use demonic powers against them, and have to constantly fight back the demons' influence over them. If they fail (as often happens to non-important NPCs), they either explode or become complete demons themselves.
  • Neverwinter Nights: Hordes of the Underdark has a drow queen bind one of the nine lords of Baator. This does not end well. Baator is Fire and Brimstone Hell. Don't mess with the entities living there.
  • Averted in Soul Nomad & the World Eaters, thanks to proper estimation of the threat involved and planning how to deal with it. Layna manipulates the main character into awakening the Omnicidal Maniac Gig who sleeps inside an Artifact of Doom, and then shields him/her from the ensuing Demonic Possession. This forces Gig into co-inhabiting the protagonist's body, producing a fused being possessing the power needed to Save the World. In short, it works.
    • ...Except for in the Demon Path, in which it turns out that the protagonist isn't a very nice person and immediately goes on a genocidal rampage with Gig's powers, starting with her.
    • Played straight in the normal path anyway, in an unrelated incident. Put short, controlling a World Eater is unfathomably stupid. 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... OM NOM NOM.
    Gig: If you want to know why they're called World Eaters, well... there you go.
  • Averted in Knights of the Old Republic. Darth Revan unearthed an ancient Artifact of Doom 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 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. 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 smart enough to send a pretty Light-side woman along...
  • Pokémon Ranger: Shadows of Almia: The Big Bad unleashes the legendary Dark Pokémon Darkrai, and tries to sic it on the hero after cranking up the energy of his Incredible Machine beyond its limits to Level "Dark". Darkrai then goes berserk and swallows him and his sycophantic henchman inside a Dark Void.
    • Also, in Pokémon Ruby and Sapphire/Emerald, this is the end result of Team Aqua's/Team Magma's, uh... misguided ecoterrorism plot.
  • Chzo Mythos has the druid Cabadath, who intends to open a portal to Another Dimension in order to take control over Chzo, an Eldritch Abomination and a god of pain, and have him fight the invading roman forces. He fails miserably, and is subjected to an eternity of horrible torture. He is subsequently turned into The Tall Man, a sort of Dragon, and is used in a similar fashion by other minor villains.
  • Dragon Ball Xenoverse: During the Beerus Saga, Demigra attempts to use his Black Magic to take control of Beerus. It initially appears he's succeeded, with Demigra even taking the time to indulge in some Evil Gloating ... but as it turns out, Beerus was only faking it in order to draw Demigra out of hiding, and subsequently helps the Future Warrior fight him off, all while lampshading how stupid Demigra was to think he could use him for his plans.
    Beerus: Trying to control me? That's blasphemous.
  • Iji is a rare case of the protagonists doing this: after the planet is devastated by an alien invasion, they try calling in another group of aliens they heard was opposed to the first. Turns out that the first aliens just wanted somewhere to hide and regroup. The other ones are out to conquer the universe, one Earth-Shattering Kaboom at a time.
  • Dark Forces Saga of the Star Wars games have it as a recurring trope - you get a "We Can Rule Together" proposal and either decline it or reply "I Can Rule Alone"
    • In the Dark Side path in 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.
    • In Jedi Academy, Tavion has it bad. In the Dark Side route it goes the same way Kyle's Dark Side did - you slaughter both Jedi and Sith on your way to Tavion, kill her, claim her artefact and take over the Empire remnant after evading Katarn. In the Light Side, the ghost of Marka Ragnos whom she was trying to resurrect carelessly possesses her and puppets her body as a last ditch effort to fight you off.
    • And in a smaller example, one mission starts with the bad guys releasing an 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 Chancellor Cole in The Legend of Zelda: Spirit Tracks. During the final battle, 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, hijacking his body to transform into his final form.
    • This also happens to Byrne, The Dragon 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 Heel–Face Turn. Cole even mocks this.
    • It also happens in The Legend of Zelda: A Link Between Worlds. Hilda thinks she can use Yuga to revive Ganon and rebuild Lorule with the power of the Triforce... She's very wrong. Yuga had his own plans for world conquest, and turns on her with the help of Ganon's power.
    • Subverted in the backstory for The Legend of Zelda: Majora's Mask; an ancient tribe did use the titular mask for curses and hexes, right up until they realized exactly what they were "playing" with. Played straight with the Skull Kid from the same game, who stole the mask from the Happy Mask Salesman without really understanding what it was, and used it as a tool to play sadistic pranks right up until it betrays him at the end. In fact, the mask was influencing Skull Kid's mind from the very beginning, twisting his playful nature into cruelty.
  • In Dragon Quest VI, about halfway through the game, a kingdom summons a powerful demon named Nokturnus in the hopes of destroying Big Bad 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 Final Fantasy V the Big Bad 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 his tree form in the game's final dungeon, he loses control of the Void and it possesses him, which for you is also bad (the form Voided Exdeath takes, Neo-Exdeath, is the Final Boss of the game and an Omnicidal Maniac who wants to destroy all of existence, and then himself).
  • In Final Fantasy VII, Jenova was excavated by Shinra and used in genetic experiments to create Super Soldiers. Of course, using a poorly understood Cosmic Horror in unethical human experiments turns out really badly. Most of the SOLDIERS (including the top three) go mad and Turned Against Their Masters. The cumulation of this is Sephiroth whose hatred and will combined with Jenova's destructive instincts and power lead to the destruction of ShinRa and the near destruction of the Planet. Although Hojo, at least, was so crazy that he probably intended all this to happen from the start; he certainly isn't upset when it happens.
  • Shadow of the Colossus: At the beginning, Dormin clearly tells Wander that resurrecting Mono will have unpleasant consequences. But played with in that Dormin does keep Their promise, and it's ambiguous whether or not They're evil.
  • BlazBlue: During his training, Jubei constantly reminds Ragna that the power of the Azure Grimoire is not truly his power, and that it will never truly be under his control. As the creator of the Azure Grimoire(s), both of them, Yuuki Terumi seems to think he can easily control the power of the Azure. It backfires when Lambda performs her Heroic Sacrifice, 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 and uploads a virus that freezes Takamagahara, the reality warping supercomputer that held his leash. Granted, this did come at the cost of his monopoly over the Azure's power and Mu-12.
    • This trope also applies to 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 the Boundary, he could come up with something beneficial to humanity, even if it costs the lives of many people. Even his Mad Scientist mentor Kokonoe did not approve, and the result of that is that he gains nothing, and the Boundary corrupts him into 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 dabble with another Evil: NOL and Hazama, aka Yuuki Terumi. It's still unclear which one is Eviler Than Thou in this case: Boundary corruption or NOL/Hazama. Lotte at least managed to learn his lesson 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, who tried and failed to kill Kazuma Kvar before Terumi could merge with him. When the 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 and in irony's sake, she would get turned into Phantom, practically Terumi's slave.
      • To be fair to Nine, 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.
    • 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, you don't fuck with a god.
  • Saren Arterius in Mass Effect finds Sovereign's mind-control powers quite useful in acquiring minions, but has the foresight to set up a research lab to find out how it really works. He's Properly Paranoid, because Sovereign is also influencing him.
    • Researching the rachni, the krogans, the geth or AI in general has a tendency to backfire spectacularly, even if none of them are evil per se.
    • In Mass Effect 3, The Illusive Man attempts to take control of the Reapers. But as much of a Magnificent Bastard as he is, he was still out of his league there and ends up indoctrinated.
    • 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. There's a reason the Reapers leave tech all over the galaxy.
    • According to Vendetta, there is evidence of certain patterns manifest and repeat in every previous Cycle of Reaping, suggesting that renegade groups rise up to try this plan - only to fail miserably, get Indoctrinated, and hamper everyone else's efforts - Every. Single. Time!
  • In Dragon Age II 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 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. This is actually a fair bit of an averted trope however as Merrill is actually immensely aware of the risks- which is why she brings Hawke and co with her to speak to the demon just in case she becomes possessed so they could put her down. Marethari however intervened and became possessed instead- as Merrill said, it was her mistake to make, not Marethari's, and Merrill actually took capable backup in case things went wrong and she needed to be dealt with. So Marethari's sacrifice was completely avoidable if she'd just let Merrill go along with her plan. It's just everyone criticizes Merrill but ignore the fact she's actually VERY aware the demon is dangerous.. 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 Dragon Age: Origins – Awakening, the expansion to the original game, it is revealed that (weapons-grade 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!
    • In Dragon Age: Inquisition, after being inadvertently blasted forward in time by a misfired spell cast by a member of a violent nationalist Tevinter cult, Dorian notes the tendency in Tevinter to completely fail to grasp this trope.
    Dorian: It's the same old tune. [mocking] "Let's play with magic we don't understand, it will make us incredibly powerful!" [serious] Evidently, it doesn't matter if you rip apart the fabric of time in the process.
  • Shin Megami Tensei has a very simple law of magic-you can attain ludicrous amounts of power by taking demonic (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.
    • In an early chapter of Shin Megami Tensei II, 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...
  • Arc the Lad gets a moment of this when the King of a country that has been manipulated by demons willingly sets free the Big Bad and gets as far to say 'My first act shall be...' before he is vaporized for 'Serving his purpose'.
  • Dead Rising 2: Any Mega Corp. that thinks using zombies to further some goal is a good idea is asking for trouble, but the folks behind Terror Is Reality deserve mention for keeping an army of zombies around for a gameshow. Naturally they escape and destroy Fortune City.
  • The Wish spell in Dominions can be used to summon any unit you can think of. But if you summon a 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 Kid Icarus: Uprising was revealed to be part of Pyrrhon's plan to take control of the aforementioned Borg expies. It goes as well as you'd think. Notable in that Pyrrhon himself is a god, albeit a minor and not very respected one.
  • Quest for Glory IV brings us Katrina, a deeply lonely and incredibly powerful vampire and sorceress who desires to unleash a Cthulhuesque Eldritch Abomination 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 Ad Avis while the Hero subsequently banishes the Dark One back to where it came from. However based on the Non-Standard Game Over message if the Dark One is released, it probably would not have ended well for anyone.
  • Homeworld Cataclysm has The Remnant of the once-powerful Taiidani Empire team up with an extra-galactic viral entity called 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 Yu-Gi-Oh! The Duelists Of The Roses, 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 StarCraft:
    • Confederacy believed the Zerg were just animals and that it was a good idea to use them as a weapon by putting Psi Emmiters that would attract them on any planet they wanted. They were wrong. And they learnt it the hard way.
    • The main reason why the Confederacy was unable to control the Zerg was that Arcturus Mengsk stole the Zerg-controlling technology and turned it against the Confederacy; but notably, Mengsk himself didn't have to deal with his pets running amok, probably because he knew about this and never tried to use the Zerg again after the fall of Tarsonis. Nonetheless, the fact that he used the Zerg on Tarsonis and particularly that he abandoned Kerrigan there hit him pretty hard in Brood War and even harder in Starcraft II.
    • UED admiral Gerard Dugalle acknowledged this in his final message to his wife. "The creatures we were sent here to tame are untameable" indeed.
  • In StarCraft II: Heart of the Swarm:
    • This is directly invoked by the protagonist. After curing Sarah Kerrigan from her Viral Transformation in Wings of Liberty, Valerian Mengsk finds out she still has some Zerg mutagen inside her, and asks her to control Zerg Drones 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.
    • Furthermore, Mengsk has been creating a Hybrid army to use against the Protoss and Zerg. He thinks he can control them; Stukov (who had previously tried to help the UED control the Zerg) is less optimistic.
    • Then finally in StarCraft II: Legacy of the Void, the Moebius Foundation was also breeding hybrid, which turned them into a Psycho for Hire army. Alarak even comments how frequent this is within the Terrans.
    Alarak: You wander too close to a black hole, and it'll crush you.
  • There's only one Mega Man (Classic) game where Dr. Wily is a final boss, but fails to be the final one: Mega Man V for Game Boy, in which he pulls his usual 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).
  • In chapter 5 of Baldur's Gate II, 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.
    • You then have the option of making the sacrifice yourself if you want to. If you pick the right dialogue option you'll get a cool weapon, pick one of several wrong options and you'll get incinerated. Most walkthrough guides recommend keeping your stupid mouth shut.
  • Summoning demons or Sleeping Ones in Conquest Of Elysium 2 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 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 Omnicidal Maniac, fulfilled the exact letter of the bargain by destroying Eldred's entire world. Eldred flees to the world the game is set in, and is dismayed to find that Marduk arrives there not far behind him (one of the local gods had the same idea he did). Marduk himself says there's enough idiots willing to summon him that he has destroyed countless worlds.
  • In Grand Theft Auto V the protagonists themselves are this: a gang banger wanting to become a more professional criminal, a retired bank robber who had been one of the most wanted men in America and an unhinged maniac. And a corrupt government agent and an extremely sleazy billionaire use them for their purpose, and then make every attempt possible to screw them. 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.
  • The artificial moon Dalamud in Final Fantasy XIV TWICE. Built by the Allagan Empire as a giant solar collector using an imprisoned Bahamut, it caused cataclysmic earthquakes destroying their Civilization. Later the Garlean Empire decides it will be a good idea to cast Meteor and call Dalamud down to destroy the Three Kingdoms not knowing that it's artificial or that it contains Bahamut. It broke open in the atmosphere and released Bahamut wiping out both battling armies and causing a massive reshaping for a good section of the world. Moral of the story: don't try to use the power of what is essentially an elemental god weather you know it's there or not.
  • In Dark Cloud, Colonel Flagg releases the Dark Genie from the Urn. The genie proceeds to eat the leader of the Curse Dancers simply because he was hungry. When the genie is defeated, it turns out to be just a mouse that was sealed into the Urn with the true Dark Genie and managed to absorb some of its power. The real Dark Genie has long since possessed Flagg and kills him the second his body begins to falter.
  • In Gauntlet Legends, the wizard Garm summons the demon Skorne in a bid to outdo his brother Sumner. The demon quickly overpowers Garm and has him chained up and tortured for his amusement. Subverted in the expansion Dark Legacy after the heroes defeat Skorne. Garm uses the last of his strength to merge with the pieces of the fallen demon and is reborn as an even more powerful monster that serves as the true final boss.
  • Anyone trying to harvest Metroids is usually unlucky enough to find out that they are untameable. This is particularly evident in the first Metroid Prime where the Space Pirates have Metroid stasis tanks and then Samus cuts the power and they run amok and sap the life force of their researchers. Metroids aren't all bad, though, since Metroid: Fusion reveals that the Chozo had cultivated the creatures in order to prey on the X Parasites, which are even less friendly to organic life. And the Federation tries to weaponize both over the course of the game (so far nothing bad has happened with their attempts but Samus blows up the space station she's on in order to destroy everything on it because the Federation don't seem to get the message that they're messing with something they can't control).
    • Also during the Metroid Prime Trilogy there's Phazon, the highly radioactive substance that can corrupt anyone who comes in contact with it. The Space Pirates see it as a power source while Samus just wants to get away from the stuff as it ruins planets. By Metroid Prime 3: Corruption, it's been forced on her by Dark Samus so she makes the best of a bad situation by channeling its power through a special suit that can use Phazon that her body produces, though heavy reliance on it also has potentially lethal effects. At the end of the game she manages to destroy all of the Phazon in the galaxy by destroying its source.
  • The Elder Scrolls has a number of rules and guidelines for Daedra summoning that are designed to prevent this (at least in story; it's less of a problem for the player). One in-universe book, for example, tells the story of a boy who summons a Dremora to practice his Conjuration. The Dremora says the boy will need a soul gem to advance further, and hey! He just happens to have one on him that the boy can use. The boy accepts the soul gem... and the Dremora demonstrates how to use it by tearing the kid's heart out and trapping him in the gem. The book ends with the moral that you never accept a freely given gift from a summoned Daedra, because this breaks the magical bond that keeps them from killing you.
  • Kingdoms of Amalur: Reckoning: The Big Bad wants to bring a Dragon God back to life in hopes of being her main servant. He succeeds only for the Dragon God to reward him with death.
  • Minecraft: Story Mode: Ivor planned to show everyone that Gabriel was a loser by summoning a controllable Wither and making it fight him. Unfortunately for him, slapping a Command Block into a Wither assembly does not make a controllable Wither, but a Wither that can control the landscape around it and assimilate it into itself, giving birth to the Wither Storm.
  • Dragon Quest VI: You can visit the ruins of Graceskull Castle, and later see why it's in ruins. The king hit on the bright idea of summoning a giant demon to beat the Archfiend, the game's Big Bad. Astoundingly enough, this fails and results in the destruction of the castle. As it turns out, the demon they summoned is the game's Bonus Boss. If you're sufficiently overleveled and can beat it in a few turns, the demon acknowledges your strength and cheerfully curb stomps the Big Bad for you.
  • Killer Instinct 2013: In Season 3, Kan-Ra comes across the corpse of Gargos' old rival Eyedol and uses necromancy to bring him back to live, planning to use him as a weapon against Gargos. The minute Eyedol stands up, he attacks Kan-Ra before going to pursue Gargos for revenge.
  • In Stellaris, if your empire is taking the Psionic Ascension path, then one event has an entity contact your leaders through the Shroud and offer you a deal: a long list of unbelievable bonuses to your empire that last fifty years and would make you an unbeatable Game-Breaker, "if we will only bring forth the end". It's not made explicit what that means, but the bold red text next to it saying "DO NOT DO THIS" implies nothing good. You may think you can fight it with your massive fleet, just like you can the various other forces in the galaxy that are trying to kill you. Nope. After the fifty years are up, it's over. Every ship, every base, every planet you control is immediately destroyed by an Eldritch Abomination that spawns in the center of your empire, save for a few refugees led by a scientist who saw it all coming and organized an emergency expedition to an uninhabited planet at the far edge of the galaxy out of this thing's reach. Worse, said Eldritch Abomination now seeks to scour the galaxy of life, saving your little refugee colony for last, and you'll get no help from the other empires given that you now have a -1000 diplomatic penalty with all of them for dooming them all; even if they somehow manage to beat that thing back, they'll be coming for you next just for revenge. When it says it will bring forth the end, it means it.

    Web Comics 
  • In 8-Bit Theater, Black Mage tries to control unstoppable forces of evil whenever possible, usually causing a double-subversion or whatever might be hilarious. He takes control of an accidentally summoned Eldritch Abomination—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: Sarda absorbs Black Mage's super-evilness, which seems to work fine, until he explodes and turns into Chaos. And Black Mage immediately tries to control him.
  • Angel Moxie, 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 and punched Vashi so hard she landed in China, before joining the good guys.
  • Girl Genius. Zola releases and tries to help The Other. One Gilligan Cut later and she's hog-tied and an unwilling test subject for another fine display of Mad Science.
  • A Modest Destiny: The villain Gilbert raises Deo-Deo from the dead, in exchange for immortality. However...
  • Vaarsuvius in The Order of the Stick makes a Deal with the Devil and actually does get huge amounts of power temporarily. Having accomplished a couple hits against evil, s/he's now DePowered 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. 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.
    • And on top of it all, his/her mate filed for divorce.
    • Xykon also believes (and this is whole plan) that he will be able to control the Snarl. Instead, he'll just unleash a god-destroying monstrosity that has no idea of control at all. 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 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 Sinfest, 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 Sluggy Freelance, 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 Cucumber Quest, the summoned Nightmare Knight reminds Cordelia that he's not her servant.
  • Sonic the Comic – Online!: In issue 266, Dexter Bagstille captures Sonic, planning to harness Super Sonic to end the war with Robotnik once and for all, using a special Chaos Containment Collar to keep him under control. It initially seems to work... but when the Omni-Viewer and Team Chaotix arrive on the scene, Super immediately attacks Omni and drains his power before going on a rampage, all while mocking Dexter for thinking his plan would work. Once Super is dealt with two issues later, Dexter is put on trial and convicted for his stupidity. Sonic even lampshades how stupid Dexter is to think his plan will work, pointing out that everyone who has tried to control Super Sonic has failed.

    Web Original 
  • In Hitherby Dragons:
    “This is the work of the Fisher-Price Ultimate line,” says the talking learn-the-alphabet game.
    The sky swirls and there is an impression of death and sorrow.
    “In their laboratories they built a child’s toy prototype for ultimate evil—a toddler’s first ultimate evil, as it were. The final product would have had safeties, seals, restrictions.”
    Susan sees the direction of this speech.
    “But not,” she says, “the prototype?”
  • In The Gamer's Alliance, a greedy mage uses an ancient spell in the Second Age to release the imprisoned demon lord Yurius in order to use him for his bid for power over the kingdom. Yurius immediately kills him for his troubles.
  • SCP Foundation: Incident 668-682, where a disgruntled agent (subsequently referred to as "the Victim") tries to smuggle a weapon to Omnicidal Maniac SCP-682.
  • For most of Red vs. Blue: 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. At the end of the series, he captures the AI Tex to return his lost powers, and promptly returns to being the Ax-Crazy Implacable Man he was in Reconstruction.
  • In Prolecto, it's subverted big time. Sonya, knowing Azazel was not a toy, took appropriate precautions, and through the majority of the book controls Azazel perfectly.
  • In Twig, Reverend Mauer attempts to provoke his enemies into overreacting by creating primordial life (life which can rapidly modify itself) and then publicizing the resulting atrocities. Unfortunately, the primordials don't particularly like being used up and discarded, and so release a final, spiteful curse upon humanity before their destruction.
  • Defied by OP in the Elfslayer Chronicles. The DM tosses the Eye of Blight, a sentient magical artifact, in his way, and he promptly buries it and has nothing more to do with it for the rest of the campaign. He's smart enough to know that a sentient evil artifact called the Eye of Blight is something that cannot be good news for anyone, especially the wielder.
  • In Ruby Quest, the Metal Glen tries to use a mysterious substance found (along with multiple creepy artifacts like a dummy that rotates on its own so it's always staring at you) in a room buried under the ocean as a cure-all. It did not turn out well. The substance (heavily implied to be the flesh of an Eldritch Abomination) corrupted all who took it, twisting it into the horrific place that it is at the beginning of the quest.

    Web Video 
  • Part of the shared backstory of Tribe Twelve, Dark Harvest, and Everyman HYBRID is that the Nazis, and later American scientists working with ex-Nazi scientists, attempted to recreate the ancient rite of Gorr'Rylaehotep (a.k.a., Slenderman).

    Western Animation 
  • Justice League:
    • 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): 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 Sorceress Tala as a conduit to revive him, a process which will kill her. Unfortunately for Lex, said area was also the gravesite of Physical God and Galactic Conqueror Darkseid, and you get no points for guessing which one of the two Tala ends up reviving as a final 'gift' to the man who killed her.
  • Aladdin: The Series: In the bulk of his appearances, Abis Mal is shown tracking down various magical beings and artifacts, hoping to use them to conquer Agrabah. Inevitably, the being/artifact in question will turn on him, forcing Aladdin and co. to step in and save the day, but Abis never learns.
  • Xiaolin Showdown. The spirit of a 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 Face–Heel Turn, 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.
    • A straighter example is Hannibal Bean corrupting Chase Young. He gives him the Lao Mang Long Soup to turn the monk evil. Once he does, Chase Young betrays him and locks him away in Ying Yang World.
  • He-Man and the Masters of the Universe (1983)
    • An episode 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 Captain N: The Game Master centers around Mother Brain's quest to free Ganon (the Big Bad of The Legend of Zelda), so he could help her conquer Videoland. Unfortunately for her, she seriously underestimated his douchebaggery. As Ganon puts it, the only being Ganon serves is Ganon.
  • In Teen Titans, Slade cuts a deal with the demonic Trigon to come Back from the Dead in return for Slade helping the demon take over the world. After Slade fulfills his role, Trigon turns on him. 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 was either destroyed or re-sealed in Hell. 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.
  • Darkwing Duck:
    • 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. Surprisingly, Duckthulu thanked them by disposing them and continuing to destroy all of reality.
  • Dexter's Laboratory: 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 Oh, Crap! 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 Centurions episode "Man or Machine", Mad Scientist Doc Terror recreates an alien Master Computer 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 Teenage Mutant Ninja Turtles (1987) 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 Turtles Forever, when Shredder rescues his counterpart from the 2003 series from imprisonment on an asteroid for the purpose of a Villain Team-Up. Unfortunately, the Darker and Edgier Shredder not only takes control of the Technodrome and Krang's technology, but also decides to wipe out creation himself.
  • In Transformers Prime, 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.
  • Jackie Chan Adventures has the main antagonist, Shendu the Fire Demon, constantly betraying any allies he works with, especially if they're human villains attempting to free him from whatever fate he's trapped in.
  • Batman: The Animated Series:
    • In the episode "Birds of a Feather", 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.
    • There's also the episode "Joker's Wild," in which a casino owner opens a Joker-themed resort, thinking the supervillain will destroy the place out of spite and bring the owner a hefty insurance check. Once the Joker is wise to the con, though, he instead sets his sights on making sure the owner is part of the total loss.
    • And then there's "Mad Love," in which Harley springs the Joker from Arkham, desperately infatuated with him and convinced they'll live out a Bonnie-and-Clyde-esque romance. The feelings aren't exactly mutual, and their relationship quickly turns into a nasty cycle of abuse and betrayal from Joker's end.
  • In Ben 10: Ultimate Alien, Vilgax messes with Diagon's seal in an attempt to claim the demon's power and is promptly mutated and enslaved by it. The "Evil" eventually turns out to be Vilgax.
  • In Scooby-Doo! Mystery Incorporated, Professor Pericles spent the entire series and a good chunk of his backstory trying to 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 My Little Pony: Friendship Is Magic: Celestia decided to release Discord, a Laughably Evil Mad God, so she could put his Reality Warper 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 redeemed beforehand. Fluttershy succeeds by befriending him.
    • Discord himself has to learn this lesson in the Season 4 finale. Celestia has asked him to stop Tirek's rampage; instead the latter manages to appeal to his vanity and convince him that he is now his new special friend and they should rule Equestria together. As soon as Tirek has grown strong enough absorbing the magic of enough ponies, he simply promptly turns around and steals Discord's powers as well.
    • Trixie tracks down the Alicorn Amulet after the Ursa Incident ruined her life to get revenge...except the Amulet is actually an Artifact of Doom that corrupts it's user and drives them insane.
  • In Danny Phantom: Vlad Plasmius attempts to gain enormous power by stealing the Crown of Fire (having already obtained the Ring of Rage). He opens the sarcophagus of Pariah Dark, waking him up. Within minutes, Vlad is beaten, and is forced to team up with Danny to stop him. He falls into the same trap with Vortex after his Restraining Bolt is accidentally destroyed.
  • The Mummy: The Animated Series: In the pilot episode, Colin Weasler uses the Book of the Dead to resurrect Imhotep, believing that he could use the book to control the mummy. Unsurprisingly, Imhotep promptly takes the book back, forcing Weasler to become his Evil Minion in exchange for his life.
  • Averted by Dipper in Gravity Falls. While he is angry at the Northwests for taking advantage of his willingness to get rid of the ghost and sympathizes with the ghost's desire for revenge, he recognizes that the ghost is unstable and doesn't want to risk letting him out of the mirror he sealed him in while his sister is at the party. Unfortunately, the ghost averts Evil Cannot Comprehend Good and appeals to Dipper's better nature by asking him to hold the mirror up so he can see the trees one last time before he is exorcised. When Dipper agrees, the ghost heats the mirror up, causing Dipper to drop and break it.
    • Played straight earlier on in the series where Gideon, trying once more to get a hold of the Mystery Shack, summons a certain triangle shaped Dream Demon to help steal the deed to the Shack. Bill Cipher goes on to become the Big Bad of the series, eventually coercing Gideon into being his (human) Dragon when Bill finally breaks the barriers between his world and reality.
  • In the Looney Tunes cartoon "Dr. Devil and Mr. Hare", Bugs Bunny creates a Frankenstein's Monster-esque creature to protect him from the Tasmanian Devil. The monster beats up Taz, then beats up Bugs right after.
  • The Adventures of Puss in Boots has Uli spend over three seasons trying to summon an Ancient Evil known as the Bloodwolf. Said Bloodwolf wonders why he should be grateful toward Uli for any of this.
  • Non-evil version in Avatar: The Last Airbender when an Earth Kingdom general is trying to find a way for Aang to trigger his Avatar State to fight the Fire Nation. He does so by threatening the lives of Sokka and Katara. Aang's Avatar State is activated... and is looking for the one threatening his friends.
  • Averted in The Legend of Korra. Despite being the personification of chaos and darkness and having a great hatred for humans, Vaatu's arrangement with Unalaq is entirely on the level. He could've betrayed Unalaq during their Fusion Dance and still achieve the result he wanted, but presumably, their mutually beneficial goals kept them on the same page.
  • Teenage Mutant Ninja Turtles (2012): In the Season 5 premiere, Tiger Claw summons the Demodragon Kavaxas, intending to use his power to resurrect the Shredder, who Leo killed in the Season 4 finale, using the Seal of the Ancients, a magical talisman that forces Kavaxas to obey whoever possesses it without question, to keep him in line. Three episodes later, in "End Times," Shredder is successfully resurrected, but he Came Back Wrong as Kavaxas' zombie slave and destroys the Seal of the Ancients, after which it's revealed that Kavaxas was just using Tiger Claw to complete the three tasks he needed to accomplish on Earth in order to bring about The End of the World as We Know It; to slay a strong warrior (Tatsu), to resurrect an evil warrior (Shredder), and to destroy the Seal of the Ancients.