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Ridcully: That would be unethical, Dean.
The Dean: Why? We're the good guys, aren't we?
Ponder Stibbons: Yes, but that rather hinges on doing certain things and not doing others, sir.
Terry Pratchett, The Science of Discworld III: Darwin's Watch

There are two possible cases of this trope:

Bad guys are often exempt from type 2 because, well, they're bad guys. Why should a Card-Carrying Villain care about ethics? note 



Type 1:

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     Anime And Manga  
  • Naruto lives off this trope - forbidden techniques are referred to as "kinjutsu" and may be either of the above types.
    • The title character knows two forbidden techniques: The Tajū Kage Bunshin no Jutsu/Mass Shadow Clone Jutsu and the base form of the Rasenshuriken, one of which he uses all the time from episode one onwards. For most people, it would be exhausting or potentially lethal due to the backlash infliced by slain clones, but he gets around it by having much more chakra. To his credit, the second one starts out very dangerous for him due to it dealing microscopic damage to his hand's chakra pathways. But, of course, he finds a way to bypass the dangerous part, because he's frickin' Naruto.
    • There's also Rock Lee, who seems to suffer less and less as he continues to use the Eight Gates.
      • All three cases do have justifications: the Mass Shadow Clone Jutsu Naruto knows seems to have been forbidden by the First Hokage because it'll use up a jonin's chakra in a couple of minutes, combined with the potentially lethal backlash of several clones being killed at once. Since he's a Jinchūriki due to having Kurama sealed inside him, he has a lot of chakra... not to mention his own natural chakra reserves are way above that of a typical jonin. And years of interaction with Kurama's chakra has made them even stronger. The Wind-Style Rasenshuriken got forbidden by Tsunade when, after using it the same way he used a normal Rasengan, it damaged Naruto's arm badly. So he learned to throw it at people instead. Opening the Eight Gates, however, would likely cause less strain on the body the older and stronger you got. Case in point, Guy used six chakra gates and was only as exhausted as pre-time skip Rock Lee was using three.
    • Kakashi was forbidden to use the Raikiri/Lightning Blade by the Fourth Hokage Minato Namikaze as it caused a tunnel-vision effect when used with regular eyes. Since gaining the Sharingan he has overcome this problem. After losing his Sharingan in the finale, Kakashi has developed a new technique to replace it.
    • The Uchiha have developed so many "forbidden" techniques (all based around their Game-Breaker bloodline ability) that it's a wonder they didn't all die out or go blind decades before they were massacred. Funnily enough, Danzo finds a clever way around the one that causes permanent blindness in exchange for the ability to warp reality: implant himself with multiple Sharingan eyes and use up their forbidden power like bullets in a gun...and store away the eyes of all the Uchiha clan members he had murdered as a way to "reload".
    • Filler character Guren uses multiple supposedly-life-sacrificing techniques consecutively while bleeding heavily, without hindering her fighting ability much. She remains alive at the end of her arc.
  • Dragon Ball Z:
    • The Kaio Ken (literally "World King Fist") technique briefly amplifies every aspect of the user's being - from physical strength to sense of taste. Goku is warned that his body may not be able to handle such a surge of power. While he does feel pretty bad the first few times he uses it, later on, he suffers no such effects. By the time he fights Frieza he can stack the technique up to 20x its normal power and doesn't need to even call it anymore. King Kai has to explain to other characters observing the battle that no, he's not holding back he's been using it the whole time. In this case, it is justified, due to Goku's Saiyan biology and the insane training he goes through that takes advantage of it. Breaking limits (thus reducing the forbidden-ness of techniques) is kinda what he does. Also, he only uses the 20x Kaio Ken in short bursts to reduce the negative effects.
      • Goku tried combining the Kaioken stacked to ten with the godly powers of Super Saiyan Blue once and suffered life-threatening injuries. Since then he has been using the combination during Godzilla Thresholds and suffered no injuries beyond a ridiculous drain in stamina - though it is worth noting he doesn't seem to stack it anymore, possibly because of said injuries.
    • There's also Tenshinhan's Kikoho ("Tri-Beam" in the dub). While a tremendously powerful blast for someone of Tien's caliber, it gets its energy by sapping his life force, to the point that he's supposedly risking death every time he uses it. Naturally, it's his signature move and he's often firing it off left and right in standard battles. There are only a few occasions where he actually dies (or comes within a hair's breadth of dying) from using it, and given that Death Is Cheap in the Dragonball universe, this isn't as great a hindrance as one might otherwise assume.
    • Originally the Mafuba (Evil Containment) technique would kill whoever used it. When it's brought back in Dragon Ball Super, this restriction is never mentioned, the implication being that all the characters have become strong/skilled enough to handle it. Even back in the original Dragon Ball, Kami was able to use the Mafuba without being killed.
  • Initially averted in Slayers. Lina's improvised ultimate spell, the Giga Slave, is at least noted as a way to deal with every big bad. However, because of its side effects, great effort is put into not using it because while the spell can destroy anything, it may very well destroy EVERYTHING. It ends up being used only thrice, once before its full ramifications are known (And really wouldn't be much worse than not using it had they known) with a number of additional measures backing it up, and once after an entire season's plot is devoted to driving Lina to cast it by the Monsters, who actively wish to see creation unmade, Lina botching it only to be saved by a literal Deus ex Machina she may have had an inkling of in advance. However, she casts it once again at the end of Slayers Evolution-R, pulling it off flawlessly with zero assistance.
  • Projection in Fate/stay night for Shirou; he keeps doing it and it says that it burns out his nerves and magic circuits and whatnot and yet it never permanently injures or kills him — Shirou himself postulates in "Unlimited Blade Works" that for all its Forbiddenness, the strain of doing it will never be enough to permanently harm him. Averted in Heaven's Feel, when Shirou has to depend on his Deadly Upgrade for Projection instead of doing it himself; the strain gives him brain damage and eventually destroys his body.
  • In One Piece, the main character Luffy has a technique called Gear Second that makes his blood pump faster, increasing his speed and power. In the first arc, this appeared in, it was stated that using the technique wore him out, while also decreasing his lifespan. But by the Impel Down and Marineford arc, he's constantly using the technique, even when he doesn't really need to, with seemingly no side effects at all.
    • The true forbidden aspect of Gear Second only comes from overuse. The technique basically dramatically accelerates Luffy's metabolism so his body overall performs better at the cost of consuming resources faster. In short amounts, it only tires him (he can even quickly recover if there's food for him to eat) but if he uses it to the point of exhaustion, then KEEPS using it, it's like telling an oxygen-deprived person to hold their breath.
    • During the Skypeia arc, one of the characters Wiper had a special weapon that could put out a lot of force, but which also backfired on the user. The weapon could potentially kill a user with one use. Throughout the saga, Wiper uses it three times, and though it injures him, it never takes him long to get back on his feet. Apparently Wiper is just that tough, even by the standards of a world were even the weakest muggles are superhumanly durable.
  • Using the Ginzouishou to its full power is said to be deadly in Sailor Moon, and it does kill Queen Serenity. On the other hand, Usagi uses it about once a season and, despite a few close calls, she always survives none the worse for wear. The very first time it even REVIVES her and the rest of the sailor senshi, with no memory of the events of the season.
  • Singing the Ultimate Song in Senki Zesshou Symphogear is supposed to kill the singer, or at least put her out of commission. By the end of the series, the protagonist trio uses it twice in the same fight.
    • There are reasons for this, though they're not explored in the show. The ultimate song works by increasing the gear's power to levels that are dangerous to the user's body, but a Symphogear user whose compatibility with her gear is high enough can withstand it. Hence Tsubasa (naturally compatible) spends several days in the hospital, Hibiki (fused with her gear) can survive three at once, and Kanade (reliant on Super Serum) completely disintegrates.
  • MÄR has its titular character, Ginta, with his ultimate technique, third ÄRM, Gargoyle which turns Babo into an extremely powerful beast, complete with laser breath. He is warned early on (in a flashback) not to use it heavily, as it is taxing on him. First time he is seen using it, it drains him. Every other time after that, he's flashing it out so many times it's a wonder why he doesn't just start his fights with that and be done with it.
  • In The Rising of the Shield Hero, Naofumi Iwatani regularly uses the power of the Curse Shield without any repercussions despite being repeatedly warned about how dangerous it is. He is shown having to overcome the shield's psychological effect when he unlocks a new tier of power with the shield, but he usually handily succeeds through The Power of Friendship and can then use this tier to no ill effect until comes the Time to Unlock More True Potential. To his credit, he usually at least tries to stick to his normal Stone Wall Support Party Member abilities and only resorts to the Cursed shield when an enemy appears to be unbeatable otherwise.

     Fan Works 
  • A Drop Of Poison: It turns out that dangerous and suicidal techniques can still be very effective tools when you have a nigh-limitless supply of disposable clones to use them for you. Better still, some of them, like a chakra draining technique that damages the coils of the recipient, don't hurt clones at all. With an entire scroll of surprisingly-usable forbidden techniques on hand, Naruto rapidly becomes a powerhouse.
  • The Paragon protagonist of With This Ring develops several techniques that start off dangerous but become commonplace.
    • Accelerated Perception, where the orange light takes the place of neurons, allowing his brain to function faster than normal. At first it makes him nauseous for a while and is automatically stopped by the ring when it reaches the allowable limit of damage to his neural pathways, but as time passes, he stops feeling the negative effects, and uses it habitually when threatened. He does notice this happening, and wonders what it says about him that he's no longer bothered by depending on the orange light for his thinking, but doesn't have any real answers, so shrugs and goes about his business. Much later, a powerful telepath examines him and tells him that not all of his mind is contained in his organic brain any more.
    • Summoning the Ophidian, Embodiment of Avarice, gives him tremendous power, but sends him into a spiral of extreme short-term thinking and inability to feel anything except avarice - the first time. After he recovers from a week of this, his team mates are all understandably leery about ever doing that again. However, it turns out that after the experience he gained, he's able to handle the power properly now, and restrains himself largely to avoid alienating them rather than due to real danger. He continues to communicate with her, let her out of his lantern at times, and even temporarily bond with her when he needs a serious power-up. Eventually the Ophidian is transferred to a new home in the Orange Central Power Battery to supervise the Orange Lantern Corps, so he doesn't have direct access to her any more.

  • Lampshaded in Ghostbusters (1984) when Egon suggests crossing the streams.
    Peter: 'Scuse me Egon, you said crossing the streams was bad...
    • However, in this version, it's not that the dangerous nature of the forbidden technique was overstated or forgotten by the writers - it was weaponized. When you've got an Eldritch Abomination in another dimension, causing the cataclysm you were warned about right in his face, all on the other side of the portal where Earth won't be affected, is a pretty good strategy.

  • In Robert Jordan's The Wheel of Time series there exists a nasty spell called Balefire, which basically erases its target from existence. Retroactively, with Ripple Effect-Proof Memory. The more force you put into the spell, the farther back in time it goes. The heavy strain this spell put on the very fabric of existence was enough to get both sides—light and dark—to silently agree to stop using it long ago. For all its dangers, it can also be extremely useful. Several characters are saved (or revived) from death when their attacker is hit by this, it ignores defenses, and it's a guaranteed way to prevent the Forsaken from reincarnating. In small doses, there aren't any apparent ill effects. It's only with massive blasts that the world seems to momentarily sway to the characters nearby.
    • And then in the last book it becomes painfully obvious why it was forbidden. The Dark One orders his followers to use lots of the stuff, and it does so much damage that the structure of reality itself begins to unravel. Egwene is forced to create a whole new spell called the Flame of Tar Valon to fix the damage, and though it works, using it kills her (though it also kills the bad guys who'd been using balefire at the time).
  • Max Impeller compensator rate in the Honor Harrington series is treated like this. Word of God is that it's a historical artifact from a previous era when going to the maximum rate really wasn't that safe and risked a catastrophic failure of the compensator, which at 500G would turn you to paste. Of course we've never seen a ship have random failure in the entire series (Two short stories involve incidents where the compensator is broken on purpose, once as an assassination technique and once to maximize the damage of a ramming attack) even at max rate as modern designs don't need nearly the same margin for safety.

     Live-Action TV  
  • Star Trek: While not an attack, the Vulcan mind meld is originally set up this way. It can cause irreparable harm to the minds of both people. Nevertheless, it becomes part of Spock's standard tricks throughout the rest of the series and becomes mundane even later. Even in the prequel, it is used by someone who doesn't even know how without even a mention of harmful effects.
    • In Star Trek: Enterprise, however, T'Pol became mentally ill because an improperly done mind meld did damage to her mind, and the mind meld was considered a dangerous and bad technique and Vulcans capable of it shunned because it was done improperly so often that harmful side effects were a common result. So it turns out that the risks never played out in the original series because Spock is just that good. Apparently, It Runs in the Family, as Spock's half-brother is able to mind-meld effortlessly, without even touching the target, and doesn't cause damage despite being insane.
    • In the first-season episode "Arena", Kirk's order to exceed the Enterprise's maximum safe cruising speed is heavily Played for Drama. Similar and higher speeds are used in later episodes with much less concern for the danger. Of course, this could be justified as the maximum "safe" rating being raised because it was proven that Constitution-class starships were able to exceed the current rating without ill effects.
    • In Star Trek: Deep Space Nine we're introduced to an organisation calling itself "Section 31". It claims to have been created at the time of the Federation's founding, in order to act in secrecy to do what the Federation's principles won't allow it to do publicly. It's never made clear whether Section 31 is genuinely part of the Federation, whether the Federation knows about it, whether the intelligence networks of other species like the Tal'Shiar and the Obsidian Order know about them or even if Section 31 is an organisation and not a fancy name used by the one agent we meet who claims to be part of it.
      • Though this is averted in the Expanded Universe (where much of its role and history is established) and the rebooted timeline (where it has not only a headquarters on Earth but is openly discussed between Kirk and an Admiral).
  • In Kamen Rider OOO, each third of the suit has different modes (instead of the entire suit like most riders). The mechanism is too complicated to go into, but using three of a kind is very powerful and very likely to kill you or drive you mad. And usually, Eiji is warned not to, does it anyway, and may faint afterward. He might act more feral for the first few seconds of its use, too. However, by this point, two episodes don't pass without the use of it, and it seems to be no big deal. He later gains another combo which is even more dangerous than the normal ones, but apart from sending him into an Unstoppable Rage the first few times, it follows the same pattern. Repeated use of the ''source'' of this power on the other hand...
    • Especially glaring in Kamen Rider, where such things are often as bad as they're said to be (you really do die if as a normal, unaltered human you use the Dark Kiva or Kaixa powers.)
    • Kamen Rider Zi-O has Geiz Revive. Its time-space powers wreak havoc on the user's body, making it a weapon of last resort after we learn this... for about two episodes. This one season after we lost a major character to a single use of a dangerous mode...

     Western Animation  
  • In Jackie Chan Adventures, Shendu's siblings are horrified when he suggests using the Book of Ages to escape the Netherworld, apparently fearing what could happen if the Book's powers alter the very fabric of reality. Shendu and later the heroes use the Book to their own ends and nothing really goes wrong - Jade and Paco even use it as part of an Argument of Contradictions.

     Video Games  
  • Invoked in Trauma Center: Under the Knife when Doctor Kasal declares Derek's healing touch a Dangerous Forbidden Technique... then in his very next breath admits he's perfectly aware Derek will merrily ignore this if a life is on the line (and as a surgeon, it often is), and explains he's just trying to stop Derek using it as a crutch. (As well as obliquely telling the player it impacts their score.)
  • In the Naruto Shippuden Ultimate Ninja Storm series, the above Naruto entry gets taken Up to Eleven with Ultimate Ninjutsu and Awakening Mode. Naruto can spam the aforementioned Wind Style: Rasenshuriken without showing (or taking, in gameplay) any damage. And that's just the tip of the iceberg. Kyuubi Mode & Cursed Seal Mode? Sure! A forbidden technique which sacrifices your soul to seal the enemy's? As many times as you like! (well, until they die... from the fifth hit with it...). Part one Sasuke using Chidori twenty times in a match? Well, you've got to suck to need that many tries, but two times a day my ass... Mangekyo Sharingan? Nothing more than a wince... The list goes on and on.

Type 2:

     Anime And Manga  
  • In Fullmetal Alchemist, human transmutation is forbidden due to the ethical ramifications. It usually kills you. If not, the Gate/Truth takes part of your body as payment, but it turns out the government forbids it only because they don't want alchemists creating their own armies. Armies of soldiers who are quite literally powered by forsaken children (at least some of them). Specifically, they don't want anybody else using human transmutation to create armies. Transmuting precious metals is forbidden because of the potential damage it can do to the economy.
    • In the 2003 anime version, attempting human transmutation still takes part of your body as payment (unless you have a Philosopher's Stone) but instead creates a homunculus without accomplishing whatever it was you were trying to accomplish.
  • Despite mass-based weaponry being tightly regulated in the Nanoha-verse, in Magical Record Lyrical Nanoha Force, the main characters turn to devices that have mass-based attacks in order to combat the Huckebeins' Anti-Magic abilities.
  • Played for laughs in Ranma ½, where Happosai, after having declared the "Happo Fire Burst" technique illegal and unfit to be used, digs it up again after being ticked off at Ranma and it becomes his main combat technique thereafter. It was only illegal because Happosai decided it was illegal, and he only declared it illegal because he once burned up some stolen lingerie with it by accident.


  • In His Dark Materials: touching someone else's dæmon is given this treatment (sort-of), though admittedly mostly by the villains. In book one, it's treated as a case of "Never, ever, ever. Not even in battle, when trying to kill another soldier, will you touch his dæmon." By the time of book three, the standard seems to have been significantly relaxed - then there's the odd times when a dæmon will initiate contact with another human. In the companion book Once Upon a Time In The North, the villain talks about the number of times he's manhandled other men's dæmons to torture them. However, one could argue that the standards for touching someone else's dæmon have always been at the levels that are shown in book 3, but Lyra, being a child, was just unaware of them. On the other hand, in The Amber Spyglass when Ama uses the tail of her own dæmon to brush a wake-up powder on Lyra's nostrils — why couldn't she have brought her own brush??
    • Given that many some of the incidents in which people touch others' demons have sexual overtones (When a mook touches Lyra's daemon, the phrasing used could have applied to him molesting her just as easily, Will and Lyra touch each other's daemons just before doing... something related to love out in the forest,) this could have some interesting connotations.
    • Considering that Daemons are a part of the person's soul, it's unsurprising that touching someone else's is considered vile.
  • In the Discworld novel Wyrd Sisters, Granny Weatherwax mentions that they can't restore the rightful heir to the throne of Lancre by using magic. Then they have to use quite a lot of magic to get the rightful heir back to Lancre so he can get his own damn throne back (whether he wants it or not). As Nanny Ogg says, "When you break rules, break 'em good and hard."
    • In Witches Abroad, when Magrat again complains about Granny Weatherwax meddling in things she says witches aren't meant to meddle in, Nanny explains it's all down to the difference between the general and the specific. "When Esme uses words like 'everyone' and 'no-one', she ain't including herself." Mind you, earlier in the same book Magrat offered the highly questionable rationalisation "It can't be bad if we're doing it. We're the good ones."
  • There's a subplot in Survivor's Quest where Luke, three years married to Mara Jade and happy about it, is aware of the Jedi's stance against attachment, including love and marriage. One of the reasons he's eager to visit the ruins of the Jedi-headed Outbound Flight is his hope of finding intact, unaltered Jedi records which might, just possibly, have something in them about Jedi who disagreed with this stance.
  • Harry Potter:
    • There is a set of three spells in the books labelled as the "Unforgivable Curses" (Mind Control, Cold-Blooded Torture, and instant death), and they are introduced as so illegal that using one of them, for any reason, is an instant lifetime sentence to Azkaban prison. The fact that the magical government allowed them during the First War is used as a sign that they were becoming He Who Fights Monsters. However, in both the fifth and sixth books Harry tries to the torture spell on people who just killed his loved ones; in the last book he uses the Mind Control just to get out of a dangerous situation, and then uses the torture spell again on a villain just for insulting Professor McGonagall. And she compliments him on it! Though given the change in ministry administration, they may not even be illegal to use anymore...
    • Also prevalent in the movies where villains are frequently vaporised by magic or magically torn to pieces by heroes. But it's all fine so long as nobody uses the "instant painless death" curse. The implication in the books is that while anyone can tear someone limb from limb, the killing curse is inherently evil, as it is fueled by the desire to end a life.
    • Dumbledore and McGonagall have a conversation to this effect in the first book, where Dumbledore claims that "Voldemort has powers I will never have", in response to being called the greatest wizard alive. McGonagall counters that Dumbledore most certainly could use said powers, but since they're inherently evil, he never would.
  • In Guy Gavriel Kay's epic novel Tigana, Alessan enslaves a wizard in order to save the world (or actually, just one country).
  • In Greg Bear's Songs of Earth And Power, Michael is questioning one of the Sidhe, who tells him that none of them eat meat. He asks what they sacrifice to their god, then, and she comes out with "Always forbidden, on occasion mandatory."
  • In The Great Tree Of Avalon, Elli is told by High Priestess Coerria that the Child of the Dark Prophecy may not be as evil as most people believe...but that if Elli comes across him and he really is endangering Avalon, she may have to break their religion's first law.

     Live-Action TV  
  • Star Trek's Prime Directive. It tends to only be mentioned when the captain is about to "bend" it for the greater good. There were, however, a number of episodes (none in the Original Series...) that subverted this, with the captain indeed trying to enforce the Prime Directive in morally... troubling circumstances. The implications were often very disturbing. (Stop a deadly illness that we've got a cure for from wiping out an entire civilization? But that would be playing god! Save a primitive society of millions from a supernova? But we don't want to interfere! Etc.)

    More disturbingly, this also happened in Enterprise when the Prime Directive didn't even exist yet! No rule was forcing him to act this way at all... it came across more like he just didn't want to help anybody and helped derive the Prime Directive as an excuse!

    TOS had at least one episode where Starfleet Command, rather than the captain, explicitly bent the Prime Directive for the greater good (it also had an episode indicating that saving primitive societies from extinction via natural disaster is mandated rather than prohibited by that era's Prime Directive). The ending was changed from actually saving the species to what it became due to Executive Meddling.

     Tabletop Games  
  • There are several rules to Time Travel in Continuum, and one very specific rule is to avoid Frag and fix any encountered. Only a Narcissist would be so vile as to intentionally risk the lives and futures of the universe for their own selfish ends. And then most time combat is about fragging the opponent as fast and as hard as possible, often to the point where the enemy is little more than semi-aware goo swaying through the true universe, they are now barely able to touch. Unlike most cases, this is called out, although the danger presented by and difficulty in defeating normally a Narcissist makes it a Necessarily Evil.

     Video Games  
  • In Final Fantasy X, Wakka informs Tidus that it's taboo to enter the Chamber of the Fayth unless you're a summoner, but he's ignored every time. Ultimately, it turns out the taboos were put there in the first place for very bad reasons...
    Tidus: You can stuff your taboos!
  • In Dragon Age: Origins, people talk a whole lot about how evil blood magic is. You can nonetheless walk around with a party of 3 blood mages, and nobody will bother you about it. In fact, nobody will even seem to notice, no matter how blatant you are about your use of forbidden and dangerous magic, not even the Templars who are supposed to kill blood mages on sight, including one of your party members who used to belong to said organisation!
    • However, the Warden's Keep DLC adventure mentions that the Grey Wardens don't forbid blood magic, as they will permit any advantage they can get over the Darkspawn. This and the fact that the Wardens actively encourage Mages to throw off the leash and go full out during battle is one of the reasons they have a rather shaky relationship with the Chantry.
    • In the sequel, if playing as a mage, you can roam the streets at night exploding bandits with your awesome power. Not once will you ever be accosted for being a mage roaming freely through the streets? Which is forbidden. This is Hand Waved at a couple of points, at first by your contacts and later by your social standing. Neither manages to save your sister, however.
      • You can chide Merrill for using blood magic when you first meet, and people will keep mentioning how she's dabbling in things she shouldn't be, even though the player might opt not to use any of her blood-related magic after that first scene. And at the same time, you can already have blood magic yourself, and thus start any battle by stabbing yourself brutally in the stomach and then keep on rolling by using people's own (still internal) blood against them in the most gruesome of fashions.
  • Played for Laughs in South Park: The Stick of Truth. The Player Character, The New Kid/Douchebag, is repeatedly told: "you must never fart on another man's balls." Naturally, you must break this sacred law to defeat the Final Boss, Princess Kenny.

     Western Animation  
  • In Time Squad, Larry 3000 points out that kidnapping people from the past is forbidden (yes, he used that exact word), and they do it anyway. To be fair, kidnapping someone made them actually able to do their job properly.


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