Dangerous Forbidden Technique: Difference between revisions

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** Hiten Mitsurugi Ryuu also has an ultimate technique that involves putting yourself in significant danger. If you hesitate even the slightest amount, you either die or lose your leg. If you don't hesitate, you might still lose your leg.
** Sanosuke's [[Megaton Punch|Futae No Kiwami]] becomes one over time due to its overuse. His hand injury was said to be even worse than the damage Kenshin suffered against Shishio. Though his hand never really heals, he finds ways to minimize damage.
* In ''[[DragonballDragon Ball]] Z'', Goku was taught the Kaio-Ken by King Kai, but was told not to use it at more than double capacity. When he fought Vegeta, he used it at triple capacity. When he fought Frieza, he used it ''multiplied by twenty'' -- the maximum, and still nowhere near enough to win.
** The only time it really hurts him is when he pushes it to times four while fighting Vegeta, at which point he was apparently barely able to fight. The other times he uses it, apparently, his body's toughened enough to negate the negative effects.
*** Not quite. While his body was strong enough to withstand it after the Vegeta fight, when he used the 20x kaioken against Freiza, it ate away almost all his ki, leaving him defenseless.
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* In ''[[Eyeshield 21]]'', Hiruma orders Sena to seal the "Devil Bat Ghost" technique. At first he believes this is to stop competition from seeing it, unless it is coming at them. But when he later breaks these orders, he discovers that because he is yet to master the technique fully, it puts tremendous strain on his knees, and repeated use could injure him.
** The Devil Bat Dive is a lesser-used example, and for good reason. Using their try-for-point for a consecutive touchdown, the Devil Bat Dive requires him leaping over both lines, spinning, and falling into the end zone. Such a maneuver is dangerous in both fiction AND real life, which is why most teams just go for the kick less one of their players gets thrown into the ground head first.
* In ''[[One Piece (Manga)|One Piece]]'', during the Skypiea arc, there happens to a device called a Reject Dial, which is ten times stronger than the much more common Impact Dial. Using this has a large chance of destroying the user as well as his or her opponent. Wiper, A character intent on killing the Big Bad of that arc with the Reject Dial, uses the item ''thrice'', and though his body does take massive damage, he escapes alive.
** Luffy's ability to go Gear Second, by pressing his own rubber legs really hard to increase the blood flow around his body, upgraded his strength and speed dramatically. And you thought he was superhuman ''before''. When he is first shown using it, he seemed very tired, and when he used it again against Rob Lucci, The [[Psycho for Hire]] not only deduced how the form works, but informed him that it's doing more than severely cutting his stamina, it's actually cutting into his life-force and could shorten his life span! Of course, this doesn't prevent Luffy from using the move ''[[Determinator|twice]]'' in the same fight, and further more times against [[Let's Get Dangerous|strong opponents. More so in the anime.]]
*** Although to be fair, the example from the anime [[Overtook the Manga|was just filler]].
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* In ''[[Simoun]]'', the Emerald Ri Maajon plays this role.
* In the latest chapter of ''[[Hunter X Hunter]]'', {{spoiler|Gon forced himself to grow by shortening his lifespan, using all his inborn talent to reach the power that rivals the King of Ants (strongest character as of now), with the possibility of never being able to use nen ever again (and having lifespan shortened)}}
* ''[[Yu-Gi-Oh!]]'': Industrial Illusions has the [[Idiot Ball|decidedly odd practice]] of designing cards "too powerful and dangerous to be used," requiring they be sealed somewhere or guarded to keep them from falling into the wrong hands. They ''always'' fall into the wrong hands.
** In ''[[Yu-Gi-Oh! GX]]'', there's also something called the "Cyber Legacy", which Kaiser Ryō is the inheritor to. Normally, he and the other duelists in the Cyber-Style dojo (yes, the Legacy is apparently so powerful, you need to train in a dojo to properly duel with it) practice the normal Cyber-Style (Cyber Dragon and other Cyber-type monsters), but there's another set of cards known as the Cyberdark-Style that's sealed away from even the Legacy's heir due to its immense and dangerous power. {{spoiler|Ryo learns just why it's so dangerous and forbidden [[This Is Your Brain Onon Evil|the hard way]].}}
** In the real game cards deemed too powerful are forbidden from official tournaments. If only they could be consistent on what overpowered means.
* Ryoga Hibiki's "Shishi Hōkōdan" in ''[[Ranma One Half|Ranma 1/2]]''. This [[Ki Attacks|Ki Attack]] is fueled by the user's depression and melancholy. So to acquire more power the user will purposely do things to become more depressed. When Cologne sees Ranma and Ryoga trying to out-depress each other while blasting the technique freely, she compares them to a pair of lions fighting as they roll off a precipice and to their deaths.
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* ''[[Outlaw Star]]'' featured the Caster gun which fired spiritual Caster Bullets (each type represented by a number, but the differences were never fully established for most of them.) Eventually, Gene realizes that there are three numbers that never come up, so he tracks down the gunsmiths that make these bullets. Each one gives him one of these bullets (except for the #4 bullet, which he receives 2 of), but explain that they draw on the gunner's soul, so if he fires all three, he will die. Sure enough, he needs all three.
** A slight inversion in the fact that these shells weren't originally designed to be harmful. It's just that there's so little mana left in the universe, that taking away lifeforce is the only thing powerful enough left.
* Almost everybody in ''[[Get BackersGetBackers]]'': Ginji starts going crazy if in his Lightning Emperor mode for too long; Ban can only use his Jagan three times a day, once per person per day; Himiko's acceleration perfume strains her body; Juubei's Black Flying Needles are controlled by a large magnet, and the force of the magnetic field wreaks all kinds of havoc on his body and blinds him early on.
* In ''[[Saint Seiya]]'', Dragon Saint Shiryu was warned by his master never to push his fighting technique beyond a certain limit, lest he unleash the "Ultimate Dragon", basically sending himself and his opponent into orbit. Of course, Shiryu ''does'' end up unleashing the "Ultimate Dragon". {{spoiler|But he doesn't die. His opponent has a last-minute change of heart and manages to send him back to Earth with just a kick. Seriously.}}
** That being said, the technique was never used again in the manga. In the [[Filler|next arc]] of the anime, Shiryu attempted it again as a last resort move against an opponent that had beat everyone else, but stopped when doing so would destroy a [[MacGuffin]] that was needed.
* Late in ''[[Tekkaman Blade (Anime)|Tekkaman Blade]]'', D-Boy finds that the Tekkaman transformation is slowly destroying his body. Later, he apparently gets better by "evolving" his transformation into the more powerful Blaster mode. Unfortunately, that turns out to be a better example of this, since now he's losing memories whenever he transforms, which for him is even worse.
* The protagonist of ''[[Tsukihime]]'' has the Mystic Eyes of Death Perception, which allow him see the concept of death itself on ''everything'' in the form of lines and points. Observing death, however, will lead to insanity, so he has to use special glasses which block his ability. Every time he takes off these glasses his eyes get stronger, but since humans are not meant to observe the nature of death it puts an increasingly enormous strain on him. In fact, in the {{spoiler|epilogue, which takes place a while after any of the routes, it is revealed in his reunion with his 'sensei' that he is literally on the verge of death, in part due to his ability; it is heavily implied that he actually dies just after they part ways.}}
** Ryougi Shiki, who has a more outrageously powerful version of the Mystic Eyes of Death Perception, apparently isn't suffering any effects from using that ability. On top of that, she never uses any special glasses, even though she was offered them. It also helps that, unlike the Shiki of Tsukihime, Ryougi can turn hers on and off, while his is always on.
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* [[Zoids]]: New Century has a mecha version: Among the three alternate armours available for the Liger Zero is the [[Mecha Expansion Pack|Panzer armour]]- effectively turning the Liger into a walking tank with [[Wave Motion Gun|huge guns]] and [[Macross Missile Massacre|lots and lots and LOTS of missiles]]. However, it's so [[Deadly Upgrade|heavy and power-consuming that the Liger can barely move, and quickly overheats just from wearing the armour]]. The armour is still useful, but has to be ejected on the battlefield right after each use to avoid melting the Liger Zero.
* In ''[[Soul Eater]]'', using Tsubaki's {{spoiler|Fey Blade}} mode takes a toll on Black☆Star's health. Early on, he can only maintain it for a short duration before passing out. At one point, the normally [[Yamato Nadeshiko|submissive]] Tsubaki refuses to use it out of fear for her partner's well-being.
** Eventually, he finds a way around this, at which point the mode apparently stops having a dangerous effect. Really, all it needed was for Black Star to ''listen'' to others (namely Tsubaki) in order to have a chance of working out the technique, rather than assuming it took only physical strength. Being [[Jerk Withwith a Heart of Gold|a decent guy really]], he manages it.
* Two notable examples exist in ''[[Sailor Moon]]'': Sailor Pluto, who will die if she uses the power to stop time, and Sailor Saturn, who will die if she uses her power of destruction. They {{spoiler|both break the taboo in the manga anyway and actually do die -- in Pluto's case for a whole arc -- before coming back fairly nonchalant and well-adjusted about the whole thing.}}
** In the anime there's also the whole Silver Crystal bit - use it at full power, which equates to a [[Kamehame Hadoken]] 9 times out of 10, and the user is killed. They get one last wish, though and it's usually enough to reverse it. This is not true of the manga.
* In [[Yu Yu Hakusho]], Hiei's Dragon of the Darkness Flame is an absurdly powerful technique that summons a dragon made of insanely hot hellfire that incinerates pretty much any enemy that comes into direct contact with it, even fire-resistant demons. The catch? If the user isn't sufficiently powerful enough, the dragon can turn on the caster and devour him. {{spoiler|Also subverted, as the one moment the attack ''is'' turned on Hiei, he's become powerful enough to control it, not only surviving, but also temporarily absorbing it into his body, becoming much, much more powerful.}}
** The first time he used it, he also had to offer the use of his right arm as a sacrifice.
* Train from ''[[Black Cat (Mangamanga)|Black Cat]]'' can only use railguns 5 times per day. In the final battle, he squeezed out 6th shot, resulting in him unable to perform it anymore. He's not worried, though, since he has already taken care of the [[Big Bad]].
** And Sven's eye ability makes him very tired after using it, which limits him as well, though his ability isn't near as badass.
* Parodied in [[Ninin ga Shinobuden]], where the technique that has been "banned ten years ago because it was so dangerous" is...duct tape underpants.
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== Literature ==
* Death magic in [[Lois McMaster Bujold]]'s ''Chalion'' series causes both the target and the caster to die as their souls are borne off to the Bastard's Hell (when it works at all). Not to mention that unsuccessful attempts/research are regarded as attempted murder at best and dealt with by temporal authorities as such.
* The use of "balefire" in Robert Jordan's ''[[The Wheel of Time (Literature)|The Wheel of Time]]'' is forbidden by the magic users of the world, and when people use it anyway, they're exceedingly careful with it - because balefire doesn't just obliterate its target, it goes ''back in time'' to do so, with all the potential paradox that implies. Entire cities and their recent histories disappeared from the face of the earth before the mages, good ''and'' evil, decided that maybe gratuitous use of balefire wasn't such a good idea... When Rand begins using it for more than minute uses it is seen as a sign of his rapidly deteriorating mental state impacting his judgement, though he is technically correct that balefire is the only way to ensure enemies such as the Forsaken are not ressurected by the Dark One.
** It wasn't just the cities disappearing that almost broke reality, but also having them reappear again as the destroyers were killed with balefire, and then having them vanish ''again'' if the person who did that ''also'' got killed with balefire. (Though Robert Jordan waffled on this a bit, at one point saying that the effects of balefire couldn't be undone by more balefire.)
** Picking apart a weave of the One Power rather than leaving it to dissipate is a [[Dangerous Forbidden Technique]] among the Aes Sedai, and just a bloody dangerous technique among the Aiel Wise Ones. If executed perfectly it won't leave a telltale "residue," which normally lets one channeler see exactly what another has done, but failure is extremely easy and can produce a range of consequences. {{spoiler|When Elayne tries and fails, it produces a burst of wind. A burst of wind with the force of a small nuclear explosion.}}
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*** Probably not least because it involves fracturing the soul, and doing ''that'' involves murdering people.
* [[The Pendragon Adventure]]: It turns out that {{spoiler|all Travelers can pretty much warp reality like [[Big Bad|Saint Dane]] can, but doing so drains the life force of [[Heaven|Solara]]. Saint Dane avoids these drawbacks by relying on a warped version of Solara based on darkness.}}
* In Anthony Reynolds's ''[[Warhammer 40000]]'' novel ''[[Word Bearers (Literature)|Dark Apostle]]'', creative thinking is viewed like this by the Mechanicus. Dangerous enough to be sealed away in a separate brain.
* The ''[[Dragaera]]'' series has "Elder Sorcery", which involves the direct manipulation of raw chaos, and the practice of which is a capital crime by imperial edict. Those who research and practice it do so mainly out of curiosity and/or for the search for knowledge, since elder sorcery has long since been supplanted by the ''much'' safer and easier use "normal" sorcery, where the energy of raw chaos is first filtered through the Imperial Orb before being used. However, there are some circumstances where normal sorcery doesn't work, forcing the characters to resort to elder sorcery.
* In ''The Magician's Nephew'', the first chronological book in the [[Chronicles of Narnia]] series, there is a dark spell the Deplorable Word. When it is spoken, every form of life in the world with the sole exception of the speaker is killed instantly. [[Big Bad|Jadis]] actually boasts about the extensive measures she took to learn this and then use it to kill everybody in her homeworld as part of her backstory.
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* ''[[Mahou Sentai Magiranger]]'' also has one. Anyone who uses Chronogel's forbidden time spell will die via getting sucked into a wormhole that appears on their chest while it sucks other things like matter and time into it. This curse was deliberately placed on it - apparently, the use of time magic is so dangerous that ''making sure the universe is screwed if you use it'' is the best way to protect it. Yeeeah.
* Used ''on'' the main character in [[Eli Stone]]. When Eli needs to see the future with more clarity, he asks his acupuncturist Dr. Chen to use a little-known needle combination known as "The Dark Truth." After doing it once, Eli nearly has a heart attack, which makes Chen swear it off. So Eli winds up going to Chen's [[Distaff Counterpart]] and rival. He actually has the procedure done at least three times, which is probably why {{spoiler|his aneurysm gets worse by the end of Season 2}}.
* L's fiddling with the ''[[Death Note (Manga)|Death Note]]'' rules in the live-action movies could be considered this. There's also the more common in the anime world "technique" of Shinigami intentionally lengthening lives at the cost of their own.
* In ''[[Supernatural (TV series)|Supernatural]]'', Sam's [[Psycho Serum|demon blood]]-drinking to power psychic abilities takes a toll on his sanity and turns him into an out-of-control addict. {{spoiler|It gets worse when it's revealed [[I Did What I Had to Do|all he did]] was just so he'd be [[Unwitting Pawn|tricked]] into releasing Lucifer.}} Since then, he went cold turkey (...with some exceptions...). In order to finish the [[Self-Sacrifice Scheme]] to {{spoiler|let Lucifer possess him so he can [[Heroic Sacrifice|jump]] into Lucifer's [[Sealed Evil in Aa Can|prison]] and prevent the world from being razed, Castiel says this requires for him to drink A LOT of blood.}} Castiel also hints that {{spoiler|Lucifer}}'s current Meat Suit has to drink gallons of demon blood just to keep him in.
* [[Kamen Rider Double]]'s Twin Maximum, in which he activates two [[Finishing Move|Maximum Drives]] at the same time, temporarily taking his power up to 200%. However, this puts an incredible strain on his body, {{spoiler|as demonstrated when Shotaro impulsively uses it in one battle, which lights him on fire and severely injures him. In the final battle of the series, Double's [[Super Mode]] is powerful enough that he can combine the Xtreme and Prism Memories' Maximum Drives without ill effect.}}
* The bonehead maneuver in [[Babylon 5]].
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* Several of the noble families from the [[Ravenloft]] supplement ''Legacy of the Blood'' possess the knowledge of a [[Dangerous Forbidden Technique]] or two, usually in the form of feats that only family members or their elite henchmen can select.
* In the [[Mystara]] setting, Glantrians' use of the Radiance is considered this trope even by the Alphatians, who normally consider even the darkest sorts of magic to be permissible. This isn't because it's dangerous to the wielder (which it is), but because {{spoiler|using the power of the Nucleus of the Spheres threatens to drain all magic from the world, bit by bit}}.
* In the Sorcerer game from the ''[[Mage: The Ascension (Tabletop Game)|Mage: The Ascension]]'' line, there is one Path that can have this effect: Cursing, which is [[Exactly What It Says Onon the Tin]]. Specifically, you can create an absolutely ''vicious'' curse rather than the normal version. The problem is, though, that it renders the caster a vegetable.
* ''[[Genius: The Transgression (Tabletop Game)|Genius: The Transgression]]'' has Deep Inspiration, which lets you draw out Mania directly from the Genius's mind, even if the Genius is "empty". Unfortunately, doing so too often or with too much power runs a very real risk of turning you into an [[Insufferable Genius|Unmada,]] and if you keep pushing it even after becoming Unmada...[[The Unfettered|Let's just say]] [[Complete Monster|it's a bad idea]].
* ''[[Changeling: The Lost (Tabletop Game)|Changeling: the Lost]]'' features Goblin Contracts, magical powers that are cheaper to buy than standard Contracts and have nice effects (open all the locks on a building, see the future, drain an enemy of all their [[Mana|Glamour]]). The catch? Well, they also have side effects that will likely screw you over (respectively, your locks fail the first time someone tries to break in, [[Mad Oracle|you go mad]], you lose all ''your'' Glamour).
** One particular Goblin Contract is "[[The Wild Hunt|Call the Hunt]]" which has no real catch because it is its own catch; it calls forth a hunting party of [[The Fair Folk|True Fae]]. If the changeling who uses it doesn't run away fast enough, he or she will likely be killed or, even worse, dragged back to Arcadia to be tortured once again.
* Plenty of Charms in ''[[Exalted]]'' come with heavy tolls. The more common include pushing up your Limit track, and Abyssals have some that increase resonance or mean that they'll experience [[Cessation of Existence]] upon death.
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* The [[Words Can Break My Bones|Words of Power]] from ''[[GURPS]]: Thaumatology''. Saying one will knock most characters unconscious and the most control you can ever have over a Word is none at all, trying to control it only makes things worse.
* ''[[Scion]]'' has the Avatars, which allows Gods to channel the power of a Purview at the apex of cosmic power, so much that anyone who fights them has to become one in order to match. However, while the cost to activate it is rather modest game-wise, there are some major prices to be paid: first, you suffer the strongest Fatebinding upon activation, second, if you die, all the Avatars you learned to channel get loose all at once, and third, you activate it in the domain of a Titan, you'll attract every Titan Avatar in it, and chances are, they'll already have their own powers ready as well. Congrats, you now get to fight five or six beings with the same power as you.
* ''[[Magic: theThe Gathering]]'' has a bunch of cards that are effectively this. You can't miss them, because they all inform you that ''you lose the game'' after a certain amount of time or if a certain condition is met. For example, [[Hour of Power|Final Fortune]] allows the user a free turn at a cost and color that doesn't normally get it, but the user loses the game at the end of that turn if they haven't won yet. [[Immortality|Lich and its variants]] protect you from dying through life loss, but kill you under other circumstances, such as an empty graveyard.
 
 
== Video Games ==
* In [[Diablo]] III, the Wizard differs from the Sorcerer and Sorceress of the previous two games in that s/he practices "dangerous and forbidden magics", which eventually caused him/her to be voluntarily exiled from his/her homeland. This explains why the Wizard has a greater array of [[Elemental Powers]] than either of its predecessor classes, including [[Mana|Arcane]] and [[Time Master|Time]].
* Similar to his [[Sonic X|anime counterpart]], [[Sonic the Hedgehog|Shadow the Hedgehog]] can gain an extreme power boost whenever he removes the bracelets from his arms. Unlike the [[Sonic X]] version, however, it doesn't appear to drastically drain his energy. He only used this power once in ''[[Sonic the Hedgehog 2006 (Videovideo Gamegame)|Sonic the Hedgehog 2006]]'' to save himself, Rouge and Omega from [[Big Bad|Mephiles the Dark]], who used two of the Chaos Emeralds to create an army of clones of himself.
* In the Fate scenario of ''[[Fate/stay Stay Nightnight]]'', Saber comes under this limitation because using her Noble Phantasm requires all the mana she's currently holding to activate (and her flawed summoning means Shirou can't provide her with any), and she ends up facing at least three enemies that require -- or at least seem to require -- the use of it to defeat.
** In Heaven's Feel, projection {{spoiler|(more specifically, projection using Archer's arm)}} becomes this for Shirou. While it puts a strain on him in all three paths, this path spesifically gives him a clear limit on usage, and overuse will kill him. {{spoiler|Which it eventually does.}}
** Furthermore, each Servant has a power known as the Broken Phantasm -- willingly breaking their Noble Phantasm. This renders the servant without their proof of heroism (which for many of them is their weapon), but also inflicts massive one-time damage on whoever the Phantasm is shattered on. {{spoiler|Archer, who can create Noble Phantasm duplicates, routinely uses this technique to compensate for the fact that his duplicates are weaker than the real thing.}}
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** In their collective defense, Snowe was really, ''really'', '''really''' hard to forgive. It's not so much that the previous bearers were lacking in forgiveness as it is that the hero has to be a veritable saint just to let Snowe live, much less invite him to join the crew.
** And really, with the Rune influencing events so that, for instance, {{spoiler|a young boy has to choose between using its power or watching his village get burned to the ground by his own countrymen}}... It's pretty much damned if you do, damned if you don't.
** Compare the Soul Eater Rune in the first [[Suikoden I|Suikoden]] game, which...[[Exactly What It Says Onon the Tin|eats souls]].
*** Not exactly a [[Dangerous Forbidden Technique]] in and of itself, but, when the hero offers to use it to power up another rune towards the end of the game, he is ''severely'' chastised by Leknaat, who states that the true power of the Soul Eater must never be unleashed, implying this trope is in effect.
* In the ''[[MegamanMega Man Battle Network]]'' games, the Dark Chips are extremely powerful, but that permanently reduce your max HP by 1 with each use. Also, each use drops your [[Karma Meter]], and enough uses will disable Soul Unisons.
** Battle Network 5 also has Chaos Soul Unisons, which allows you to use a Dark Chip as your charged shot for one round of battle without any of the permanent negative side effects. However, there is a 50-50 chance ([[Game Breaker|game-breaking glitch]] notwithstanding) that the charged shot will fail and backfire, instead summoning an invincible shadow copy of Mega Man to join the enemies and attempt to beat the crap out of you.
* In ''[[The World Ends With You (Video Game)|The World Ends With You]]'', Joshua uses his {{spoiler|[[Beam Spam|Jesus Beam]] attacks to get himself and Neku out of a battle with a Taboo Noise. Though not dangerous in itself, he held back this power until this moment to conceal his identity as the [[God|Composer]], and used this power in the sight of a Reaper, thereby drawing suspicion to himself.}}
** {{spoiler|Hanekoma}} later proceeds to {{spoiler|revive Minamimoto as a Taboo Noise}} He reveals this himself to the player in the {{spoiler|[[Unreliable Narrator|secret reports]]}}
* Some Techniques and Spells in [[Romancing Sa GaSaGa]] drain [[Life Energy]] if one is low leveled in That field of magic or if the weapon uses [[Life Energy]] for it's techniques.
* ''[[Valkyrie Profile Covenant of the Plume]]'' has a [[Player Punch|heartbreaking]] example in the Destiny Plume. Left by Lenneth on Wylfred's father's body and corrupted by the goddess Hel, it can make any unit absurdly powerful - ten times as powerful in every single stat. And at the end of the stage, they die. Wyl is forced to use its power on his best friend and would-be [[Lancer]] at the beginning of the game...
** Exactly how forbidden to make it is left up to the player, though, and [[Multiple Endings|affects the outcome of the plot.]]
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* ''[[Vagrant Story]]'' has learned techniques that, when used, [[Cast From Hit Points|drain a portion of your health]].
* Akuma's (Gouki in the original Japanese) fighting-style from ''[[Street Fighter]]'' has the Shun Goku Satsu attack, which effectively drags both the target ''and'' the practitioner into hell, where they're assaulted by demons. Until it was mastered by Akuma, it was generally assumed that using it would always be lethal to both. Of course, in-game, it's just a move that does a lot of damage...
* ''[[Team Fortress 2 (Video Game)|Team Fortress 2]]'': There is an unlockable weapon for the Demoman class called The Eyelander, a massive sword which decapitates and heals its user on a killing blow. The downside is that having the sword in your loadout reduces your max HP by 25, because the blade ''feeds on your soul''.
** Averted when, upon killing enough people with the eyelander, the Demoman becomes second in max health only to the Heavy and in speed to the Scout (or a Soldier with the Equalizer at maximum effect).
** A more appropriate example is the Equalizer. It's possible for a [[Jack of All Stats|Soldier]] to become [[Fragile Speedster|super fast]] and [[Glass Cannon|do huge damage]] when wielding the melee weapon and [[One-Hit-Point Wonder|at low health]]. Obviously while powerful, using the weapon this way is very risky, as a casual shot could kill the soldier. Oftentimes cornered soldiers with no rockets use this tactic as a last resort.
** A sillier example is the close combat Ullapool Caber. Is it a giant log that takes health of the user when you swing it? No. It's a stick grenade, that you whack people with. It only works once, and you sure as hell are going to feel it if you don't have any bonuses because it explodes in your face. Despite the fact that you are dead if you come across another enemy, it's quite deadly, and can be useful as a last resort or for [[OHK Os]] with a critical charge.
* The first four [[.hack|.hack//]] games feature Data Drain, a technique that allows the user to either severely weaken a computer-controlled enemy, or [[Mind Rape]] a human being (most humans hit with a Data Drain end up in comas). The hero, Kite, is the only human with the ability. He uses it to weaken game enemies that have been hacked so as to have infinite HP, thereby making them defeatable, and to gather virus data to hack into protected areas of the game. The catch is that repeated use will corrupt his character data with the virus, causing nasty side effects in battle and, eventually, his character's death.
* Multiple moves in the ''[[Pokémon (Franchise)|Pokémon]]'' franchise harm the user (such as [[Taking You Withwith Me|Explosion]]), but these moves also tend to be very powerful.
** And then there's the move "Struggle," which is a rather weak move that damages the user by 1/4th of it's max HP. Chances are, you're only using it four times before you die.
** Focus Punch is extremely powerful, but at two costs. 1. It takes one turn to power up, leaving it open for attack. 2. If your pokemon is hit while powering up it "loses focus" and can't attack.
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* In ''[[Zettai Hero Project]]'' Dangerama's entire skillset is composed of these. As a [[Death Seeker]], this makes sense.
* The "Mortal Draw" in ''[[Twilight Princess|The Legend of Zelda: Twilight Princess]]''. The attack involved sheathing your sword and untargeting the enemy. As soon as the enemy is within range you quickly pull out your sword and deliver a powerful attack able to one-shot most enemies. However, if you screw up the timing you're going to get hit.
* [[Blood Magic]] in the ''[[Dragon Age]]'' [[Dragon Age II|games]]. It is ''extremely'' powerful and dangerous -- [[Bloody Murder|to]] [[Mind Control|enemies]], [[Powered Byby a Forsaken Child|allies]], [[Cast From Hit Points|and the user]] -- and for many, many reasons, it is forbidden everywhere in the world. Even the Tevinter Imperium officially condemns [[Blood Magic]], though in practice all of the Magisters are secretly Blood Mages.
** Though the [[Well-Intentioned Extremist|Grey]] [[Knight Templar|Wardens]] don't forbid blood magic.
* In ''[[Trauma Center]]: Under the Knife'' Derek's senior surgeon forbids him from using the [[Bullet Time|Healing Touch]] after his first intentional use of it makes him collapse after the operation... with the caveat he's completely aware Derek will merrily ignore this instruction if he thinks the Healing Touch will mean the difference between life and death.
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== Webcomics ==
* '''[[MS Paint Adventures|SEPULCHRI-]][[Problem Sleuth (Webcomic)|TUUUUUUUUUDE!!]]'''
** [[It Makes Sense in Context|"No, you fool! Don't you realize if you initiate that attack, it will be the last thing you do??? Fiesta smacks some sense into you."]]
* '''[[8-Bit Theater (Webcomic)|HADOKEN!!!!]]'''
** Although not considered forbidden, Black Mage is only able to cast that spell once a day, and it makes a cute little [[Nuke'Em|nuke-sized]] crater wherever he aims it.
** Spells that drain the net amount of love from the universe with each use and require the sacrifice of orphans to gain in the first place tend to have a bit of a social stigma against them. Black Mage seems to find an excuse to use it nearly every day...but then again, this is [[Complete Monster|Black Mage]] we're talking about here.
* [[Last Res 0 rtRes0rt|Jigsaw Forte's Zombie Mode]], while not explicitly a [[Dangerous Forbidden Technique]], effectively becomes this when you realize if she uses it ''at all'' while on camera, she's blown her personal [[Masquerade]] (which means if she doesn't die from using it in the first place, ''she will'' when she's done).
** [[Word of God]] implies that abusing the form does have plenty of consequences, but it depends on how she uses it / how much damage she sustains, not necessarily how often.
* In ''[[El Goonish Shive (Webcomic)|El Goonish Shive]]'', magic apparently drain users at various rates. Spells too powerful to handle may overtax even well-trained magic users, possibly even [[Brought Down to Normal|removing their magic for months at at a time.]]
 
 
== [[Western Animation]] ==
* ''[[Avatar: The Last Airbender (Animation)|Avatar: The Last Airbender]]'': While it's not really forbidden, lightning redirection (a Firebending technique where you internalize lightning and shoot it in another direction) is extremely dangerous, to the point where even teachers of the move refuse to practice it with their students. First, you have to ''catch'' the lightning, which is just as dangerous as it sounds. While internalized, the lightning must be carefully controlled so it doesn't travel through vital organs. By the end of the series, only three characters know the technique, and only [[Memetic Badass|Iroh]] is skilled enough to avoid the dangers consistently.
** {{spoiler|Energybending also carries the danger of mentally and spiritually destroying those who attempt to use it on others if their willpower isn't strong enough. This nearly happened to Aang when he used it on Ozai.}}
** {{spoiler|Bloodbending, supposedly the ultimate technique of waterbending, which involves moving around the blood in a living body and making that body do whatever you want it to do. [[Nightmare Fuel]], much?}} Note that it's not dangerous, but it ''does'' fit the immoral aspect.
* In ''[[WITCH (Animationanimation)|WITCH]]'', the [[Elemental Powers|Guardians]] can choose to transform into living embodiements of their elements, giving them [[Physical God]] levels of power- at the risk of losing their personalities and humanity, and being left open to mental domination from outside forces, such as [[Big Bad]] Nerissa. {{spoiler|Fortunately, the one time they do this, they manage to come back- barely}}.
* ''[[Re Boot]]'': Bob's fusion with Glitch is viewed as doing the unthinkable by Daemon's adviser, and Bob was fully aware that overusing his new Glitch powers would kill him. Bob comes very close to death when Daemon infects and forces him to overuse his powers to create portals. Bob does imply that the fusion would have been much less dangerous had Glitch not been damaged at the time (which is what necessitated the merger in the first place), however.
* [[Transformers]] examples: