History Main / YinYangBomb

Of course, sometimes you have an AntiHero, the guy who wields [[CastingAShadow the power of darkness]], [[BadPowersGoodPeople powers himself on negative emotions]], and probably has an [[DarkAndTroubledPast angsty past.]] He probably dresses in all [[DarkIsNotEvil black]], too. In extreme cases, the Dark Hero would like nothing, ''nothing'' better than to wrap his hands around his archnemesis's throat and strangle the life out of him. Think [[VideoGame/{{Boktai}} Sabata]], ComicBook/{{Raven}}, and Franchise/{{Batman}}.

** Arthur becomes an unorthodox example thanks to a series of revelations from Volume 8 onward. After [[spoiler:Sylvie performs a HeroicSacrifice to save him at the climax of the previous volume, his body has become part draconic. Later on in the same volume, he encounters a [[{{Precursors}} Djinn]] VirtualGhost who recognizes him as a descendant. This means in his current form he is a HalfHumanHybrid with dragon and Djinn ancestry. The "Yin Yang" part is that the former committed genocide upon the latter out of jealousy for the latter's ability to control [[ElementNumberFive aether]], which the former believed was exclusively theirs to control.]]. It is worth noting that while as stated above that [[spoiler:Sylvie has Vritra blood which in turn would make Arthur part basilisk as well, this has had no bearing in the novel so far. The bottom line being that Arthur now exhibits the same enhanced physiology that both the Indrath and Vritra have as Asuras]].

* In ''Manga/DGrayMan'', Allen has the power of Innocence to destroy akuma as well as having powers from an akuma curse. [[spoiler: As well as those of the 14th Noah, the Musician, also known as the Noah of Destruction]].

** At the same time, Shoto himself [[DefiedTrope defies]] this trope out of resentment toward his abusive father. He consistently refuses to make use of his body's left side (the fire half) until [[spoiler: a respected rival of his convinced him he was only hindering himself by doing so]].

** When Naruto and Sasuke have their final fight in the Valley of The End [[spoiler: they use their Yang and Yin Six Paths Chakra’s to create their most powerful forms, Asura Kurama Mode and Indra Susanoo and then use their respective strongest attacks in those forms at each other which destroys the valley and brings them back to their base forms.]]

** Played still straighter in ''War of the Green Lanterns'', in which Guy Gardner manages to wield a red ring and a violet ring together, the two colors at the farthest extremes of the Emotional Spectrum. They represent rage and love, making this the most strongly opposing ring pairing. Guy himself was having difficulty using the paired rings, until he found something he could focus his love and rage on at once: [[spoiler: He loved the Green Lantern Corps, and he was enraged at it being destroyed]].

* ''Fanfic/AgesOfShadow'': During the climax of the Third Age arc, [[spoiler: the combined power of the Sun Souls permanently [[SealedEvilInACan seal]] [[FallenHero Jade]] in the Shadow Netherworld. In the process, the Sun Soul energy mixes with Jade's spilled blood; this mixture of magics kickstarts life in the barren Netherworld, including birthing four nonhuman infants.]]

** Wanda, Doctor Strange's anointed successor [[spoiler: who takes on the role when he abdicates in the sequel]], can not only handle dark magic, but wields [[EntropyAndChaosMagic Chaos Magic]] into the bargain. Later, Hermione also displays a much unwanted aptitude for it, largely because [[spoiler: she's Wanda's daughter]].
** In the finale of the first book, Harry uses [[spoiler: Phoenix Fire]] and Chaos Magic to put reality back together, having been manoeuvred into place by Doctor Strange.

** Arthur becomes an unorthodox example thanks to a series of revelations from Volume 8 onward. After [[spoiler:Sylvie performs a HeroicSacrifice to save him at the climax of the previous volume, his body has become part draconic. Later on in the same volume, he encounters a [[{{Precursors}} Djinn]] VirtualGhost who recognizes him as a descendant. This means in his current form he is a HalfHumanHybrid with dragon and Djinn ancestry. The "Yin Yang" part is that the former committed genocide upon the latter out of jealousy for the latter's ability to control [[ElementNumberFive aether]], which the former believed was exclusively theirs to control.]].
*** It is worth noting that while as stated above that [[spoiler:Sylvie has Vritra blood which in turn would make Arthur part basilisk as well, this has had no bearing in the novel so far. The bottom line being that Arthur now exhibits the same enhanced physiology that both the Indrath and Vritra have as Asuras]].

** Volume 10 reveals that [[spoiler: Arthur is not the only Asura/Djinn hybrid, as when he visits the Hearth he encounters the hybrid offspring of the Djinn and the Asclepius Clan of phoenixes after they tried to save the Djinn from the genocidal Indrath. One of these hybrids, Chul, ends up sparring with Arthur. Arthur decides to take him as an ally against both Agrona and Kezess as Chul wishes to avenge the death of his mother at the hands of Agrona and the Legacy as sign of alliance with Mordain (without alerting either Agrona and Kezess of his involvement)]].
* ''Literature/LoneWolf''
** In book 7, ''Castle Death'', the owner of said castle, Lord Zahda, uses a Lorestone and a Doomstone in combination.
** Lone Wolf himself can wield a holy weapon like the Sommerswerd and infernal weapons like Helshezag. (Theoretically not at the same time, but that doesn't stop some players to have houseruled DualWielding.)
** The villain Vonotar the Traitor is said to be one of the only people able to master both the good-aligned Left-Handed Magic and the evil-aligned Right-Handed Magic.
* ''Literature/HighSchoolDXD'':
** Before an important fight, [[DemonOfHumanOrigin Issei]] makes a deal with Red Dragon Emperor Ddraig, the spirit of his [[PowerFist Boosted Gear]], to unlock its [[NextTierPowerUp Balance Breaker]] form for ten seconds -- in exchange, Ddraig's influence encroaches on his body and transforms his arm into that of a dragon. When Balance Breaker fails, it turns out that ''the arm itself'' was his backup plan -- [[DisabilityImmunity since it's no longer demonic, it isn't harmed by holy symbols]], allowing him to use them against other demons with impunity. Later, Issei would take this further by integrating the holy sword Ascalon into his Boosted as a BladeBelowTheShoulder, despite Ascalon being a weapon designed to kill both demons and [[TheDragonslayer Ddraig himself]].
** Before he [[DemonOfHumanOrigin became a demon]] with SpontaneousWeaponCreation abilities, Kiba was a survivor of the Holy Sword Project, an experiment by corrupt clergy to create a person who could wield [[HolyIsNotSafe dangerous holy weapons]] like Excalibur. Reuniting with the spirits of his deceased friends from the project would allow Kiba to unlock his Balance Breaker: "Sword of Betrayer", a powerful weapon that has both holy and demonic properties at the same time. This turns out to be a major PlotPoint, as the [[BeyondTheImpossible sheer impossibility]] of someone merging the powers of {{God}} and {{Satan}} without them rejecting each other is proof that [[spoiler:both God and Satan are dead, and the archangels who took over for God are unable to keep all of the laws of reality in place]].
** Issei is able to integrate a fragment of Vali's [[StatusInflictionAttack Divine Dividing]] into his own [[StatusBuff Boosted Gear]] and use its powers as his own, despite them being diametric opposites. By this point Ddraig is no longer even surprised, and claims that Issei can do this because he's simply [[AchievementsInIgnorance too dumb to understand when something is impossible]].
** In volume 12, Issei receives a new body created from the energy of [[{{Ouroboros}} Ophis]] (the Dragon God of Infinity) and the flesh of [[BeastOfTheApocalypse Great Red]] (the Dragon God of Dreams). This is described as making him an OxymoronicBeing, a humanoid [[TitleDrop "Dragon of Dragons"]] whose power is both everything and nothing.
* Defied in ''Literature/TheBible''. As 2 Corinthians 6: 14 puts it, "For what do righteousness and wickedness have in common? Or what fellowship can light have with darkness?". It's an analogy referring to physical light and darkness, not figurative. It's saying that righteousness and wickedness are as alike as light and darkness (meaning mutually exclusive), not that righteousness = light and evil = dark.

* High magic in ''Literature/TheDarkProfitSaga'' is split into Solamancy (life, fire, and water) and Noctamancy (death, air, and earth), those few Omnimancers who can cast both are stereotyped as lunatics prone to blowing themselves up by accident. However, in the distant past the Twilight Council of Omnimancers kept the other mages in check, until they were overthrown in a coup, and the artifacts they created are insanely powerful by modern standards. [[spoiler: In ''Son of a Liche'' Jynn, who'd only practiced Noctamancy for over twenty years, is outed as an Omnimancer, but being one of the few Omnimancers with any formal training in magic he's able to muster enough power to defeat the villain of the book and sets out to rebuild the Twilight Council.]]
* In Literature/{{Discworld}}, Otto von Chriek has channeled the Yin Yang Bomb for MundaneUtility. He's mastered the art of photography (using light to capture images), as well as ''obscurography'' (using ''pure darkness'' to capture images; the side effects tend to be disturbing).

* ''Literature/TheElricSaga'': Elric of Melnibone wields a sword derived from the forces of Chaos, but works towards the cause of Law. In the end [[spoiler: he introduces enough Law into the world to help fledgeling humanity survive and grow, only for the sword to immediately kill him]].
* Creator/NKJemisin's ''Literature/InheritanceTrilogy'': Godlings born of the GodOfChaos and GodOfOrder are vanishingly rare but ''very'' powerful, thanks to the conflict inherent in their nature. One of them is Lil, goddess of Hunger, who's pretty much insane by mortal standards but can drive off a [[KillTheGod deicidal]] monster that had already [[CannibalismSuperpower consumed the powers]] of multiple godlings.
* Ursula K. Le Guin's ''Literature/TheLeftHandOfDarkness'' makes a poem about this (about the larger theme of balance in general): "Light is [[TitleDrop the left hand of darkness]], and darkness the right hand of light." They're one and the same.

** This becomes the entire point of the end of the trilogy. The prophecied [[TheChosenOne Hero of the Ages]] destined to [[spoiler:combine the powers of Ruin and Preservation]] could be male or female based on the ancient grammar. [[spoiler:It turns out he's a eunuch instead.]] [[spoiler:Explored further in the ''Literature/WaxAndWayne'' sequel series: holding two diametrically opposed Shards makes Sazed, then known as Harmony, extremely powerful, but also makes it [[GodsHandsAreTied very difficult for him to take action]].]]
** In addition, this trope is the secret of [[spoiler: the immortality of the BigBad]] of the first book. The first book reveals two [[FunctionalMagic magic systems]]: Allomancy, which works by ingesting various metals and consuming them to get temporary power-ups, and Feruchemy, which works by saving up a person's own attributes like strength or health in metals and consuming them later in an EquivalentExchange. Both are inborn. Allomancers are generally more dominant in society and more oriented towards combat, but we're told that Feruchemy has its own strengths and weaknesses and can do things that Allomancy can't. In the end, [[spoiler: we learn that if someone is both an Allomancer and Feruchemist, storing up attributes in metal then burning the metal gives them back ten times what they lost; doing this with youth and health makes them effectively immortal]].
** That said, Feruchemy and Allomancy aren't opposites. The opposite of Allomancy is [[spoiler: Hemalurgy, which is of Ruin just as Allomancy is of Preservation, and requires the user to steal power from others. Unlike the other two, it can be used by anyone, including Allomancers.]]

* Franchise/StarWarsExpandedUniverse:

** In the novel tie-in to ''VideoGame/StarWarsTheOldRepublic'', ''Literature/{{Revan}}'', when Revan recovers all of his memories and thus his full knowledge of the Dark Side, his most powerful Force technique is [[spoiler:to simply gather up as much of both as he can hold... and smash them together. It's enough to knock back the Sith Emperor, an otherwise InvincibleVillain who is fighting with [[spoiler: the Dark Side energy of an entire world's population.]]

** In [[Literature/RhythmOfWar the fourth book]], [[spoiler: it is discovered that any two of the three Lights can be combined into a new Light by the creation of a Rhythm that unites the rhythms of the appropriate two Shards. Honor's Stormlight can be blended with Cultivation's Lifelight to create the essence of their divine child the Sibling, while the discovery of the titular Rhythm of War allows Stormlight to be blended with Odium's Voidlight to create a new energy known as Warlight.]]
** And even closer to this trope, [[spoiler: it is also discovered that you can ''invert'' a Light by a process involving singing the opposite tone to that Light's native tone. This "anti-Light" and the corresponding true Light violently annihilate each other on contact, which can cause massive explosions. More importantly, anti-Light is the only way to truly destroy creatures of Investiture such as spren.]]

* ''Literature/FixedDamage'': While most people think [Light] and [Darkness] attributes are antithetical to each other and will mutually annihilate, that's wrong. They may be mutually antithetical, but they feed off of and strengthen each other when they clash, and they have a tendency to fuse into [Chaos] which precious little can stand against. Chrome and Yuno learn this by accident when they clash both with each other and with other wielders of their respective opposite element.

* ''Series/{{Charmed|1998}}'':
** In "[[Recap/CharmedS2E21ApocalypseNot Apocalypse Not]]", Prue and War get temporarily displaced when the Charmed Ones and the Four Horsemen accidentally combine powers. It takes another combination, this time intentional, to bring them back.
** The episode "[[Recap/CharmedS6E22ItsABadBadBadBadWorldPart1 It's a Bad, Bad, Bad, Bad World, Part 1]]" had Phoebe and Paige traveling to a MirrorUniverse and fighting their {{Evil Twin}}s. The battle between the two Paiges causes explosions due to their opposing powers colliding. Later, they team up with their evil twins and form "The Power of Four" by combining their powers to devastating effect.

*** Zi-O's MidSeasonUpgrade "Zi-O II" combines two Ridewatches - a gold one he already possessed, and a reversed black one which he received after [[SplitPersonalityMerge accepting and fusing with]] his more violent self from [[Series/KamenRiderRyuki the Mirror World]]. He describes this form as wielding the power of light and darkness as one, granting him the ability to [[TimeMaster see into the future, rewind time]], and perform {{Unblockable Attack}}s. This ''greatly'' disturbs his friends [[TerminatorTwosome Geiz and Tsukuyomi]], who see it as a sign that their attempt to change history has failed and Zi-O is starting to turn into Ohma.

* Henry Mills in ''Series/OnceUponATime'' seems to be heading for this. The kid's got one hell of a TangledFamilyTree; his paternal grandfather is The Dark One, Rumplestilskin, his paternal great-grandfather is [[spoiler:Literature/PeterPan, who is a ''terrifying'' sociopath in this timeline]], his maternal grandparents are Literature/SnowWhite and PrinceCharming. His adopted mother is Snow White's stepmother, and ''her'' mother was even worse. His birth mother is explictly called a prophesied [[TheChosenOne "Savior"]]. The kid has ''just'' hit his teens, but survived the same sleeping curse that hit grandma Snow, used it to deliver an artifact to Literature/SleepingBeauty via dreams, used the heart-ripper spell his adopted mama is fond of (though he used it on himself), and has shown to have some of the best and worst traits of ''all'' of the above kinfolk. Some fans just joke he ought to be handed a [[Franchise/KingdomHearts keyblade]] and be done with it.
** [[spoiler:Regina]] may count, too. She was already a powerful dark sorceress, but as of Kansas, she now has powerful light magic as well. In season 4, she seems to be using both (ripping out hearts is definitely dark magic, but the protection spells in Fall were probably light magic since [[spoiler: her Shattered Sight persona]] couldn't get through them).
** And then we have [[spoiler:Emma Swan]]. She is two different extremes of both light and dark. [[spoiler:Not only is she the ultimate creation of TrueLove, but she's also the Dark One.]]
* ''Series/TheOutpost'': Both the [[HiveMind White Kinj]] and the [[TouchOfDeath Black Kinj]] give their hosts CompleteImmortality... unless said hosts come into contact with each other, at which point the Black's power overcharges and [[ReducedToDust kills them both]]. [[spoiler: In the Season 3 finale, Gwynn [[HeroicSacrifice sacrifices herself]] by taking on the Black to kill [[BigBad Yavalla]], who has the White]].

* In the religion of Voodoo, a [[http://en.wikipedia.org/wiki/Bokor bokor]] is someone who "serves the loa with both hands", meaning they combine light and dark magic.

* A long part of ''VideoGame/{{Albion}}'''s gameplay requires the player to retrieve two scrolls that together, hold the knowledge to combine magic and technology, which are polar opposites of each other. The end result is [[spoiler: a magical seed that can absorb nuclear energy and grow into an entire jungle in just a few minutes, spurting vines strong enough to crush an otherwise indestructible supercomputer, and overgrow the mining facility it controlled.]]
* In ''VideoGame/AncientDomainsOfMystery'' you can pull it off quite literally, when you dip a scroll of corruption removal/chaos resistance (in versions 1.1.1 and earlier) with a potion of raw chaos. There is a unique death message if your character gets killed by the resulting fireball: "ripped apart when confronting Order and Chaos".

* [[spoiler:The title character]] of ''VideoGame/{{Bayonetta}}'' is born of both a Lumen Sage [[spoiler:who turns out to be Father Balder]] and an Umbra Witch. That said, she was raised as an Umbra Witch and has yet to be seen using the benefits of the light side.
** The final boss of the [[VideoGame/Bayonetta2 sequel]] [[spoiler: took the Eyes of the World from Bayonetta and Balder, meaning he's using both light and dark. Nothing in his attacks really makes it ''look'' like he's using them. Also, the fight is a team up between both Bayonetta and Balder.]]
** This trope is mentioned in the theme song. Still yet to be used.
---> '''Bayonetta(?):''' [[DanceBattler I will dance]] and I'll defeat them through the light and the dark...
** Also from the sequel, [[spoiler:the climax of the FinalBoss has Balder and Bayonetta perform a summoning together, calling forth Omne, Controller of Creation, who wields the powers of both Paradiso and Inferno.]]

* [[SpaceElves The Awoken]] from ''VideoGame/{{Destiny}}'' [[spoiler:were created by a Yin-Yang Bomb; they were human colonists trying to flee the solar system during [[ApocalypseHow the Collapse]], but they weren't fast enough and got caught in the crossfire between [[CrystalDragonJesus the Traveler]] and [[EldritchAbomination Darkness]]. The Light and Dark energies bombarding their ship combined to create [[UsefulNotes/BlackHoles a singularity]] that sucked them into [[{{Arcadia}} a newly-created pocket dimension]] and mutated them into the ethereal [[{{Transhuman}} Transhumans]] they are now.]] This is why they wield powers no other beings possess; they're a strange sort of middle ground between the Light and the Dark. The Exo Stranger outright referred to them as "wavering between the Light and Dark".
** [[spoiler: In the sequel, ''VideoGame/Destiny2'', in the "Beyond Light" storyline, Guardians themselves become this, gaining Darkness-based abilities in addition to their usual Light-based ones. According to the Exo Stranger, A.K.A. Elizabeth "Elsie" Bray, Darkness exists in every living being, just like the Light. In the timeline she comes from, Guardians turned to the Darkness in desperation and became corrupted by it. In "Beyond Light", Elsie seeks to prevent history from repeating itself by helping Guardians to master the subclass Stasis, granted from the Europan Pyramid, which takes form as the power of ice.]]
*** [[spoiler: The storyline going forward has Guardians gain further Darkness abilities to combat the new more powerful threats emerging. In "The Witch Queen", Guardians unlock the power of "Deepsight", a Dark-based power than enables them to look into the past and see through the illusions of Savathun's Throne World. In "Lightfall", the Guardians gain the subclass Strand, a second Darkness subclass that draws on the Weave and the "river of souls" that flows through all living beings.]]
*** [[spoiler: Savathun herself becomes this during "The Witch Queen". After she is freed from her worm, she dies, but is later resurrected by the Traveler, being reborn with the power of the Light. Her new army consists of similarly revived Hive Guardians like herself, called the Lucent Brood. Despite their new Light-based powers, they retain many of the elements from their previous lives of drawing upon the Darkness. They continue using their old Hive weapons, weapons made using Hive magic, which draws from Darkness, and Savathun herself continued using Hive magic for her own plans.]]
*** [[spoiler: The Raid for the Lightfall expansion, "Root Of Nightmares", revolves around Nezarec, one of the Disciples of the Witness, who was reborn as this trope. Once a being of immense Dark power, after he was killed by Savathun, his body was buried in the Witness's Pyramid. At the start of the "Lightfall" storyline, the Traveler launched a beam of immense Light energy to attack that Pyramid. The beam made contact with Nezarec's body, and the Traveler's innate terraforming power caused Nezarec to be resurrected, only now with both Light and Dark energy at his disposal. The boss fight against him in the Raid involves turning the combined forces against him to break his defenses.]]
*** [[spoiler: The Exotic weapon for "Root of Nightmares", Conditional Finality, is an example of this. It's a two-shot shotgun that uses both Stasis and Solar, which are considered opposing powers. The first shot is a Stasis shot that freezes an enemy and the second shot is a Solar shot that Ignites them.]]

** Nero, introduced in ''VideoGame/DevilMayCry4'', follows a dynamic similar to Dante's above. He uses the sword Red Queen, a human-made anti-demon weapon, alongside [[spoiler: Vergil's sword, the Yamato, a weapon of demonic origin.]]

** ''VideoGame/FinalFantasyBraveExvius'' is one of the few games that inverts it. Sakura, who joins halfway through the game's first season, has both light-element and dark-element attack abilities. She does also have one ability that combines both elements - but in her case, she combines them to create a defensive shield that halves damage from both sources (it also halves electric damage, but that's because Sakura is a specialist in lightning-element skills and spells).

* In ''VideoGame/IllusionOfGaia'', Dark Knight Will fuses with Light Knight [[spoiler: Kara]] to destroy the CometOfDoom.

** The latest is Luo Yi, who uses Yin and Yang energies. Through her passive skill, ''Duality'', she can apply Yin and Yang marks on enemies or on the field - entities with opposite marks, when close enough, will be pulled together like magnets and will be stunned for a moment.

* In ''VideoGame/MortalKombatX'' one of the new character variations for Liu Kang is the Dualist Style: with this he can switch some of his techniques into being either Light-Aligned (which heal Liu Kang when they connect) and Dark-Aligned (Which are tricky to use but can cause a lot of damage). Fittingly, the emblem for this style is a Yin Yang.

* ''Webcomic/OneHundredAndEightyAngel'': In Episode 97, Sam creates and wields [[DualWielding two swords]] during her fight with [[spoiler: Paymon]]; one of light from her halo, and another of darkness from her scythe.
* ''Webcomic/ChampionsOfFaraus'' for the climactic battle of #1 "''The first one''"'s story arc, Leilusa, a godess of shadow,and Hyperion,a god of light, have [[spoiler:Flamel]] use rune magic they set up to fire a combination shadow/light attack at [[spoiler: the cultist who has merged themselves with several durable/dangerous spirits]].While the two magics swirl around each other while moving,the result upon impact is an explosion.
* At the end of the "Storm of Souls' arc, Webcomic/DominicDeegan has to fight Celesto Morgan, the Champion of Chaos and Darkness. Celesto assumes that Dominic is the appropriate counter for him -- the Champion of Law and Light. But no, he is the Champion of Balance, imbued equally by Light (thanks to his brother, Gregory, a powerful White Mage), Law (through Klo Tark, a master of mind-magic), and Dark (through the AntiHero Necromancer, Rillian). When Celesto strikes him with an attack concentrating the pure Chaos of the Storm of Souls, Dominic [[http://www.dominic-deegan.com/view.php?date=2005-04-11 absorbs it]]. However, it's soon revealed he needs to take it a step further by gaining the physical elements -- which [[spoiler:Leafette's HeroicSacrifice]] provides him.

* In ''Webcomic/SlightlyDamned'' fire demon Buwaro and water angel Kieri did this by accident. Kieri was showing Buwaro a spell for making bubbles and when Buwaro tried blowing a bubble with her, he used his fire breath, with resulted in them making a bubble with a flame inside it, which hit Tsavo and exploded.
* ''Webcomic/TowerOfGod''. FUG's signature move, the Hwa Jeop Gong Pa Sul is based on using to opposing forces of Shinsu at once to create a devastating attack.

[[folder:Web Originals]]

** Averted in the SequelSeries ''WesternAnimation/TheLegendOfKorra''. Raava and Vaatu are shown as spirits of light/peace and darkness/chaos respectively. They strongly invoke yin-yang symbolism (to the point of turning into the symbols briefly), but they are in eternal conflict over which one dominates, making them mutually exclusive. The series ends with Raava victorious over Vaatu, but as Raava herself said, light and darkness cannot exist without each other - even with Vaatu defeated, he'll just grow inside Raava and reemerge thousands of years later (and if he'd won, Raava would reemerge the same way). The problem with Vaatu winning is [[EvilOnlyHasToWinOnce that humanity wouldn't be around afterward...]]

* In ''WesternAnimation/DCSuperheroGirls2019'' we learn that Zatanna [[spoiler:inherited both light magic from her father, and dark magic from her mother, which is why her magic gets so unstable when she gets emotional.]]
* {{Deconstructed}} in ''WesternAnimation/HeManAndTheMastersOfTheUniverse2021''. Season 2 reveals that someone can have both [[SentientCosmicForce the Power of Grayskull]] and [[TheDarkSide the Power of Havoc]] inside them. But because the powers are opposing forces, the power given is ''weaker'' than if you held one or the other. [[spoiler:Because the crystal in her helmet is made of Proto-Havoc, Ram Ma'am's connection to Grayskull was always weak compared to her fellow Masters of the Universe. It's both why she never unlocked her [[SignatureMove Master Strike]] and why she doesn't have a [[ArchEnemy Nemesis]]; having both powers makes Krass her ''own'' Nemesis]].
* ''[[WesternAnimation/HotWheelsBattleForce5 Hot Wheels: Battle Force 5]]'': [[spoiler: The Double-Helix Crystals, an artifact created by Sage, are this. She created the Crystals by placing 2 incompatible elements - a red anti-matter crystal and a blue Hadron crystal - in orbit around each other. She used the Crystals to freeze the Red Sentients before sealing them away. In the Season 2 episode “The Crimson One”, the Red Sentient Force seek the Crystals to undo the process, and the Battle Force 5 have to destroy the Crystals. Vert and Stanford manage to do so by [[FusionDance fusing their vehicles]] ''while'' carrying the Crystals, causing the ''Crystals'' to be fused as well. Being incompatible, they become a ''literal'' YinYangBomb that Vert and Stanford use to defeat Krytus.]]

* Joining the opposing [[SolarAndLunar Sundrop and Moonstone]] so that [[TheGoodKingdom Corona]] can be saved from the encroaching black rocks is our heroes' primary goal for much of ''WesternAnimation/TangledTheSeries''. However, given that the Sundrop ''is'' [[LivingMacguffin inside of Rapunzel at the moment]], it might not be such a good idea...[[spoiler: It's not, and [[BigBad Zhan Tiri]] gets to find out firsthand.]]
* In the ''WesternAnimation/YoungJustice2010'' episode "Encounter Upon the Razor's Edge", [[spoiler: [[WesternAnimation/GreenLanternTheAnimatedSeries Razer]], who had been struggling to master his blue ring and find hope and peace for himself after his stint as a Red Lantern, ends up being able to wield both his [[ThePowerOfHate red]] and [[HopeBringer blue]] rings in unison, becoming a hybrid Red/Blue Lantern at peace with himself. His costume even gets split into equal red and blue halves to convey the point]].

* In ''Manhua/TalesOfDemonsAndGods'', one of Nie Li's more powerful demon spirits is the Fanged Panda. While generally decried as weak and useless, much like all of Nie Li's abilities, it's simply got a slow and steady growth... and one of its most powerful abilities is literally called the 'Yin-Yang Bomb', firing two balls of light and dark which combine to hit ''hard''.

* ''Anime/DigimonFrontier'': Light-wielding Koji had to take on Koichi's dark powers to give the team the edge needed against [[FallenAngel Lucemon]], who had learned to combine darkness and light into his ultimate attack.

** [[spoiler:The evil future version of Rogue Cheney is able wield both elements by himself, having killed and devoured the magic of future Sting to do it. And he is more than enough to defeat Natsu at full power. Fittingly, Sting himself gains the ability to use both after the present and good Rogue lets him eat his magic to get a power-up to fight Larcade of the Spriggan 12.]]

* In ''Manga/KenichiTheMightiestDisciple'', there are two types of martial artists; Outward focusing [[TheBerserker Dou]] types that fight aggressively and turn their anger into a source of power, and inward focusing [[TranquilFury Sei]] types, who are calm and calculating and derive their power from inner peace and concentration. And then there is 'Seidou goui', a technique that combines the two for an explosive boost in power but that causes [[HeroicRROD permanent damage to the body]] if used for too long.

** That said, Feruchemy and Allomancy aren't opposites. The opposite of Allomancy is [[spoiler: Hemalurgy, which is of Ruin just as Allomancy is of Preservation, and requires the user to steal power from others. And unlike the other two, it can be used by anyone, including Allomancers.]]

* In ''[[VideoGame/StreetPassMiiPlaza Find Mii 2/Streetpass Quest 2]]'', you can have Miis of the same or similar color shirts team up, like a team of Blue-Blue miis or a team of Blue-Light Blue miis, though miis with the same color shirt are a better team. The exception is a mii wearing a white or black shirt, they can team up with other miis of the same color shirt like White-White or Black-Black, or team up with each other despite wearing opposite colors to form a Black-White team. And while they don't have a Combo Magic command like they would if the team had the same color shirts, their Combo Attack command is the only thing that can break Shadowlight shields, whereas most other shields only require a single mii wearing the required shirt.

** Riku's ending in ''VideoGame/KingdomHeartsChainOfMemories'' and throughout ''358/2 Days'' and ''VideoGame/KingdomHeartsII''. The ending of the latter may have broken this, though; the fans still argue about it. And ''Dream Drop Distance'' just complicates this even more; he retains a lot of his Dark powers, yet explicitly favors the Light (making the fans argue if it's even this or an outright subversion via "DarkIsEvil subdued by LightIsGood").

Of course, sometimes you have an AntiHero, the guy who wields [[CastingAShadow the power of darkness]], [[BadPowersGoodPeople powers himself on negative emotions]], and probably has an [[DarkAndTroubledPast angsty past.]] He probably dresses in all [[DarkIsNotEvil black]], too. In extreme cases, the Dark Hero would like nothing, ''nothing'' better than to wrap his hands around his archnemesis' throat and strangle the life out of him. Think [[VideoGame/{{Boktai}} Sabata]], ComicBook/{{Raven}}, and Franchise/{{Batman}}.

** Arthur becomes an unorthodox example thanks to a series of revelations from Volume 8 onward. After [[spoiler:Sylvie performs a HeroicSacrifice to save him at the climax of the previous volume, his body has become part draconic. He learns in the next volume that thanks to him being able to summon an ancient suit of [[{{Precursors}} Djinn]] PoweredArmor that only they and their descendants can wear, he and his family are descendants of the Djinn. This means in his current form he is a HalfHumanHybrid with dragon and Djinn ancestry. The "Yin Yang" part is that the former committed genocide upon the latter out of jealousy for the latter's ability to control [[ElementNumberFive aether]], which the former believed was exclusively theirs to control. It is worth noting that while as stated above that Sylvie has Vritra blood which in turn would make Arthur part basilisk as well, this has had no bearing in the novel so far. The bottom line being that Arthur now exhibits the same enhanced physiology that both the Indrath and Vritra have as Asuras]].
** The Acclorite that Arthur receives from Wren [[spoiler:eventually manifests as a spectral wolf named Regis, who acts as a FightingSpirit powered by aether and can act as a conduit for the Godrunes that Arthur acquires later on. Of the three disciplines of aether known to the Indrath, Regis specializes in the vivum path. This grants him the capacity for both creation and destruction, as not only can he heal, he can also manifest pure destructive energy should the situation call for it]].

* The Shadow Sun Ninja PrestigeClass in ''TabletopGame/DungeonsAndDragons''. The requirement of the class is a good alignment, despite most of the powers being rather dark in nature, or mixing light/darkness (and hot/cold) for both healing and hurting. This is probably a necessity to not give in too much to the dark side, a definite risk with the peak abilities of the class.

* ''[[WesternAnimation/HotWheelsBattleForce5 Hot Wheels: Battle Force 5]]'': [[spoiler: The Double-Helix Crystals, an artifact created by Sage, are this. She created the Crystals by placing 2 incompatible elements - a red anti-matter crystal and a blue Hadron crystal - in orbit around each other. She used the Crystals to freeze the Red Sentients before stealing them away. In the Season 2 episode “The Crimson One”, the Red Sentient Force seek the Crystals to undo the process, and the Battle Force 5 have to destroy the Crystals. Vert and Stanford manage to do so by fusing their vehicles while carrying the Crystals, causing the Crystals to be fused as well. Being incompatible, they become a ''literal'' YinYangBomb that Vert and Stanford use to defeat Krytus.]]

** In the novel tie-in to ''VideoGame/StarWarsTheOldRepublic'', ''Literature/{{Revan}}'', when [[spoiler:Revan recovers all of his memories and thus his full knowledge of the Dark Side, his most powerful Force technique is to simply gather up as much of both as he can hold... and smash them together. It's enough to knock back an enemy who is fighting with the Dark Side energy of an entire world's population.]]

* ''Literature/TheWheelOfTime'' features [[MutuallyExclusiveMagic Mutually-Exclusive Magic]] of the sort where men and women get their powers from different sources, produce even identical magical effects in completely different ways (most explicitly mentioned when certain people learn how to Travel), and even use ''opposite'' techniques to just ''access'' magic...but the most powerful magical feats, like [[spoiler:the cleansing of ''saidin'']] or [[spoiler:the Bowl of the Winds]], require the use of female and male magic together. The symbol for the union of male and female magic is itself a simplified Yin-Yang. [[spoiler:In the climax of the series, Rand uses both the One Power (good) and the True Power (evil) to seal the Dark One's prison much more effectively than Lews Therin did.]]

* In ''Website/TheCrewOfTheCopperColoredCupids'', it surfaces that the [[ThePowerOfHate hate]]-based magic of the Dark Lords of Shenanig is literally opposed to the love-based magic with which the Clockwork Cherubs' Arrows are imbued. When Lord Nefarious is hit with a Cupid Arrow, instead of being [[GettingSmiliesPaintedOnYourSoul romanticised]], he [[DefeatEqualsExplosion ''explodes'']].

* In ''Literature/TheCrewOfTheCopperColoredCupids'', it surfaces that the [[ThePowerOfHate hate]]-based magic of the Dark Lords of Shenanig is literally opposed to the love-based magic with which the Clockwork Cherubs' Arrows are imbued. When Lord Nefarious is hit with a Cupid Arrow, instead of being [[GettingSmiliesPaintedOnYourSoul romanticised]], he [[DefeatEqualsExplosion ''explodes'']].

* Common theme in the RobinHood ''Series/RobinOfSherwood'' series. Robin and his sword Albion are specifically said by Herne the Hunter to have the "power of light and darkness".

* In ''Manga/FullmetalAlchemist'', Kimblee's prefered attack is this. Each hand has tattooed on its palm a symbol; on his right, there is a symbol that stands for the Sun, fire, and gold, and on his left, one that stands for the Moon, water, and silver. When he joins both symbols, the result is this ''[[StuffBlowingUp literally]]''.

** It is revealed that [[spoiler:Sylvie is the hybrid offspring of both the [[DragonsAreDivine Indrath]] and [[EvilutionaryBiologist Vritra Clans]] through her parents Sylvia and Agrona. This means she has access to the opposing powers of both clans. Amusingly, despite it being revealed that [[GodAndSatanAreBothJerks neither of these clans are better than the other]], Sylvie ends up being the [[WhiteSheep only decent]] [[TokenHeroicOrc living member]] of both clans thanks to her being raised by Arthur away from either of them, making her ultimately a case of BadPowersGoodPeople as well]].
** Arthur becomes an unorthodox example thanks to a series of revelations from Volume 8 onward. After [[spoiler:his bond Sylvie performs a HeroicSacrifice to save him at the climax of the previous volume, his body has become part draconic. He learns in the next volume that thanks to him being able to summon an ancient suit of [[{{Precursors}} Djinn]] PoweredArmor, he and his family are descendants of the Djinn. This means in his current form he is a HalfHumanHybrid with Dragon and Djinn ancestry. The "Yin Yang" part is that the former committed genocide upon the latter out of jealousy for the latter's ability to control [[ElementNumberFive aether]], which the former believed was exclusively theirs to control]].
** In Volume 10, [[spoiler: Chul is introduced as the hybrid offspring of the Djinn and the Asclepuis clan of the phoneix race after they tried to save the Djinn rebelling against Kezess Indrath. Later, after Chul spars with Arthur, Arthur decides to take him as support against Agrona as Chul's mother was captured and later killed by Agrona and the legacy. Chul with Permission from Mordain decides to accompany Arthur as sign of alliance against Agrona Vritra and Kezess Indrath.]]

* The [[MineralMacGuffin Chaos Emeralds]]'s energies in the ''VideoGame/SonicTheHedgehog'' games can become either positive or negative depending on the emotions used to draw them out. ''VideoGame/SonicAdventure'' culminates in the [[TrueFinalBoss epic clash]] between [[EldritchAbomination Perfect Chaos]] (empowered by negative energy) and [[SuperMode Super Sonic]] (empowered by positive energy).

* ''Franchise/SpiderMan'' villain Mister Negative. By day, Martin Li is the kindly, charitable owner of a soup kitchen whose visitors seem to be miraculously cured of their various ailments. By night the color-inverted Mr. Negative is a ruthless gangster who warps Li's charitable works to his own criminal aim (unless it's Li who's covertly redirecting Negative's efforts towards good).

** The 2099 continuity had Xian, who also had the one hand heals/one hand destroys schtick.
** Magik/Illyana Rasputina tried to be an example (we'll see if she's still trying since coming back to life), practicing both dark and light magic. Sometimes she'd combine the two, like when she attempted to heal someone (light magic) while sitting backwards in a pentagram (dark magic). She kept falling to the dark side, though.

* ''Webcomic/OneHundredAndEightyAngel'': In Episode 97, Sam creates and wields [[DualWielding two swords]] during [[spoiler:her fight with Paymon]]; one of light from her halo, and another of darkness from her scythe.

* {{Deconstructed}} in ''WesternAnimation/HeManAndTheMastersOfTheUniverse2021''. Season two reveals that someone can have both [[SentientCosmicForce the Power of Grayskull]] and [[TheDarkSide the Power of Havoc]] inside them. But because the powers are opposing forces, the power given is ''weaker'' than if you held one or the other. [[spoiler:Because the crystal in her helmet is made of Proto-Havoc, Ram Ma'am's connection to Grayskull was always weak compared to her fellow Masters of the Universe. It's both why she never unlocked her [[SignatureMove Master Strike]] and why she doesn't have a [[ArchEnemy Nemesis]]; having both powers makes Krass her ''own'' Nemesis]].

* In ''Franchise/StarWars: VideoGame/TheForceUnleashed'', Starkiller seems to combine Lightside and Darkside techniques in battle.

** For once, an example that doesn't involve Belial: Series/{{Ultraman Trigger|NewGenerationTiga}} was once a giant of darkness before turning to the light. In the final episode, he temporarily reabsorbs his old dark powers and combines them with his newer light-based ones, gaining a new SuperMode called Trigger Truth.