[[quoteright:300:http://static.tvtropes.org/pmwiki/pub/images/emerald_power_9592.jpg]]
[[caption-width-right:300:Notice a pattern here?[[labelnote:Source]]Clockwise, from top left: [[Comicbook/GreenLantern The Green Lantern Ring]], [[Franchise/SuperMarioBros a 1-up mushroom]], a person wearing Film/TheMask, Comicbook/TheIncredibleHulk.[[/labelnote]]]]

For some reason, [[color:green:the color green]] is associated with mystical/mysterious powers. In fiction, it's translated by the ArtifactOfDoom or the phlebotium glowing green or being made of emerald. Sometimes, a character ''himself'' is this if his green skin is a distinctive feature.

Possibly due to the fact that normally nothing gives off green or purple light except from artificial sources. Natural incandescent light (such as flame) is red, orange, yellow, white or more rarely blue.

This trope is also why GreenRocks are named so, even though the trope does not require the color.

A SisterTrope to SicklyGreenGlow (sub-trope for when the green thing is evil or scary), SupernaturalIsPurple.
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!Examples

[[foldercontrol]]

[[folder:General]]
* Depicting willpower or courage as a green energy is quite popular:
** The GreenLantern Corps, obviously. Though as of the 2000s their power has been established as only one of several, though it is the most balanced.
** ''GurrenLagann'''s mechas and even their pilots turn green when they fight seriously.
** Same for ''Anime/GaoGaiGar''.
** Getter Rays from ''Manga/GetterRobo'' are also green.
** ''Franchise/TheLegendOfZelda'': Link, The Triforce of Courage and the Goddess of Courage Farore are represented by Green.
* Radioactive stuff almost always glow green, too.
* A bag of money in any media is usually full of green dollars. And money ''is'' a power.
* A witch brew is almost always green - if not the witch herself.
[[/folder]]

[[folder:Anime and Manga]]
* {{Averted|Trope}} with Jingoro Amayo from ''Manga/{{Basilisk}}'': he is green skinned and possess abilities, but his supernatural power (being a slugman) is probably the lamest in the series.
* [[CodeGeass C.C.]] is an "immortal witch" with long, green hair.
* ''DGrayMan'': the Innocences glow green, with Allen's leaking green light in its first, weaker stages.
* While a [[Anime/DragonBallZ Super Saiyan]] glow is usually yellow, Broly has a green one. It loses some of the green tint once he gets rid of his father's mind control device, but his signature ki attacks remain bright green.
** Also, both the Earth's God and DragonBall final boss, Satan, are Namekians.
* In ''Manga/FairyTail'', Zero, [[spoiler: Brain's SuperpoweredEvilSide,]] uses green colored Dark Magic.
* ''GaoGaiGar'' G-Stone, which translate ''raw courage'' into energy.
* Sacred Gears in ''HighSchoolDxD'' glow green when activated.
* In ''VideoGame/SengokuBasara'', Mitsuhide has a SicklyGreenGlow BattleAura. Considering that [[spoiler:he survived afer being left in a burning temple to die and that he also tries to resurrect his former master Nobunaga with a dark ritual,]] we can see something "mystical" in it.
* In ''Manga/NurseAngelRirikaSOS'', Nurse Angel's power source is the ''Green'' Vaccine, so her attacks often take this color...with the alternative being pink. She does fire off a lot of pink energy too.
[[/folder]]

[[folder:Film]]
* ''WesternAnimation/MonstersVsAliens''' phlebotium, quantonium. It turns Susan into a fifty foot tall woman.
* [[StarWars The Death Star]] beam is green. Also, [[TheMentor Yoda]].
* The army of the dead in the ''LordOfTheRings'' movies is made of greenish ghosts.
** Similarly, the ghosts in ''ComicBook{{Asterix}} and the Twelve Tasks'' are greenish
* [[Film/HarryPotter Avada Kedavra]].
* Film/TheMask.
* Film/{{Flubber}} is an emerald-green blob which doesn't care about gravity. At all.
* In ''Film/CrouchingTigerHiddenDragon'', the Green Destiny sword.
* [[Film/HowToTrainYourDragon The Green Death]].
* The DisintegratorRay in ''MarsAttacks'' leaves nothing but its victims' bright green skeleton.
* ''WesternAnimation/HeavyMetal''. The ArcVillain of the various episodes of the movie is the Loc-Nar, AKA the "Sum of All Evils". It gives off a green glow whenever it exerts its power.
[[/folder]]

[[folder:Comics]]
* [[Franchise/{{Superman}} Kryptonite]].
* Both TheIncredibleHulk and SheHulk are green. And they're ''indeed'' powerful.
* MartianManhunter. A simple glance at him tells you he's just as strong as Superman.
* The original ComicBook/GreenLantern, Alan Scott, could shape and control magic green fire. The book was later rebooted with a sci-fi premise, but still qualified as the Lanterns wielded green alien energy. It was only in the 2000s when Lanterns wielding similar energies of other colors emerged, dropping out of this trope by making green not particularly special.
** Alan Scott's daughter Jade has an internalized version of his powers, plus green skin (and though she has traveled in space, she is not a GreenSkinnedSpaceBabe).
* TheSpectre, God's spirit of vengeance on Earth, wears a green robe and frequently uses green flames with his powers.
* The phrase "Magic is green" is used to refer to Matt Wagner's ''[[MageTheHeroDiscovered Mage]]'' comic book, as that color is used for the effects of the wizard character.
* The Emerald Empress, a ''ComicBook/LegionOfSuperHeroes'' villainess.
[[/folder]]

[[folder:Literature]]
* '''Magyk''' in ''Literature/SeptimusHeap'' is natural and symbolized by green, and Wizards have GreenEyes.
* The Warlock Lord from ''TheSwordOfShannara'' is a wraith made of eerie green mist.
* Arya from the ''Literature/InheritanceCycle''. Her magic color is green, her eyes are green, (hell, anything associated with her is green) and she is probably one of the most badass characters in the series.
* Akhor/Varien's soulgem in ''Literature/TalesOfKolmar'' is green. As a great silver dragon he's got [[OurDragonsAreDifferent some psychic powers]]. As a [[HumanityEnsues human]] he loses them unless he's holding his soulgem against his forehead. It's also used to [[spoiler: awaken the Lesser Kindred and restore the Lost]] later in the series.
* In the ''ChroniclesOfThomasCovenant'', power associated with [[GodOfEvil Lord Foul]] and [[ArtifactOfDoom the Illearth Stone]] usually manifests as noxious green light. In the third book while his power is ascendant, Foul ''turns the moon green'', apparently [[ForTheEvulz just because he can]].
* Subversion in TheWonderfulWizardOfOz - the green, enchanted glow of the Emerald City is merely tinted glasses and parlor tricks.
[[/folder]]

[[folder:Live-Action TV]]
* Promicin, the luminous green neurotransmitter from ''Series/TheFortyFourHundred''.
* The tip of the Eleventh Doctor's [[Series/DoctorWho sonic screwdriver]] glows green. The one used by Nine and Ten was blue.
* Lorne in ''Series/{{Angel}}''...he was an empath who could tell the future when other characters sang, and he was also a green-skinned demon.
* The Green Ranger of ''MightyMorphinPowerRangers'' is the most powerful one. (Generally doesn't apply to following series, though, where their Green Rangers are just one of the team.)
* The Emerald of the Eclipse in ''{{Series/TinMan}}'', which appears to be a magicical or magic-focusing artifact strong enough to stop planetary rotation.
[[/folder]]

[[folder:Tabletop Games]]
* ''TabletopGame/{{Exalted}}'': Green is the color of {{Hell}}, for it's drenched in the light of Ligier. Ligier is a green sun who is also the heart of Malfeas, the King of Yozis and the Demon City itself. Appropriately enough, Hell's chosens are called Green Sun Princes. They have access to OneWingedAngel form in which they turn into green-colored walking nuclear wasteland.
[[/folder]]

[[folder:Theatre]]
* In ''Theatre/{{Wicked}}'', the green-skinned Elphaba has immense magical power. [[spoiler: And she just happens to be a HalfHumanHybrid, too.]]
[[/folder]]

[[folder:Video Games]]
* Green mushrooms in the ''Franchise/SuperMarioBros'' series will give you an [[VideoGameLives extra life.]]
* Tiberium from the ''VideoGame/CommandAndConquer'' series is the most valuable substance in the world (leading to the GDI and Nod fighting over it) and will either kill or mutate anybody who steps in it.
* The Chaos Emeralds from ''Franchise/SonicTheHedgehog'' are a bit of a subversion as they're not ''all'' green. They're still the strongest phlebotinum in the universe. The Master Emerald, however, ''is'' actually green.
* The soul in ''Franchise/MortalKombat'' is represented as a green energy, which allows character enhance their attacks, conjure spiritual weapons, and empower with the souls of fallen people.
* Life Crystals in ''VideoGame/TheDig''.
* More than once in ''Final Fantasy'':
** Magicite in ''VideoGame/FinalFantasyVI'' are the green gems left behind by deceased espers.
** [[TheLifestream Mako energy]], from ''VideoGame/FinalFantasyVII''.
* ''VideoGame/PokemonRubyAndSapphire'': No matter which version you own, the strongest OlympusMons you can catch is Rayquaza, the green dragon. And it's the mascot of the enhanced third version, ''Pokémon Emerald''.
* ''LeagueOfLegends'': [[EldritchAbomination Chogath]]'s eyes, the anubite Nasus and the undead Sion glow green in their artworks.
* In ''VideoGame/BlazBlueContinuumShift'', Hazama's [[SNKBoss Unlimited form]] is surrounded by a green life-stealing aura.
* [[VideoGame/HalfLife The Vortigaunts]] attack with some kind of green lightning. In the multiplayer game ''Half-Life 2: Deathmatch'', it's a OneHitKO.
* In ''VideoGame/{{Minecraft}}'', [[DemonicSpiders the exploding Creepers]] are green.
* While most fighters in the ''VideoGame/{{Tekken}}'' series are normal humans fighting barehanded, Yoshimitsu is a green alien-robot-ninja fighting with a green laser sword.
* The alien artifacts in ''DarkstarOne'' that you use to upgrade your ship look like giant green crystals.
[[/folder]]

[[folder:Webcomics]]
* ''Webcomic/{{Homestuck}}'': the near-omnipotent First Guardians are powered by the [[color:green:Green Sun]]. Use of their powers is associated with the color green, and occasionally they themselves flash green.
** [[HumanoidAbomination Lord English]] and his gang The Felt are also associated with green, in part due to their connection with the game of pool.
* ''Webcomic/{{Zoophobia}}'': Zill's powers glow an incandescent green.
* In ''Webcomic/TheOrderOfTheStick'', Roy's sword glows green after it is reforged with starmetal.
* In ''Webcomic/ElGoonishShive'', the [[http://www.egscomics.com/?date=2008-05-28 Dewitchery Diamond is green]].
* In ''Webcomic/TheOnlyHalfSaga'', magic used by witches and warlocks glows the classic eerie green, which stands out nicely over the often desaturated browns and grays that fill the comic's desert setting.
[[/folder]]

[[folder:Western Animation]]
* ''WesternAnimation/DannyPhantom'': The [[PhantomZone Ghost Zone]] is generally green-colored, and the protagonist himself has GreenEyes and [[AlienBlood green blood]] in ghost form and shoots green blast of ectoplasmic energy.
* The Flying Dutchman and his boat in ''WesternAnimation/SpongebobSquarepants''.
* The Omnitrix of ''WesternAnimation/{{Ben 10}}'' gives off a bright green glow whenever it does anything particularly powerful, and Ben's transformations happens in a flash of green light. The Trope only increased as the story goes on: starting with ''WesternAnimation/Ben10AlienForce'', the Omnitrix becomes green itself, the alien forms have green eyes, Ben himself dress in green (and so do his alien forms starting with Ben10Omniverse) and it's eventually revealed his favourite color ''is'' green (like we didn't guess). He could generally rival Green Lantern at this point.
** Green is also the favorite color of Azmuth, the supergenius creator of the Omnitrix among other inventions.
* The Power Primate from ''WesternAnimation/SuperRobotMonkeyTeamHyperforceGo'' is normally manifested as green energy -- in more extreme cases, it takes the form of a giant green energy gorilla.
[[/folder]]
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