History Main / FieldPowerEffect

** Initially, Nodoka also had a FieldPowerBonus when playing Online, losing significant power when playing in person, but she eventually gained the ability to go into full 'Online Mode' in a live game.

* ''VideoGame/BattleForWesnoth'': Lawful units fight better at day, and chaotic units fight better at night (and both fight worse at the opposite daytime). As well, the Mage of Light unit can illuminate an area with their presence, being a FieldPowerBonus for lawful and a FieldPowerDrain for chaotic units at the same time.

* ''VideoGame/ExitFate'': One of the Demon Commandos possesses a spell permanently buffing up his own party, and the other one has a spell {{Field Power Drain}}ing the enemy party.

** Fire Lord Sozin also decided to [[spoiler: make his ''own'' FieldPowerEffect with a "comet" that drastically powers up Firebending]]. He used it to [[spoiler: wipe out the Air Nomads, [[NiceJobBreakingItHerod except for the one they were looking for]]]], and 100 years later, his descendant, Ozai [[spoiler: tried to burn the whole ''Earth Kingdom'' at the comet's return]].

** Servants become stronger if they're somewhere [[ClapYourHandsIfYouBelieve where their particular legend is well known]]. This is shown in ''LightNovel/FateApocrypha'', which features Vlad Tepes as a Servant in his homeland of Wallachia (modern day Romania). Ordinarily, Vlad would just be an average Servant, but since he was summoned on his home territory, his power is boosted massively, such that he's one of the strongest Servants in the war.

** The [[VideoGame/PokemonDiamondAndPearl Gen IV-exclusive]] Fog lowers Accuracy for all Pokémon, but you can't activate it on your own -- it only occurs if the overworld is foggy. It lingers until the player either gets out of the foggy area or uses Defog.

** Hail hurts all Pokémon that aren't [[AnIcePerson Ice-type]] (or have an ability to make them immune) and makes Blizzard 100% accurate. It also enables the usage of Aurora Veil, which halves damage from all attack types. Auto-invoked by Snow Warning.

** ''VideoGame/PokemonXAndY'' add Terrain moves, which are similar to (And can stack with) weather, but with the restriction that they only affect Pokémon standing on the ground. They are auto invoked by their respective Surge abilities, which were formerly exclusive to the [[VideoGame/PokemonSunAndMoon Tapu]], but have since been given to other Pokémon.

* ''Franchise/{{Splatoon}}'' has this as a core gameplay mechanic. Matches focus on spreading as much ink of the player's own color as possible, and this ink has effects on them: one can quickly swim in in their own team's ink, and doing so quickly refills their ink supply. The opposition's ink, on the other hand, slows the player down to a crawl while also dealing chip damage, making for easy splattering.

* ''VideoGame/FlawedCrystals'': The [[spoiler:Blue Diamond]] fragment of [[BonusBoss the Perfect Crystal]] can use these to debuff the gems' stats or prevent them from generating star points, similar to the EmotionControl effect she displays in canon.

See MookCommander for enemies who have this kind of effect to their troops.

* ''Franchise/{{Pokemon}}'' has Weather Effects that benefit specific types, moves and abilities. It can be on Routes starting from Gen. 3, or you can set it up with respective moves or abilities. Weather abilities lasted indefinitely up to Gen V; weather moves and Gen VI weather abilities only last from five to eight rounds, save for the super abilities Primordial Sea, Desolate Land and Delta Stream, which only cease when the invoker is removed from combat.

** Sand hurts all Pokemon that aren't [[DishingOutDirt Rock, Ground]], [[ExtraOreDinary or Steel-type]] (or have an ability to make them immune). It also gives Rock-types a well appreciated Special Defense boost. Auto-invoked by Sand Stream.
** Hail hurts all Pokemon that aren't [[AnIcePerson Ice-type]] (or have an ability to make them immune) and makes Blizzard 100% accurate. Auto-invoked by Snow Warning.
** Several abilities also have something to do with the above weather effects. They either [[LightningBruiser double their speed]], make them gain HP gradually, or power up their moves.
** Fog which lowers Accuracy, but you can't activate it on your own -- it only occurs according to overlord conditions.
** [[TheCorruption Shadow Sky]] causes gradual damage to all non-Shadow Pokemon. The reverse of Fog; it MUST be manually activated, as Shadow power is unnatural.
** The "Room" series of moves also operate like field effects. Trick Room, introduced in Gen IV, reverses the effect of speed on action order so that slower Pokemon act first. Gen V's Magic Room and Wonder Room respectively nullify the effects of held items and reverse all Pokemon's physical and special defense stats.

*** Grass Pledge + Fire Pledge = fire on the opponent's field, damaging all non-Fire Pokemon.
*** Grass Pledge + Water Pledge = swamp on the opponent's field, reducing the speed of the opposing Pokemon.

** ''VideoGame/PokemonXAndY'' add Terrain moves, which are similar to (And can stack with) weather, but with the restriction that they only affect Pokemon standing on the ground.
*** Grassy Terrain regenerates the HP of Pokemon and powers up Grass type moves.
*** Electric Terrain prevents Pokemon from falling asleep and powers up Electric type moves. Auto-invoked by [[VideoGame/PokemonSunAndMoon Tapu Koko's Electric Surge]].
*** Misty Terrain prevents Pokemon from getting status effects and weakens Dragon type moves.
*** Gen VII introduces Psychic Terrain, which nullifies increased priority moves.

* Myth/KingArthur:
** In some versions, the strength of Sir Gawain and Sir Escanor increases during the morning, is tripled by noon, and then wanes throughout the afternoon.

* ''VideoGame/{{Splatoon}}'' has this as a core gameplay mechanic. Matches focus on spreading as much ink of the player's own color as possible, and this ink has effects on them: On their own team's ink Inklings can quickly swim in it as squids, and doing so quickly refills their ink supply. The opposition's ink, on the other hand, slows Inklings to a crawl, while also leaving them damaged for easy splattering.

* Some of the players in ''Manga/{{Saki}}'' have this. Koromo draws strength from the night and the moon, so she's at her absolute strongest when the finals take place during a full-moon night. Yuuki is strongest during the East Wind, referring to herself as 'The Thunder of The East', while Nanpo Kazue is strongest during the South Wind. (A battle between Yuuki and Kazue has her hang on by a thread during the East Wind, and then make a huge comeback during the South Wind, winning the game by a large margin.) Initially, Nodoka also had a FieldPowerBonus when playing Online, losing significant power when playing in person, but she eventually gained the ability to go into full 'Online Mode' in a live game.
** The most JustForFun/{{egregious}} [[AssPull of them all]] however, is [[spoiler:Shizuno's. The deeper the other players go into the stack, the weaker their gimmicks are]]. This perfectly counters both Awai's and Saki's ability.

* In the ''VideoGame/AgeOfWonders'' games, wizards can cast certain spells that affect an entire battlefield. Examples include Holy Light, which brightens the scenery and buffs Good units and debuffs Evil units, and its Evil counterpart, Unholy Darkness, which does the opposite.
* In ''VideoGame/BattleForWesnoth,'' lawful units fight better at day, and chaotic units fight better at night (and both fight worse at the opposite daytime). As well, the Mage of Light unit can illuminate an area with their presence, being a FieldPowerBonus for lawful and a FieldPowerDrain for chaotic units at the same time.

* One of ''VideoGame/ExitFate's'' Demon Commandos possesses a spell permanently buffing up his own party, and the other one has a spell {{Field Power Drain}}ing the enemy party.
* In ''VisualNovel/FateStayNight'', both Caster and Rider use such effects to absorb energy, although we only see the effects on the field created by Rider, when it drains life power from the students of the school. Also, Ryuudou temple seems to fulfill a similar role, weakening all the servants who enter it ([[InformedAbility or so we are told)]].

* In ''VideoGame/GranblueFantasy'', few characters (and bosses) have skills that can deploy special Field effects to the entire raid, which in turn, affects all players and enemies alike under a specific duration. They are represented as skills with a purple border.

** There's also Fog which lowers Accuracy, but you can't activate it on your own.

** In addition, the "Room" series of moves also operate like field effects. Trick Room, introduced in Gen IV, reverses the effect of speed on action order so that slower Pokemon act first. Gen V's Magic Room and Wonder Room respectively nullify the effects of held items and reverse all Pokemon's physical and special defense stats.

** ''VideoGame/PokemonXAndY'' added Terrain moves, which are similar to (And can stack with) weather, but with the restriction that they only affect Pokemon standing on the ground.

* In ''VideoGame/FinalFantasyTactics'', if a battle takes place during a thunderstorm, [[PlayingWithFire Fire spells]] will be weakened and [[ShockAndAwe Lightning spells]] will be strengthened. It's not that big a deal, though, as very few battles take place in such conditions.
* ''VideoGame/FinalFantasyXII'':
** The weather has an effect on both magick and attacks: If conditions are right, [[FireIceLightning elemental magick]] will be strengthened (e.g., fire magick being stronger on a sunny day), and in bad weather conditions (thunderstorms, snowstorms) the accuracy of ranged weapons will suffer.
** The Mist is a BackgroundMagicField usually appearing in places of power, such as during Esper battles. In places with heavy Mist, you will regenerate MP faster than you would in places without Mist.
** Some boss battles have gimmicks which disable a specific action or otherwise put you at a disadvantage. Your HP or MP may be drained continuously, or the Attack, Magick, Technick, or Item commands may be disabled, or the Charge Time may slow to a crawl if you wield iron-based weapons. These culminate with the battle against Ultima, who will shuffle between these gimmicks once in a while.
* Similarly, in ''VideoGame/FinalFantasyIVTheAfterYears'' the phases of the moon affected combat, increasing or decreasing a pair of stats depending. This meant you combat mages could be very powerful but physical fighters like swordsman would lose half their strength and vice versa.
* In one of the last missions of ''VideoGame/{{Infamous 2}}'' a big thunderstorm appears over the city. The storm allows Cole to recharge his powers by drawing energy from the heavens themselves, making him virtually invincible.
* A prominent aspect of ''VideoGame/TalesOfZestiria''. [[OurAngelsAreDifferent Seraphs]] and [[TheHeartless Hellions]] can generate domains that weaken any member of the opposite species in the area. These last until a stronger domain appears, and they can [[GeniusLoci stretch over entire continents]].
* In the ''VideoGame/TouhouOmenTrilogy'' games, the Land Meter is this. It affects the power of elemental attacks, causes enemies and party members with regeneration in an element to regenerate HP, and can allow or forbid the use of certain spells.
* Starting from world 6, ''VideoGame/ToukenRanbu'' introduces specific battlefield conditions that strengthen or weaken certain types of swords, or enable or disable certain types of troops or horses.

* A core game play element in ''VideoGame/{{Archon}}''. Units fight best (and in particular have the most health) on squares matching their own side. Some squares are permanently light respectively dark, others cycle through several intermediate stages indicated by color. There is even a spell to reverse/invert specifically that cycle.
* ''VideoGame/{{Splatoon}}'' has this as a core gameplay mechanic. Matches focus on spreading as much ink of the player's own color as possible, and this ink has effects on them: On their own team's ink Inklings can quickly swim in it as squids, and doing so quickly refills their ink supply. The opposition's ink, on the other hand, slows Inklings to a crawl, while also leaving them damaged for easy splattering.
* In ''Videogame/{{Evolve}}'' several both have abilities that make areas deadly to traverse. Gorgon's acid spray coats the ground and will destroy the health of anyone exposed to it for too long. Behemoth's lava bomb sticks to any surface and inflicts a burn DOT on anyone who gets too close, which stacks with the damage it does itself.
* In ''Steven Universe'' fangame ''VideoGame/FlawedCrystals'', the [[spoiler:Blue Diamond]] fragment of [[BonusBoss the Perfect Crystal]] can use these to debuff the gems' stats or prevent them from generating star points, similar to the EmotionControl effect she displays in canon.

[[folder:Web Comics]]

* During the Black Moon arc of ''Anime/SailorMoon'', she was subjected to a variable gravity field onboard the villain's ship. She managed to pull off HeroicResolve and save her friends, standing (despite his increasing the gravity on her) and attacking him.
* Flazzard in ''Manga/DragonQuestTheAdventureOfDai'' uses this as his primary tactic when invading. He has his troops create a tower of fire and one of ice, so that the ground in a circle around the middle of these two towers acts as a power depletion field for his foes, reducing their strength to a fifth, and sealing all use of magic. It is so bad that the heroes have to first find a way around it before fighting the Blizzblaze General.
* Some of the players in ''Manga/{{Saki}}'' are like that. Koromo draws strength from the night and the moon, so she's at her absolute strongest when the finals take place during a full-moon night. Yuuki is strongest during the East Wind, referring to herself as 'The Thunder of The East', while Nanpo Kazue is strongest during the South Wind. (A battle between Yuuki and Kazue has her hang on by a thread during the East Wind, and then make a huge comeback during the South Wind, winning the game by a large margin.) Initially, Nodoka also had a FieldPowerBonus when playing Online, losing significant power when playing in person, but she eventually gained the ability to go into full 'Online Mode' in a live game, though it usually takes her a while...

** Saki herself has several points to this as well, such as finishing with her signature ''Rinshan Kaihou'', literally meaning 'A Flower Blooms On a Ridge' (go check what the terms mean somewhere else), would show a flower field around her.

** In some versions of the legends, Sir Gawain's strength increases during the morning, is three times his normal strength by noon, and then wanes through the afternoon.
** Another knight, Escanor also has the same ability. He was killed by Gawain though.

* This is the point of Nexus cards in ''TabletopGame/BattleSpirits''

* ''TabletopGame/{{Warhammer}}'': The [[BackgroundMagicField Winds of Magic]] fluctuate in strength over space and time, so spellcasters can find areas where their chance of successfully casting any given spell are improved or penalized. However, strong Winds can also boost their chance of a MagicMisfire.
* Sort of present in ''TabletopGame/Gloomhaven'', as certain character abilities can temporarily "activate" elements that can be used by some other character abilities to add new effects to said abilities, generally making them stronger.

* ''VideoGame/DoomEternal'''s Buff Totems amplify the speed and damage of all nearby demons until they're destroyed, in a manner akin to the [[MookCommander Archvile]]. This makes them very high-priority targets, as even the weakest {{Mook}} can quickly turn the player into sushi while under the effect of one of these, and that's saying nothing of the bigger fellas.

* Flazzard in ''Manga/DaiNoDaibouken'' uses this as his primary tactic when invading. He has his troops create a tower of fire and one of ice, so that the ground in a circle around the middle of these two towers acts as a power depletion field for his foes, reducing their strength to a fifth, and sealing all use of magic. It is so bad that the heroes have to first find a way around it before fighting the Blizzblaze General.

* The weather in ''VideoGame/FinalFantasyXII'' had an effect on both magic and attacks: If conditions were right, [[FireIceLightning elemental magic]] was strengthened (e.g., fire magic being stronger on a sunny day), and in bad weather conditions (thunderstorms, snowstorms) the accuracy of ranged weapons suffered.

* ''[[TabletopGame/GeistTheSinEaters Geist]]'' has the Boneyard Manifestation. A Sin-Eater using it is aware of everything within the area encompassed and can perform subtle manipulations to impose penalties or inflict damage on entities inside it, depending on the Key used. They can also remotely use other Manifestations within the Boneyard. And at maximum level the Boneyard's radius is measured in ''miles''.
* The whole point of Field Spell Cards in TabletopGame/YuGiOh, at least in early metagames, is this. With newer cards, Field Spell Cards start to do less archetypical effects. In any case however, the fact that [=FSCs=] affect both players' field can mean that whatever its effects are, it can also be used by a smart opponent.

* ''VideoGame/DoomEternal'''s Archvile and Buff Totems amplify the speed and damage of all nearby demons until they're destroyed. This makes them very high-priority targets, as even the weakest {{Mook}} can quickly turn the player into sushi while under the effect of one of these, and that's saying nothing of the bigger fellas.

A Field Power Effect is a spell or environmental condition that affects the fighting ability of one or more characters, strengthening and/or weakening them. {{Weather|OfWar}} and terrain may play a factor, such as a [[PlayingWithFire pyrokinetic]] being weak during a rainstorm while an [[MakingASplash aquakinetic]] gains more power. Or a [[ThePowerOfTheSun solar powered]] hero being strongest at noon and weakest when in pitch black darkness. Terrain like the PlaceOfPower affect characters atuned to the type of energy it boosts (and its opposite). You can probably tell that due to ElementalRockPaperScissors, any Field Power Effect that boosts one set of ElementalPowers will weaken whatever is in its opposition. This is similar to how opposing sides with the ability to use StatusBuff and StatusBuffDispel can also end up canceling each other out. Other possibilities include things like time of day, year, or even the positions of planets and stars.

* Similarly, in ''VideoGame/FinalFantasy4TheAfterYears'' the phases of the moon affected combat, increasing or decreasing a pair of stats depending. This meant you combat mages could be very powerful but physical fighters like swordsman would lose half their strength and vice versa.