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{{Status|Canon}}
{{Era|H2|H3}}
{{Disambig header|the explosive container|fusion cores in general|Fusion reactor}}
[[File:HINF FusionCoils.png|thumb|300px|Four types of fusion coils.]]
A '''fusion coil''', also known as a '''fusion core''',{{Ref/Site|Id=bwu-12345|URL=http://halo.bungie.net/News/content.aspx?type=topnews&cid=12345|Site=Bungie.net|Page=Bungie Weekly Update 04/06/2007|D=7|M=2|Y=2021}} is a container used for storing and transporting raw power.{{Ref/Book|Id=enc22|Enc22|Page=440}} Fusion coils are used universally across multiple factions; different variants of the fusion coil have been manufactured by the [[UNSC]],{{Ref/Reuse|bwu-12345}} the [[Banished]],{{Ref/Reuse|enc22}} and even the [[Forerunners]].{{Ref/Game|Id=HINF|HINF|gameplay}} They can be used to power weapons and vehicles.{{Ref/Reuse|enc22}} Although fusion coils are used to store plasma, the [[Covenant]] made use of a similar technology with their [[Plasma battery|plasma batteries]].


==Known types==
[[Image:Evolution_of_Fusion_Core_copy.jpg|right|300px|thumb|Shown above is the evolution of the fusion core. Note that the technology was not present in ''[[Halo: Combat Evolved]]''.]]
All known variants of fusion coil are in the shape of a rectangular prism. They each consist of a metallic outer casing to protect the volatile materials within. The contained materials can usually be seen glowing from within the fusion coils, and the glow becomes more intense as the coil becomes more damaged.
===UNSC fusion coil===
This variant of fusion coil was developed by the [[United Nations Space Command]] to transport and store compressed [[plasma|superheated plasma]]. The container is made primarily out of glass and aluminum.{{Ref/Reuse|bwu-12345}} One variant is colored matte brown, overlaid with what appears to be austere gold circuitry on the surface.{{Ref/Game|Id=H2|H2|gameplay}} A second variant is metal frame holding an amber, darkly-glowing, cylindrical object. When slightly damaged, the internal coil glows a warning red; when heavily damaged, it glows bright white. Stickers on the frame warn of radioactivity and high voltage. It emits a loud humming noise constantly.{{Ref/Game|Id=H3|H3|gameplay}}{{Ref/Game|Id=HR|HR|gameplay}}{{Ref/Game|Id=H4|H4|gameplay}}


<gallery>
The '''Fusion Core''' is a [[United Nations Space Command]] ground container for compressed [[plasma]]<ref>http://www.bungie.net/News/content.aspx?type=topnews&cid=12345</ref>.
File:H2-UNSCFusionCores.jpg|Two UNSC fusion coils.
==Operation==
File:H3-FusionCore.png|Another variation of UNSC fusion coil.
The Fusion Core is the "safest, most intelligent way to transport and store highly explosive compressed plasma energy". It has been confirmed from the "necessary warning signage" on the ''Halo 3''-era cores that there is high voltage and radioactivity present within a fusion core. Formerly, there was speculation that the actual core was a highly volatile radioactive power source for UNSC ground operations, although this has been disproved by Bungie.
</gallery>


===Blast coil===
The Fusion Core may be related to the also UNSC [[Deuterium Fusion Core]], although this hasn't been confirmed.
The blast coil is a variant of fusion coil developed and used by the [[Banished]]. It contains a highly explosive material that emits a yellow glow. When detonated, the coil delivers a powerful localized blast.
<gallery>
File:HINF BlastCoils.png|Two blast coils within a Banished base on [[Installation 07]].
File:HINF BoomBoxes.png|Small and large variations of the blast coil.
</gallery>


===Plasma coil===
==Aesthetics==
The plasma coil is a variant of fusion coil developed and used by the Banished to hold [[plasma]], in a similar fashion to [[Covenant]] [[plasma battery|plasma batteries]]. When detonated, the plasma coil leaves a pool of burning plasma behind.
===''[[Halo 2]]''===
<gallery>
File:HINF PlasmaCoilNormal.png|A plasma coil at [[Outpost Tremonius (location)|Outpost Tremonius]].
File:HINF PunishedPlasma.png|A plasma coil after receiving damage. Notice the more intense glow.
File:HINF PlasmaCoil.png|Small and large variations of the plasma coil.
</gallery>


===Shock coil===
[[Image:Boom_Core_copy.jpg|right|300px|thumb|Pictures of fusion cores in ''[[Halo 3]]''. The left is normal, the middle is slightly damaged, and the right is exploding.]]
The shock coil is a variant of fusion coil developed and used by the Banished for powering [[voltaic weaponry|their voltaic weapons]]. It contains electricity and emits a strobing blue light. When detonated, the shock coil emits large amounts of electricity that can arc toward nearby objects. It can also have the effect of an [[electromagnetic pulse]] on vehicles and other electronic devices.
Fusion Cores are explosive objects matte brown in color and rectangular in shape overlaid with what appears to be austere gold circuitry on the surface.  
<gallery>
===''[[Halo 3]]''===
File:HINF ShockCoil.png|A shock coil at a UNSC [[Forward Operating Base]] captured by the Banished.
[[Image:Boom_Goes_the_'Hog_copy.jpg|right|200px|thumb|A ''Halo 3''-era [[Warthog]] on top of a massive pile of fusion cores, awaiting its flight commonly known as the "Warthog Jump".]]
File:HINF ShockCoils.png|Both sizes of shock coil next to each other.
In ''Halo 3'', the Fusion Core has been graphically redesigned. The actual plasma core appears to be an amber darkly-glowing cylindrical object within a metallic-gray color frame. When slightly damaged, the internal core glows a warning red. Stickers on the frame warn of radioactivity and high voltage.
</gallery>
==Pyrotechnics==


===Hardlight coil===
[[Image:Fusion Core Decal.jpg|200px|thumb|a decal as seen on top of  a Fusion Core]]
The hardlight coil is a variant of fusion coil developed by the [[Forerunners]]. It contains purple [[hardlight]] energy that swirls violently within its casing. When detonated, the hardlight escapes, bouncing off of solid objects and disintegrating any organic material it comes into contact with, much like the hardlight projectiles fired by the [[Heatwave]].
Several shots can detonate these volatile cores, often exploding with sufficient force to severely wound or kill a nearby [[Sangheili]] or [[SPARTAN-II]]. The explosion is a bloom of pink superheated gas and sparks.  
<gallery>
File:HINF HardlightCoil.png|A hardlight coil.
File:HINF HardlightCores.png|Two hardlight coils within a Forerunner [[Beacon tower]].
File:HINF BigHardlightCoil.png|The larger variation of hardlight coil.
</gallery>


==In-game information==
In multiplayer, players often may attempt to lay an ambush for a hostile near a core by rolling a [[Fragmentation Grenade]] towards the core when the enemy forays near. Alternatively, they can be pushed from above onto passing enemies, exploding on impact with the ground (sometimes a shot is needed to blow it up if from low heights) or used as an antivehicular land mine (sometimes with more than one Fusion Core) at vehicle choke points.
Several shots from any weapon can detonate a fusion coil. In [[multiplayer]], players often may attempt to lay an ambush for a hostile near a coil by tossing a [[M9 High-Explosive Dual-Purpose Grenade|fragmentation grenade]] towards the coil when the enemy forays near. Alternatively, they can be pushed from above onto passing enemies, exploding on impact with the ground, or used as anti-vehicle landmines at vehicle choke points. They have also been used for [[explosive jumping]] and in [[Forge]] to create [[Forge/Tricks#Instant Respawn|perpetual explosions]].


In ''[[Halo 2: Anniversary]]''{{'}}s Forge, there is an EMP variant of the fusion coil, much like how there is an EMP variant of the [[landmine]].
==Appearances==
===''[[Halo 2]]''===
Fusion Cores can be found on six ''[[Halo 2]]'' [[multiplayer]] maps: ''[[Foundation (Level)|Foundation]]'', ''[[Headlong (Level)|Headlong]]'', ''[[Ivory Tower (Level)|Ivory Tower]]'', ''[[Tombstone (Level) |Tombstone]]'' , ''[[Zanzibar (Level)|Zanzibar]]'' and ''[[Waterworks (Level) |Waterworks]]'', although they are not seen in the campaign.


In ''[[Halo Infinite]]'', the smaller variation of fusion coils can be picked up and thrown by the player, as well as by enemy [[Jiralhanae]]. Like other items that can be held by the player, fusion coils can be picked up from a distance using the [[Grappleshot]]. In multiplayer, hitting an enemy Spartan directly with the fusion coil will kill them instantly. Killing an opponent in multiplayer with a thrown fusion coil will earn the player the [[Kong]] medal. Larger fusion coils are stationary, but have much more damaging effects when detonated.  
===''[[Halo 3]]''===
Fusion Cores were spotted in the ''[[Halo 3 Beta]]'' in the multiplayer maps ''[[High Ground]]'' and ''[[Valhalla]]'', and appear in further multiplayer maps in the actual game, including its campaign debut in the level [[Crow's Nest (Level)|Crow's Nest]].


Each variant of fusion coil in ''Halo Infinite'' performs differently:
However, Fusion Cores feature prominently in the [[Forge]] multiplayer map editor, where players can place a large amount of cores on any location in a map and detonate them. In a recent Bungie Weekly Update, a ''Halo 3'' tester was able to place a "ridiculous" number of exploding cores in a [[Elephant]] vehicle, and set the core respawn timer so that as a core exploded, it would respawn and detonate again almost instantaneously, making the vehicle "[flip] around at incredible speeds and [tumble] all over the [[Sandtrap|map]], releasing exploding cores and the occasional vehicle like some kind of satanic piñata."<ref>http://www.bungie.net/News/content.aspx?type=topnews&cid=12685</ref>.
*Blast coils deal kinetic damage in a large area. Large blast coils have an even larger area of effect.
*Plasma coils are effective against shields and leave a damaging field on the ground, similar to a [[Veporokk Workshop Ravager]]'s charged shot. Large plasma coils spew plasma in an area before exploding and releasing their fragments, that leave the aforementioned damaging field.
*Shock coils deal shock damage and have an [[EMP]] effect on vehicles. Large coils will spew electricity for a long time when damaged until they explode.
*Hardlight coils deal hardlight damage and release bouncing projectiles on explosion, like those fired by the Heatwave. Large coils burst in even more projectiles.


==Production notes==
Fusion cores are to be featured in "mysterious" and "important" ways in ''Halo 3'' as well.
*A Bungie Weekly Update described an incident where a beta tester used them, along with the [[Forge/Tricks#Instant Respawn|Instant Respawn]] trick, to [[Elephant flipping|turn an Elephant into a "satanic piñata"]] on the ''Halo 3'' map [[Sandtrap]].{{Ref/Site|Id=bwu-12685|URL=http://halo.bungie.net/News/content.aspx?type=topnews&cid=12685|Site=Bungie.net|Page=Bungie Weekly Update 08/03/2007|D=24|M=12|Y=2013}}
*When saving a map variant in ''Halo 3''{{'}}s Forge, a brief "Terms of Use" agreement is shown. In the agreement, [[Bungie]] jokingly references the temptation to exploit these items, adding: "...And try not to build ''all'' your structures out of fusion coils."{{citation needed}}
*In the [[Halo 3 manual|''Halo 3'' manual]], under "The Forge" section, it references "Cooperate with your friends to make the work go faster, But don't forget to throw a fusion coil at them from time to time."


==Gallery==
==Related Links==
{{Linkbox|gallery=yes|gallerypage=Images of fusion coils}}
*[[Plasma Battery]]
<gallery>
*[[Power Core]]
File:Evolution of Fusion Core copy.jpg|The evolution of the UNSC fusion coil. Note that this item was not present in ''[[Halo: Combat Evolved]]''.
File:UNSCFusionCoresHistory-RefChart.jpg|Reference chart comparing between ''Halo 2'', ''Halo 3'', ''Halo: Reach'', and ''Halo 4''. Not to scale.
File:Boom_Core_copy.jpg|Sequence image showing the ''Halo 3'' fusion coil's phases from damaged state to exploding state.
File:Fusion Core Decal.jpg|A radioactivity warning on the top of a UNSC fusion coil.
File:HReach-FusionCore.png|A fusion coil in a stable state in ''Halo: Reach''.
File:H4-UNSCFusionCore-Front.png|A fusion coil in ''Halo 4''.
File:HINF Concept FusionCoils.jpg|Concept art of UNSC, Forerunner, and Banished fusion coils for ''Halo Infinite''.
File:HINF Concept PlasmaCoil.jpg|Concept art of a plasma coil for ''Halo Infinite''.
File:HINF XGS2020 Grappleshot Fusion Core.png|John-117 using his Grappleshot to pick up a blast coil in the ''[[Halo Infinite Campaign Gameplay Premiere]]''.
File:HINF Achievement WaitICanThrowThose.png|An achievement image in ''Halo Infinite'' featuring [[John-117]] throwing a blast coil.
File:HINF BlastCoilPrimed.png|A damaged blast coil about to detonate in ''Halo Infinite''.
File:HINF ShockCoilPrimed.png|A damaged shock coil about to detonate in ''Halo Infinite''.
File:HINF HardlightCoilPrimed.png|A damaged hardlight coil about to detonate in ''Halo Infinite''.
File:HINF plasma coil explosion.png|A thrown plasma coil explodes in ''Halo Infinite''.
File:HINF-CoilHUD.png|HUD of the fusion coil in ''Halo Infinite''.
File:HINF-ForestWinner.png|A player with a fusion coil stance in ''Halo Infinite''.
File:HINF-OhNO.png|A [[MENACHITE-class Mjolnir|Menachite]]-clad Spartan-IV prepares to throw a fusion coil at an [[Unggoy Conscript]].
</gallery>


==List of appearances==
== References ==
*''[[Halo 2]]'' {{1st}}
*''[[Halo 3]]''
*''[[Halo 3: ODST]]''
*''[[Halo: Reach]]''
*''[[Halo 4]]''
*''[[Halo 2: Anniversary]]''
*''[[Halo 5: Guardians]]''
*''[[Halo Infinite]]''
*''[[Halo: The Television Series]]''


==Sources==
<references/>
{{Ref/Sources}}


==See also==
 
*[[Plasma battery]]
[[Category:Technology]]
*[[Power core]]
 
*[[Gas container]]
[[Category:UNSC]]
[[Category:Power generation]]
[[Category:UNSC technology]]
[[Category:Banished technology]]
[[Category:Forerunner technology]]

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