[[quoteright:300:[[StarWars http://static.tvtropes.org/pmwiki/pub/images/Superlaser_9831.png]]]]
[[caption-width-right:300:''Fire at will, Commander!'']]

This is a heavy weapon which contains multiple smaller devices that send out a stream, beam, blast, etc.. Those all converge into a single stream, beam, blast, etc., that is more powerful than the sum of its parts.

Usually, the resulting stream goes in the logical direction -- that is, in the direction produced by taking the average of the directions of the intersecting beams (although more advanced versions are able to [[{{Roboteching}} swivel]] in any direction).

Besides RuleOfCool, this kind of weapon has grounding in conceptual mathematics. If lasers could add in the way vectors do, the result would be a laser of many times more magnitude than if it were simply fired from a single barrel (that is, the resultant beam travels several times faster than the speed of light). Fortunately for unexploded planets everywhere, this is not the case.

The inversion of this trope, where one attack splits into many, is RecursiveAmmo or SpreadShot.

Compare AllYourPowersCombined, {{Roboteching}}, WaveMotionGun. Not to be confused with CrossingTheStreams.
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!!Examples:
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[[folder: Anime and Manga ]]

* The "Dark Star Weapons" in ''[[{{Slayers}} Slayers Try]]'' function in this manner. At the end of the season, all five weapons are combined with a YinYangBomb into a WaveMotionGun.
* The "Precure Marble Screw" attack from ''FutariWaPrettyCure'' is like this.
* Used in ''RebuildOfEvangelion'' as Unit 1 fires the [[{{BFG}} Positron Rifle]] at Ramiel.
* The ''TransformersEnergon'' incarnation of Optimus Prime can normally fire {{Roboteching}} BeamSpam. When combined with Wing Saber he can perform a CombinationAttack with the {{Attack Drone}}s which would normally form the limbs of his SuperMode - "Meteor Attack Mode" consists of him firing a ChestBlaster at the same time as the normal beams, which absorbs them to create a massive stream of plasma.
* Although it was only used twice, in ''LegendOfTheGalacticHeroes'' the ships of a fleet can fire all their lasers in a "pinpoint attack" that spawns a super-beam that can decimate bunched-together ships.
** There's also the Thor Hammer.

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[[folder: Film ]]

* The [[ThatsNoMoon Death Star]] in ''StarWars'' may be the TropeCodifier, if not the TropeMaker.
** Parodied [[http://www.youtube.com/watch?v=eyMWHEpoR8s here]].
** The clones' helicopter gunship analogues were later shown with a turret-mounted weapon that worked similarly.
* ''Film/ReignOfFire'': The dragons produce two chemicals in their body that are exhaled and combine to produce their fire; [[TruthInTelevision there is an actual animal that does]] [[http://en.wikipedia.org/wiki/Bombardier_Beetle exactly that]].
* ''Film/{{Ghostbusters}}'': [="=][[ForbiddenChekhovsGun Do not cross the streams.]][="=] But they end up doing just that. And they don't cross, they, well, converge, [[YouShouldKnowThisAlready hence why they're here.]]
* The motherships' primary weapon in ''Film/IndependenceDay''.

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[[folder: Live Action TV ]]

* On ''Series/BabylonFive'', Vorlon ships had several booms on the front of the ship that each emitted a lightning bolt - like beam. They met in the middle to create a WaveMotionTuningFork effect.
** The Interstellar Alliance's Victory-class destroyers (which were based in part on stolen Vorlon technology) used beams sent from the three wingtips to the front to convert the entire ship into a massive WaveMotionGun.
* In ''Series/StarTrekTheNextGeneration'', the Federation developed a 'collimator beam' made of dozens of small phaser banks spread along the rim of a ship, the energy can be seen flowing along the surface of the Enterprise until it meets at one point, and then fires off from the point on the phaser bank row closest to the target.
** On ''Series/StarTrekVoyager'', Species 8472 has a [[http://memory-alpha.org/en/wiki/Species_8472_planet_killer weapon consisting of several ships that acted like the Death Star when firing simultaneously]].
* The basic enemy fighter ship in ''Kara no Messeji: Ginga Taisen'' did this.
* Several ''PowerRangers'' weapons work by this, the first being the original Rangers' Power Cannon from season two (one barrel fires five energy balls... that turn into one much more Badass one.)
* The weapon Torchwood use against the fleeing Sycorax ship in the ''Series/DoctorWho'' episode "The Christmas Invasion".
** In "The Poison Sky", a similar weapon is used by the AirborneAircraftCarrier the ''Valiant'' to fight off the Sontarans.
* The Eye of Ra (the WaveMotionGun Anubis uses against Abydos) in ''Series/StargateSG1'' is one of these. This makes sense, since ''the entire episode'' ("Full Circle") is a huge ShoutOut to[=/=]AffectionateParody of ''StarWars'' (particularly ''ANewHope''), with LampshadeHanging aplenty.

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[[folder: Video Games ]]

* Multiple Beam Cannon units from ''CommandAndConquer 3'' will sometimes do this.
** The [[KillSat Ion Cannon]] also works in this manner. Unfortunately, this telegraphs the actual attack, enabling your enemy to sell all buildings in the target zone before the main blast occurs.
** In ''Red Alert 3'', the Athena bombardment vehicle features converging beams on its gun. Unusually, they emerge from the same point on the Athena and "sweep" towards to the target from the left, right, and top. Also, they're the ''targeting'' lasers - once they converge, the [[KillSat real weapon]] shoots down from orbit.
* ''VideoGame/{{Xenosaga}} Episode I'' had the Rhine Maiden, a converging wave-motion gun comprising the Dammerung and four smaller vessels in formation.
* ''VideoGame/StarCraftII'''s Void Ray is a new Protoss ship built by the Dark Templar which serves this purpose. The number of beams that converge actually increases over time, letting it be a much better weapon against targets that take a while to kill (though it's still damn good against infantry). It should be noted that the Void ray uses a focusing crystal to do this.
** In the original game, the warm-up graphic for the Battlecruiser's Yamato Cannon was this, several orange globs of energy converging into a single blob. The Yamato is supposed to be the result of causing a nuclear explosion inside a magnetic containment field, then giving a single way out.
* ''VideoGame/WingCommander Prophecy'' was supposed to have the Tiamat dreadnought equipped with a version of the "fleet killer" plasma gun mounted in the Kraken, with the green glowing tips of the Tiamat's arms forming the beam, but technical difficulties prevented it from being implemented.
* ''Bang: Gunship Elite'' has many weapons, one of which fires rapidfire bolts from the meeting point of three continuous beams that emanate from three prongs in front of the ship.
* This looks to have been averted in FreeSpace 2 with the Sathanas dreadnought, which has four massive frontal arms, each with its own beam cannon. Until the end, when they're brought together to form a sort of wibbly wobbly SwirlyEnergyThingy between the arms.
** ''Vassago's Dirge'', a game mod, shows the titular Ravana destroyer doing this however.
* Many of the Polaris vessels in ''VideoGame/EscapeVelocity Nova'' (most notably the Arachnid and Raven) do this with their pink CPL (Capacitor Pulse Laser).
* ''VideoGame/StarTrekArmada 2'' has the Species 8472 weapon mentioned above. It's severely AwesomeButImpractical, given that it needs one specialized ship and eight others, plus the necessary research, but it can depopulate a planet or destroy most any ship if you can land a hit.
* In the ''VideoGame/MagicalGirlLyricalNanohaAsPortable'' games, Hayate's [[FinishingMove Ragnarok]] is portrayed like this. The three beams that fire from the points of the [[InstantRunes Belkan Traingle]] spiral towards one another and converge into one larger beam that strike the target, then Hayate triggers the last part of the spell to make the resulting beam even bigger.
* If the {{Halo}} anime ''[[HaloLegends Legends]]'' is taken into account, Forerunner weapons often utilize this. A small fleet of ships in formation form a web of energy lines, which the central ship fires at a fleet of Flood ships. Forerunner infantry are also seen with LaserBlade /RayGun weapons which, when fired simultaneously, form combining highly-destructive [[SwordBeam Sword Beams]].

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[[folder: Western Animation ]]

* Though a case of AllYourPowersCombined, not this, CaptainPlanet's summoning looks a lot like doing this with ThePowerOfFriendship.
* ''WesternAnimation/MyLittlePonyFriendshipIsMagic'':
** Princess Celestia using the elements of Harmony on her own to banish Nightmare Moon in "Princess Twilight Sparkle" is presented this way, with the other five Elements channeling their power into the Element of Magic for a massive beam.
** In ''[[Recap/MyLittlePonyFriendshipIsMagicS4E26TwilightsKingdomPart2 Twilight's Kingdom Part 2]]'', the Mane Six's new friendship powered WaveMotionGun manifests this way, blasting Tirek with six individual beams of light before they combine into one powerful blow that defeats him, takes back the stolen magic, locks him back in Tartarus, and releases Celestia, Luna, and Cadance from Tartarus when their own magic is restored.

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[[folder: Real Life ]]

* Lasers sometimes have multiple sources, then focus them all together into one coherent beam on exit (particularly ones that are supposed to be stupidly powerful, but where mobility is not a concern, like in laboratories).
** This is also the logic behind a phased array, we just can't do it with lasers... yet.
** And a phased array laser could be called... You guessed it, a [[{{Portmanteau}} phaser]]! (Though [[NonIndicativeName that's not what Star Trek's phasers canonically are]].)
* An '[[http://en.wikipedia.org/wiki/Nuclear_weapon_design implosion bomb]]' uses multiple smaller explosions to set off the main charge.
* Some radiotherapy devices used for treatment of highly localized brain tumors operate on this principle. The method is called "gamma knife radiotherapy". Basically, they send several hundred (usually over 200) narrow gamma ray beams into your head. Each beam is fairly weak and doesn't do much damage, but they all intersect where the tumor is located. * Sizzle!*
* Though not a weapon, this is how inertial confinement fusion reactors are supposed to work - with hundreds of laser beams converging on a tiny spherical pellet of fuel, causing it to implode and ignite a fusion reaction.

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