Energy sword (fiction)

"A noble and ancient weapon, wielded by the strongest of Sangheili, requires great skill and bravery to use, and inspires fear in those who face its elegant plasma blade."

- Supreme Commander Thel 'Vadamee

Energy swords, sometimes known as plasma swords, are a class of single-handed, double-bladed energy weapons developed by the Sangheili. To their users, they are formally designated as fireblades, and nicknamed plasma blades. The Office of Naval Intelligence has typically type-classified encountered energy sword variants under the designation of the Type-1 Energy Weapon/Sword (T-1 EW/S). Nicknames for the energy sword includes Katana and Kill Beam.

Design details
An energy sword's twin blades are superheated plasma contained in a tightly configured magnetic field generated from its grooved hilt. Within the hilt, there is an energy storage device that doubles as a field generator, which, when activated, projects the blade, with the stabilized superheated plasma being enclosed in magnetic lines extending from the hilt.

The weapon is powered by a small battery that supplies power to both the plasma generator and the magnetic field generator. The battery's energy is reduced for each successful strike. Once the battery power is fully depleted, the sword will deactivate unless recharged. The horizontal hilt forces the wielder to use a punching motion to stab rather than the thrusting motion of most knives and swords.

Some variants, notably the, contain a fail-safe mechanism that can permanently disable the weapon if the Sangheili wielder drops it. When dropped, the failsafe engages by deactivating the magnetic field before dispersing the plasma. The plasma then consumes the handle and thus destroys the weapon. The fail-safe is included to prevent enemy from acquiring the weapon and using it.

Mass-produced models generally feature a simple hilt design, but more individualized models can be quite ornate. Different patterns are typically expressed through the shape of the blade; different contours can have either smooth curves or elegant angles. Furthermore, the color of the superheated plasma can vary with no functional difference as well, though most energy swords glow with a blue tint. Sangheili blademasters are often commissioned to create ornamented and hand-customized for elite individuals. As such, drastic variations have been observed. For example, Arbiter Ripa 'Moramee's matching pair of custom-designed swords had basket-style hilt guards and radiated a high degree of ionized plasma, whereas most energy swords contain the blades' plasma with greater efficiency. Arbiter Thel 'Vadam's personal sword, the Prophets' Bane, was pale salmon-colored and had a wider blade compared to mass-produced swords. Ancient energy swords are marked by their creator and first owner, but often their legacy is forgotten.

History
The energy sword's design is seen as the logical evolution of an ancient lineage of traditional Sangheili weapons, most notably the twin-scythe and the curveblade; superficially, the ancient melee weapons' influence on the energy sword's design is unmistakable. The sword was originally crafted from hardened resin found in trees which lined the coastal territories of Sanghelios, but as they began carefully exploring Forerunner technology, the weapon was refined over time using Covenant technology, eventually taking its current state. Technologically, the energy sword succeeded an older type of Sangheili sword known as the burnblade, which was created by the arm masters of Qikost—one of Sanghelios' moons—in the early period of Sangheili interstellar expansion, and was used in the early years of the Covenant. Modern energy swords are manufactured by the Merchants of Qikost, a prominent group of arms makers on Qikost. Prior to the fall of High Charity, they were also manufactured in the city's Assembly Forges. Following the Great Schism and the dissolution of the Covenant, the designs templates and existing models of energy swords from the Covenant were inherited by its splinter factions.

Closely aligned with the Sangheili's rigid sense of honor, the energy sword is the signature weapon of the Sangheili, and its usage has historically been regarded as both an expression of a Sangheili warrior's clerical honor and his personal combat skills. The Sangheili pride themselves on their skills with the weapon, which they regard as holy, and believe that it is better for a Sangheili to fall on his sword to redeem his honor than to die dishonorably. Pzish'zawk is the martial art form which consists of the use of dual wielded energy swords. Mastery of the practice earns one a high level of renown in Sangheili society, and is a skillset sometimes associated with those assigned the title of blademaster.

Operation
Since the weapon utilizes shaped plasma rather than traditional solid matter, the energy sword lacks any solid material in which to hold or impale anything; the sword does not cut or carve in the traditional sense, but rather boils anything it comes into contact with. The blade's edge is therefore extremely volatile, being able to slice through even the toughest metals like a hot knife through butter, including ODST armor and the Titanium-A class plating of UNSC destroyers. Injuries caused by the weapon are often gruesome. Stab wounds by the energy sword are, in most cases, fatal, as the blade passes through the body, leaving the organs and tissues cauterized by the extreme temperatures produced by the blades; wounds inflicted by the energy sword are sealed by the immense heat. Body fluids in the area of the stab wound are flash-vaporized upon contact; organs within the area of the stab wounds can suffer life-threatening damage dependent upon which organs are struck. The effects of fluids trapped in organs or arteries and the expansion of heat could lead to ruptures or small explosions, causing additional damage to the victim.

Survival is minimal at best and in the case of non-lethal strikes being administered, proper medical treatment must be applied as soon as possible to ensure permanent survival. Because of the weapon's sheer destructive damage, common forms of fatality to victims include total impalement, loss of limbs, bodies being bisected, and even decapitation.

The weapon's most glaring downside is that it is purely a close-quarters weapon; any combat engagement outside of the effective range puts the wielder at risk. It is for this reason that the Sangheili approach sword combat on the battlefield in two different ways, by funneling the enemy into close-quarters to allow them to strike, and/ or to apply a form of stealth using both technology and technique. Without these, the user is vulnerable to attack by all forms of ranged attack, especially from sniper-based counterattacks. Furthermore, the energy sword can sometimes expose the position of a Sangheili warrior employing active camouflage due to the weapon's energy output.

Usage
The Sangheili are very strict on who can be trained in the art of swordsmanship; in civilian life, only aristocrats are permitted to wield energy swords. Sword wielders are not eligible for marriage, though they may breed with any female they choose, married or otherwise, to ensure that the genetic material which result in sword-wielding traits are properly transmitted to each subsequent generation.

Within the Covenant military, use of the energy sword is not restricted to aristocrats. Sangheili Minors are generally not permitted to wield the sword because of the high regard in which it is held, though exceptions have been witnessed. Storm troops, Ultras, Zealots, Generals, special operation officers, stealth troops, and honor guardsmen commonly use energy swords. Some Sangheili special forces units, notably the Silent Shadow, employed bloodblades, blood red-colored energy swords which burn hotter than more common models.

Within the Banished, there is no enforced uniformity for the energy sword, allowing each warrior to customize their weapons to their own needs. That being said, the most common variants appear to be the Domotos-pattern and the Meluth'qelos-pattern.

Variants

 * Patterns
 *  - A variant with angular contours and a rectangular hole along the inner edge of either blades, with widespread use in the Banished, Jul 'Mdama's Covenant, and the Swords of Sanghelios in the post-war period.
 * Ravening Sliver - Lightweight relic blades with a green hilt and deep blue tint plasma. Each model was marked by its creator and first owner.
 * Vorpal Talon - A lightweight variant with a maroon hilt and plasma that produces an orange-to-cyan gradient.
 *  - A variant with angular contours that saw use among the Banished during the Battle for Zeta Halo.
 * Duelist energy sword - A cobalt colored Meluth'qelos-pattern energy sword with a white hilt. It was used by Okro 'Vagaduun during the Battle for Zeta Halo.
 *  - A variant with circular contours on the blade around the hilt.
 *  - A variant with asymmetrical blade design.
 * Unidentified energy sword pattern - A variant with a widened gap between the two blades above its hilt.
 * Fleet of Retribution variant - A variant used by Sangheili from the Fleet of Retribution in 2552.
 * Mdama keep variant - A variant manufactured by 'Mdama keep in 2558. The plasma burned less intensely, thus making it harder to cut armor, but causing more grievous injuries and not cauterizing wounds. These swords took advantage of the Sangheili code of honor to make every wound a death blow, as Sangheili who wanted to retain their honor would often commit suicide.

Silver Timeline
are used by Covenant Sangheili against humanity.

Fractures: Entrenched
The Covenant employed arcanoblades, based on arcanotechnology.

Gameplay
The energy sword was first introduced in Halo: Combat Evolved, albeit unusable by players. It was then made available to players in Halo 2 and has become a mainstay weapon in series ever since. The energy sword is a powerful melee weapon in close-quarters combat, capable of killing most foes with a single strike. It is a power weapon that appears on some multiplayer maps.

There are two ways to attack with the energy sword. The first is a simple melee, this performs a quick horizontal or overhanded swipe. The second attack is to lunge with the energy sword, allowing players lunges forward at the enemies. However, this require the player to initiate an attack when the aiming reticule turns red, indicating that the opposing player is within range. A depleted energy sword hilt can still be used offensively. While the damage varies, it has a higher melee rate than any weapon, allowing the player to barrage an enemy with many hits. Once the hilt is swapped for another weapon, however, it cannot be picked up again and often vanishes entirely. <!--

Changes from Halo: Combat Evolved to Halo 2
In Halo: Combat Evolved, the energy sword has a cyan glow, a far less defined edge and makes a dull clunk when striking an object. It is only used by Stealth Sangheili and Zealots. The player cannot wield the energy sword, due to a fail-safe mechanism that vaporizes the weapon when it is not released properly (e.g. being dropped upon death) by the sword-wielder.

In Halo 2, the energy sword is blue with purple undertones, with electrical energy crackling on it when the blade is activated. The white glow seen in Halo: Combat Evolved is also replaced with a more glass-like transparency. In the campaign, it is only used by higher-ranking Sangheili, such as special operations units, Ultras and Zealots, though players can now wield the sword. The sword in campaign has a battery and can only be used effectively against a limited number of enemy forces before the battery runs out. The sword is usable in multiplayer with an infinite battery power. The energy sword has two modes of attacking; a lunge attack and a swing attack.

Changes from Halo 2 to Halo 3
In Halo 3, the sword has more of a light cyan tinge, similar to its appearance in Halo: Combat Evolved, but still has a tint of purple near the handle. It also has an angle near the handle, whereas in the two previous games it was curved. Players are now able to parry with the Sword. The power exerted by the swords hitting each other will drain both players' shields, but will not kill them unless one makes the fatal blow. The sword's lunge attack has been reduced for balancing purposes. Aside from these changes in design and functionality, the power of the sword remains unchanged. In multiplayer, the sword now has a limited battery supply.

Changes from Halo 3 to Halo: Reach
In Halo: Reach, the sword is now darker in color. When activated, it is capable of lighting up the surrounding area. When unused, the sword rests differently on the SPARTAN and Sangheili character models. The energy sword appears to have been balanced out compared with its earlier incarnations, having a slightly faster swing than its Halo 3 incarnation, its lunge attack now does the same damage as a normal swing, the range has been reduced, and can now be blocked by a well-timed normal melee. Players can no longer lunge immediately after a normal swing. The energy sword also has its own assassination animations when used against Elites or Spartans, replacing the Spartan combat knife and the Sangheili energy dagger; these assassinations do not deplete the sword's charge, nor do they count toward the weapon spree medals Sword Spree, Slice 'N Dice, or Cutting Crew. Elites also hold the sword back more than a Spartan when used as an active weapon. When a player is playing as an Elite and uses the energy sword as a primary weapon, the camera will lower a bit; this is due to the Elite hunching down. Finally, parrying does slight damage and can kill a player.

Changes from Halo: Reach to Halo 4
Contrary to Halo: Reach, Halo 4 does not feature the possibility to block a sword lunge with a simple melee. Killing an opponent with an energy sword no longer rewards the player with a Pummel medal, it is instead replaced by the Sword Kill medal. The battery is also drained with every hit, including against walls and floors, so it's far less viable against Hunters and other powerful enemies.

Changes from Halo 4 to Halo 2: Anniversary
Like the original Halo 2, players cannot parry with the sword. An alternate version of the sword with a red-colored blade, called the Infected energy sword, can be used.
 * Players can melee with the sword as soon as they swap to it.
 * Melee range is drastically increased.
 * Unlike its Halo 2 counterpart, its battery can be depleted.

Changes from Halo 2: Anniversary to Halo 5: Guardians
The Halo 5: Guardians sword retains the ability to parry from Halo 4. Unlike in past titles, players can aim with the sword to increase its effective range, and the weapon provides a noticeable speed boost which is enough to make the player visible on the motion sensor while crouching. Three unique versions of the energy sword are available for use: Ravening Sliver, Vorpal Talon, and the mythic Prophets' Bane.

If the energy sword's battery is depleted, the player cannot lunge with the sword.

Changes from Halo 5: Guardians to Halo Infinite

 * The energy sword no longer has the ability to Smart Scope
 * Lunges from the energy sword depletes ~15% of its battery as opposed to 10% in past games.
 * Power ammunition crates and energy swords in the battlefield refill its battery without the need to pick up a fresh one.
 * The sword is curved again, similar to the Halo 2 and Halo 2: Anniversary incarnations. The blade is also now a much deeper blue, similar to Halo: Reach’s.

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Trivia

 * The shape of the energy sword is very similar to the real-life combat weapon, the katar. It was a South Asian weapon and status symbol, similar to the energy sword's symbolization of status among the Sangheili.
 * In the Halo 3 ViDoc Et Tu, Brute? there is an unfinished animation depicting a Jiralhanae Chieftain wielding an energy sword. The energy sword, however, was never seen in the hands of Jiralhanae in the final game.
 * As a part of Dares of Eternity in Destiny 2's Bungie 30th Anniversary Pack, two swords resembling the energy sword, the arc sword Half-Truths and the void sword The Other Half, were released.
 * In Konami's Super Bomberman R, the Halo 3 energy sword is the weapon used by the Arbiter Bomber.

Concept art and artwork
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List of appearances

 * Halo: Combat Evolved
 * Halo: The Flood
 * Halo: First Strike
 * i love bees
 * Halo 2
 * Halo Graphic Novel
 * The Last Voyage of the Infinite Succor
 * Halo: Ghosts of Onyx
 * Halo 3
 * Halo: The Cole Protocol
 * Halo Wars: Genesis
 * Halo Wars
 * Halo: Helljumper
 * Halo 3: ODST
 * Halo Legends
 * The Package
 * The Duel
 * Origins
 * Halo: Evolutions - Essential Tales of the Halo Universe
 * Headhunters
 * The Return
 * Halo: Blood Line
 * Remember Reach
 * Deliver Hope
 * Halo: Reach
 * Halo: Fall of Reach
 * Invasion
 * Halo: Combat Evolved Anniversary
 * Terminals
 * Halo 4: Forward Unto Dawn
 * Halo 4
 * Spartan Ops
 * Halo: Spartan Assault
 * Halo: Escalation
 * Halo: Broken Circle
 * Halo: Nightfall
 * Halo 2: Anniversary
 * Terminals


 * Halo: Spartan Strike
 * Halo: Hunters in the Dark
 * Halo: The Fall of Reach - The Animated Series
 * Halo 5: Guardians
 * Halo: Shadow of Intent
 * Know Your Enemy
 * Halo: Ground Command
 * Halo Mythos
 * Halo: Fractures
 * Breaking Strain
 * Oasis
 * Halo: Tales from Slipspace
 * Fireteam Majestic Poker Night
 * Hunting Party
 * Knight Takes Bishop
 * Halo: Smoke and Shadow
 * Halo Wars 2
 * Halo: Envoy
 * Halo: Recruit
 * Halo: Rise of Atriox
 * Halo: Legacy of Onyx
 * Halo: Bad Blood
 * Halo: Fireteam Raven
 * Halo: Silent Storm
 * Halo: Lone Wolf
 * Halo: Outpost Discovery
 * Halo: Oblivion
 * Halo: Meridian Divide
 * Halo: Shadows of Reach
 * Sacrifice
 * Halo: Divine Wind
 * Halo Infinite
 * Halo: The Television Series
 * Contact
 * Homecoming
 * Transcendence
 * Halo: The Rubicon Protocol
 * Halo: Outcasts