
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 twin-scythe's influence on the energy sword's design is unmistakable. Storm troops, Ultras, Zealots, Generals, special operations, stealth troops, and honor guardsmen commonly use energy swords. It is unknown whether this extends to Majors, as at least one has been witnessed using an energy sword. 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. Within the Covenant military, use of the energy sword is not restricted to aristocrats. Sword wielders are not eligible for marriage, though they may breed with any female they choose, married or otherwise, to ensure successful transmission of "swordsman" genes. 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. 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. The energy sword is the signature weapon of the Sangheili and has been their chief weapon of nobility since its creation during one of the Ages of Discovery.



The Type-1 Energy Weapon/Sword ( T-1 EW/S), commonly known as the energy sword or the plasma sword, is a traditional Sangheili close-quarters weapon. " 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
