Type 1 Energy Weapon/Sword

The Type-1 Energy Weapon/Sword consists of a curved hilt, housing an energy storage module and a  The Type-1 Energy Weapon contains a failsafe mechanism witnessed during the Battle of Installation 04 that can permanently disable the weapon if the Sangheili wielding it drops it. When dropped, the failsafe engages by deactivating the magnetic field before dispersing the energy. The energy then consumes the handle and thus destroys the weapon. The failsafe is included to prevent enemy infantry from acquiring the weapon and using it, and is yet another insight to Sangheili tactics. The failsafe seems to be rarely used, or was only included in a variant of Energy Sword issued to the Covenant ground forces deployed to Installation 04 by the Fleet of Particular Justice.device for projecting the plasma which forms the blade. The actual blade is composed of two partially ionized 'blades' of free moving electron based gas held in a blade-like form by two small magnetic-field generators built into the handle of the weapon. This forms and contains the oval shaped, ionized blades for which the weapon is recognized. The battery's energy is reduced for each successful strike. Each killing strike from the sword will drain the battery by 10% of its energy. Once the battery power is fully depleted, the sword will deactivate unless recharged.

The Energy Sword is the signature weapon of the Sangheili, and has been their weapon of nobility since its creation during one of their Ages of Discovery. Viewed as a holy weapon the Sangheili pride themselves on their skills with this weapon and believe that it is better for a Sangheili to fall on his sword as an act to redeem his honor. The Sangheili are also very strict on who can be trained in the art of swordsmanship - only aristocrats are permitted to wield Energy Swords and sword wielders are no longer eligible for marriage. Although Fal 'Chavamee was a skilled swordsman and instructor, despite being married it is unknown how his aristocrat status was enforced or if this was changed as a result of his actions. Breeding with any female they choose is permitted, married or otherwise, to ensure successful transmission of "swordsman" genes. In service to the Covenant, Sangheili of a high or important rank are permitted to wield this weapon - lower ranks are not permitted to wield the sword because of its high status. In the Covenant, Zealots, Special Operations, Stealth units and Honor Guardsman, are permitted to use Energy Swords. Though other ranks may be given swords based on the situation.

The members of the Spec Ops unit, Tacit Ronin each have their own Energy Sword which they have personally decorated and named. Known Energy Swords are Lucy (The Field Marshall), Kacy (TWIO), and Angela ('Demunthee).