Glaive of the Stalwart Ancients

The Glaive of the Stalwart Ancients is a seemingly paradoxical ancient energy weapon closely resembling design. It has been described in stories that Sangheili and have told, and its disappearance is mythical amongst their culture. It belonged to an unidentified Sangheili hero.
The weapon predates the Covenant era, but there is yet a strange mystery - it appears to have been forged using with a six-foot hilt composed of an unknown alloy and two separate affixed at both ends of the polearm, which turns it into a deadly staff capable of assaulting multiple foes at once in but a single strike, if one were ever to wield it. Most strange because neither designs existed in the pre-Covenant era, which has baffled the many who know of it. There were a few attempts to replicate its design, but said attempts were inferior - structurally weak, and the blades at the end of the replicated weapon has been an issue during battles.
Its current whereabouts are unknown, but Sangheili of recent times - especially those with a mind of searching of ancient artifacts - have expressed interest in uncovering the Glaive. It was lost to the Sangheili not long after its creation, which is deemed nearly impossible as the staff closely resembles modern technology. Some of Sangheilos' greatest minds theorize that the weapon is in fact not ancient at all, and instead was sent back in time through an unknown temporal anomaly, which may in some fashion have a link to the and its time-bending properties.