The EverBright

The EverBright is /was a Noldor King's sword in the time before history, during The war of the Elves. It is said to have been forged in Celestial Fire and can cut anything.

The sword is lost and no rumor claims any clue on how it may be found, but some say if the Dark Elves were to return, a new Noldor King would arise to claim the EverBright.