"Cormanthyr: Empire of Elves".
Long story short, the initiative came from High Mages of Elven Court, and each elven land was to make at least 25 moonblades and give to the clans (both nobles and commoners) who want to claim. The total number was over 300, survivors of the First Claiming ceremony - 180. Also, they are all linked, and when there's only 24 activated moonblades, they would signal it's time for Ascension Ceremony - to decide which is the King's blade and thus which clan won the gauntlet.
By the Year of the Fallen Tower, between 30 to 50 moonblades still touch the Weave. Of them, only two moonblades are found within Cormanthyr#146;s glades. Zaor Moonflower wears and wields one with honor among the Akh#146;Velahrn, and this is the only one known.
E.g. Jassin Aunglor killed Venom (the old green dragon of the Tangled Vale) in -206 DR, but his sword was lost with him, in a cave-in.
For comparison, another group of items of this type - elfblades of Cormanthyr. Coronal Oacenth ordered 3, for the ruler, army commander and archwizard.
All those were enchanted using with High Magic and should count as minor artifacts.