Figured I'd just pull together all we know about the relic and Zodiac Braves weapons. Add to it please; I know there are tons of gaps in my lore knowledge!
Curtana + Holy Shield & Excalibur + Aegis Shield
Originally Posted by Lodestone 1.0
Originally Posted by Gerolt
Originally Posted by Well-schooled Steward (Little Ladies' Day 2015)
The player's Curtana appears to be the genuine article, recovered from the Amalj'aa tribe who sacked Jhal Tristram's tomb. The spirit of the original blade was imbued into the replacement weapon the player provided to effectively become the real weapon. It is unknown if the weapon wielded by Solkzagyl in the Paladin quests is one of the three sister blades of Oathkeeper with the same appearance as Curtana.Originally Posted by Jalzahn
Sphairai & Kaiser Knuckles
Originally Posted by Lodestone 1.0
Originally Posted by Gerolt
Sphairai is a style of weapon popularized by Ivon Coeurlfist, though the techniques to make it have been lost with the fall of Ala Mhigo. The player's Sphairai is a copy based on a decrepit pair found in Amalj'aa territory. Widargelt also wields a pair of Sphairai, probably genuine.Originally Posted by Jalzahn
Bravura & Ragnarok
Originally Posted by Lodestone 1.0
Originally Posted by Gerolt
Like the Sphairai, Bravura appears to be a style of weapon wielded by "warriors of old" and forged by a presumably Hellsguard blacksmith clan. The version in particular forged by Gerolt is based on Iron Eater's hefty axe with a double weight head. Curious Gorge and his brother Broken Mountain both appear to wield Bravuras.Originally Posted by Jalzahn
Gae Bolg & Longinus
Originally Posted by Lodestone 1.0
Originally Posted by Gerolt
Gerolt appears to reverse engineer the smithing process for Gae Bolg from the original item belonging to Saint Reinette, even though Ishgardian blacksmiths have canonized the exact procedure. Thus, the player's Gae Bolg is the inheritor of the original, even though other characters like Estinien wield copies based on the same forging techniques. Also, it's important to note that Haldrath, the first Azure Dragoon, most likely did NOT wield a Gae Bolg since the story of Saint Reinette post-dates his time.Originally Posted by Jalzahn
Artemis Bow & Yoichi Bow
Originally Posted by Lodestone 1.0
Originally Posted by Gerolt
The player's Artemis Bow seems to be derived from the timeworn original artifact stolen from Gods' Quiver storehouses by the Ixal. It's not clear what the origins of the similar looking weapon wielded by Jehantel are. Though he carries the title "Godsbow", there's no evidence that all such people with the title are given a copy of the Gilbert's weapon.Originally Posted by Jalzahn
Yoshimitsu & Sasuke's Blades
Originally Posted by Gerolt
This seems to be the only relic and Zodiac weapon with a continuity of lore between the two stages, while also revealing some interesting things about Doma and the ninja. Doma is not the origin of ninjutsu; it came from an island even further east. Paradoxically, Sasuke's Blades appear to be the weapons Sasuke used during the Doma rebellion while Yoshimitsu (also the name of the smith who forged them) were found in the vault of Doma's tyrant king after the rebellion was over. Oboro also wields a pair of Yoshimitsu, implying that the smith forged multiple pairs over the course of his lifetime. Thus, Sasuke's Blades are a unique one-of-a-kind weapon while there are multiple pairs of Yoshimitsu in the world.Originally Posted by Jalzahn
Thyrus & Nirvana
Originally Posted by Lodestone 1.0
Originally Posted by Gerolt
Thyrus is the personal weapon of A-Towa-Cant, who naturally wields it in his appearance in the White Mage quests. The player's Thyrus inherits the spirit of the original when the player finds it in the final resting place of A-Towa-Cant, the U'Ghamaro Mines.Originally Posted by Jalzahn
Stardust Rod & Lilith Rod
Originally Posted by Lodestone 1.0
Originally Posted by Gerolt
Shatotto created many Stardust Rods using fragments of the Meteor she called down for funsies. The weapon wielded by Ququruka as well as the player's Stardust Rod are likely originals made by Shatotto and restored to working condition. This quest also reveals that dark matter is just regular matter infused with Meteor particles.Originally Posted by Jalzahn
The Veil of Wiyu & Apocalypse
Originally Posted by Gerolt
The Veil of Wiyu is the legendary weapon of the ancient Allagan summoner Wiyu, the original of which the player discovers in the Sylphlands. The only other summoner in the game, Tristan, uses a copy of Ifrit's Grimoire.Originally Posted by Jalzahn
Omnilex & Last Resort
Originally Posted by Gerolt
Copies of the Omnilex appear to be standard issue battle codexes for high ranked scholars of Nym. As well-maintained copies of said book are no longer extant, the player restores one retrieved from the former Nymian port in the Sapsa Spawning Grounds, both in text and in form. It's possible and even likely that Golbas Rombas' Last Resort is merely a rebinding of the Omnilex with improved aetheric conductivity designs on the cover, since the standard issue version already contains "all the military tactics ever conceived by man".Originally Posted by Jalzahn
The Zodiac Braves
There are twelve Light-bearing heroes known as the "Zodiac Braves" who arise "when the world lies upon the brink of destruction [...] to banish the Darkness". As there are twelve heroes and ten weapons currently in the game, it stands to reason that at least two of the new jobs introduced in the expansion pack will wield weapons imitating the Zodiac Braves'. I don't want to speculate too much on this so I'll just leave the poem from the Trials of the Braves books and Sphere Scroll:
I will continue to update the OP with new information as it is discovered.