Quote:

"The sword is not of this earth. It binds men to it who might otherwise be disloyal."
―Chaya Shirōjirō Kiyonobu about Oda Nobunaga's Sword of Eden in AC Unity.

The Swords of Eden are Pieces of Eden created by the Isu in the manner of swords. Invented by Hephaestus and Consus for the War of Unification, since the fall of the Isu, the Swords have been most commonly used by influential humans in war and conquest.

The Swords of Eden are some of the most powerful pieces of technology created by the Isu and possess a myriad of advanced abilities. The Swords empower their wielders with incredible charisma, making all those around them extremely loyal and obedient. They also render their wielders immune to the illusion casting effects of the Staves and the Apples of Eden.

One Sword in particular could cast a sonar-like echolocation, akin to Eagle Vision, which can detect the presence of enemies within the wielder's vicinity. It could additonally project energy blasts that knocked out even the strongest of foes, as seen when a French Templar used the artifact against the Assassin Thomas de Carneillon.

Created by the Isu scientist Hephaestus for use in the War of Unification, this Sword consisted of two components: the blade itself and the Heart, which unlocked the Sword's full abilities. By the early 14th century, the Sword was in possession of the Knights Templar. After the Templars were branded as heretics in 1307 by Pope Clement V, and the Parisian Temple was attacked by King Philip the Fair's forces, Grand Master Jacques de Molay entrusted his advisor with hiding the Sword and the Codex Pater Intellectus, a book written by de Molay.

The advisor succeeded in his task before being slain by the Master Assassin Thomas de Carneillon, who then attempted to retrieve the Sword but failed. Meanwhile, de Molay, who had secretly removed the Heart from the blade, was captured by King Philip's forces and imprisoned in the Château de Chinon. While awaiting execution, the Grand Master buried the Heart within some graffiti on the wall of his cell.

In 1429, during the Hundred Years' War, Jeanne d'Arc, guided by her 'voices', obtained the Heart during her stay at the Château de Chinon's Coudray Tower while awaiting an audience with the then uncrowned Charles VII. She later obtained the Sword itself, which at some point had been recovered and buried underneath Church of Saint-Catherine at Sainte-Catherine-de-Fierbois.

Jeanne went on to use the Sword to secure many victories for France during the war, inspiring her comrades and cowing their enemies. However, she eventually lost the weapon during the Siege of Paris, where it was recovered by Templar agents and placed back in its secret chamber. The Heart, meanwhile, was thrown into the Seine by Geoffroy Thérage following Jeanne's alleged execution.

"With you? The Sword of Eden, for some... the most useless sword of all, for others? The most powerful sword that could have been created since it has devastating effects on its enemies. (Some call it the sword of God, since it is made with the pieces of the Eden artifact. Yes, that apple or whatever... that Altair had in his hand, and that he took from Al-Mualim) for others??? The most overrated of the entire AC franchise. For me? A beauty and unique work of art, which cost me to get in the game. There are many more swords, which contain "the piece of Eden" like the excalibur, among others. There is even a katana. But tell me, which is your favorite sword of Eden? Mine is this one. Now yes! Travel throughout the world of San Andreas and subdue your enemies with this powerful masterpiece. Promoting control in everyone... and in everything... Enjoy! Your friend says goodbye!"