Origin

Origin is a region in Xenoblade Chronicles 3. It resembles a mechanical sphere, and the first Ferronis. It is the final region in the game.

Xenoblade Chronicles 3
It is revealed by Queen Nia that Origin is an ark that houses the consciousness of the worlds of Bionis, and Alrest respectively with the intent to reboot them once both worlds fused back into one. Each half of Origin was constructed on each side of the worlds, with the one on Alrest designed by a certain Nopon engineer. Ultimately, the reboot process failed due to Z and Moebius (who are a manifestation of the stored consciousness' fears) interfering, imprisoning Melia within Origin as a means of taking it over.

Since Origin rests beneath the Great Sea, it is impossible to traverse there by normal means, and thus the party requests Samon to use the Bravery (which can traverse the Great Sea). But the ship is incomplete; the party need six Origin metals to complete it. After the party traverse all over Aionios to retrieve the metals to complete the ship, the party and several Lost Numbers stages an assault on Origin, only for Z to activate it defenses. Origin then begins to fire upon the Lost Numbers, the party, and even Colonies that are still bound to Flame Clocks, much to the party's horror. Eventually the party manages to penetrate Origin's defenses and reach the interior.

As the party explores the inner chambers of Origin they came under attack by constructs that comprise of Moebius. Eventually the party reaches the Eternal Prison (where Melia was held prisoner) in which N ambush the party, but was swiftly defeated, prompting N to reunite with Noah before freeing Melia. As the party explores the depths of Origin, they came under attack by a swarm of Kurria Flak (which are repelled by the arrival of and Ghondor), X, and finally Y before finally arriving at the core of Origin which contains an Amphitheater.

After the party defeats Z's first form, transforming him into Z∞. After transforming he transforms Origin into a more angelic appearance as he uses it to destroy Aionios. After Z∞'s death, Origin reboots, causing Aionios to split back into the worlds of Bionis, and Alrest respectively.

Future Redeemed
At an unknown point, Alpha hijacks control of Origin from Moebius, intending to use it as an Ark to carry the City s to a new world after destroying the humans that are descended from the worlds of Bionis and Alrest. Despite this, Moebius still have access to the Amphitheater within, it is unknown if Alpha is aware of its existence.

Origin is first revealed after an Alpha-possessed Na'el uses 's defense mechanism to reveal it before teleporting there after N defeats Matthew. From this point onwards, Matthew and his comrades' objective is to reach Origin through Prison Island. When the party reaches the  N bars their way with the intent of stopping the party from reaching Alpha first, but fails. After N's defeat, Alpha teleports the party within Origin, showing them an illusion of Klaus's world before his experiment splits it in two. After the illusion ends, the party comes face-to-face with Alpha in which they defeat with the assistance of a recently freed Na'el and surprisingly, N who then transferred a portion of his swords power to his gauntlets, allowing the party to Interlink and deliver the final blow to Alpha. After Alpha's death, Moebius regains control of Origin and plunges it into the depths of the Great Sea.

The ending of Xenoblade Chronicles 3 is expanded upon in the post-credits scene, as it's revealed that while the two worlds were about to separate as planned, they instead fused without any failures or annihilation events.

Lore

 * Origin's architect is based off of Ontos's core.

Areas

 * Origin Interior

Trivia

 * Origin's layout and role is similar to Merkava from Xenogears.
 * Z transforming Origin into an angelic structure mirrors Deus emerging from Merkava to terraform the planet where Xenogears takes place.
 * When Alpha transforms interior of Origin before the final battle, it resembles the battle arena where the final battle against Deus takes place.
 * Origin seems to be impervious to annihilation events as seen in the final battle when Nia uses Agnus Castle's Annihilator to attack Origin in the final battle.