This is KOS-MOS version 1:
KOSMOS vs Gnosisround 1YouTube videoround 2YouTube video Absorbs a vast number of G-nosis with the X-buster
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KOS-MOS fights OmegaYouTube video[center]Vast Super Human strength, speed, agility and durability are the highlights of this fight.
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Tertiary Weapon System
YouTube video
KOS-MOS uses the Tertiary Weapon System to penetrate the barrier that surrounded Rennes-Les-Chateua
KOS-MOS uses the Tertiary Weapon System to match U-do's energiesYouTube videoU-do is the Xenosaga God[/center]
The Tertiary Weapon System is only compatible with versions 2, 3 & 4.
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KOS-MOS version 4 takes on VoyagerKOSMOS reawakens to save Shion's ass yet again. She sports a new look and a noticible upgrade as she takes on VoyagerYouTube videonote how the party comments on KOSMOS upgrade
The Testaments are incredibly powerful and may easily rank among the most powerful entities in the series. Testaments are not corporeal in nature, in fact they are more like Gnosis (which they can also transform into) than they are human. In fact they do not even exist on the same plane as physical human beings. It is explained in the Episode III database that they only appear human because they affect people's perceptions, so much so that the people they confront actually believe they are seeing them as they are. An example is given that if a picture/video were taken of a Testament, they would not appear in it because they do not physically exist. However, if they wished it, they could cause themselves to appear in the photo/video because they are capable of manipulating the Real Numbers Domain from the Imaginary side.
They exist in only one of the two planes of existence the Xenosaga universe is composed of. A plane by the name "Imaginary Number Domain" (The part of the universe consisting of consciousness), exists parallel and yet in the same space as the plane known as "Real Number Domain" (The physical, material realm). Testaments exist within Imaginary Space. They are capable of continuing to exist as themselves beyond death, due to Wilhelm's God-like power. To be a candidate for Testament-hood, one must possess what Wilhelm calls the "Shining Will." It is revealed in the Episode III database that those who can become Testament are those whose wills resonate purely with Anima. Those who resonate purely with Anima do not transform into Gnosis, and are capable of awakening the Anima Vessels. The Black Testament's speech confirms that the main heroes were in fact all capable of becoming Testaments. Assisting in the awakening of the Anima Vessels for the sake of Zarathustra, is the main task of the Testaments.
Because they do not exist on our physical plane they can subvert the laws of physics to perform phenomenal feats. Virgil aptly explains; "The laws which govern us are just too different," after he easily brushes aside the party.