The Oz Series (Oz), an abbreviation for Originator Zero (根源たる虚無), is series of homunculi created by the Gnomes of the Black Workshop.


The Oz Series are beings with a complete link to a combat shell. They are both human and weapons at the same time. Alberich refers to them as the raw material from which a blade capable of slaying a Holy Beast, to be wielded by a Divine Knight, can be forged.[1] By sacrificing their life, the Oz series sublimates into a weapon that is referred as the Sword of the End (終末の剣). It is the only blade that is capable of damaging the Holy Beasts of Aidios. Alberich requires this blade to unleash the curse contained within the corrupted Holy Beast sealed in the Gral of Erebos.

The project, supervised by Black Alberich, has been in works for many years. When he is confronted by Rean Schwarzer and New Class VII, Alberich explains the many steps he has gone through. He:[1]

List of Units



  1. 1.0 1.1 Trails of Cold Steel III, Finale: "For Whom the Bell Tolls", 07/18, Gral of Erebos.
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