An Archaism (人形兵器(オーバーマペット)) is an autonomous orbal machine created by the pre-Collapse societies of ancient Zemuria using technology lost to the present era. Archaisms come in all shapes and sizes and have been used for everything from scouting to repair to the defense of vital areas. Ouroboros is capable of copying existing Archaisms and creating new ones in the Thirteen Factories.