The Da'at Yichud is an ancient secret society that has designs and inventions centuries ahead of contemporary times. Their practices are based on pure reason and are described as a way of understanding God through knowledge rather than "supernatural bupkis". Their creations never had a purpose beyond the act of creation and were nothing more than a method of communing with God. As such, they were never intended to be used. Set Roth is one of the known members of Da'at Yichud who helped the Nazis to become a advanced army, and finding one of the safe-keeps in the Atlantic Ocean.