Before Gekkoukan High School was founded, the building was built by Kirijo Group, intended as a laboratory to instigate and experiment on Shadows. The scientists would gather the shadows and harvest them, amplifying their capabilities and their potential. It is later shown that during the experiment, the arcana that was never meant to be, Death, was created. It is also revealed that via the experiments, the leading group of the scientists came to know about The Fall. The majority of the scientists embraced the prophecy, with the exception of Yukari's father. Declining Death, Yukari's father intercepted the experiments and destroyed many of the facilities along the way. It is also where the Shadows who began to merge with one another, intending to reform into Death, who was forcefully torn