the Researcher of the laboratory realized that Hiroto owned a vast Mana pool that was far greater than that of an ordinary person incredible amounts of Mana even though had no aptitude for any attribute. This was a bizarre contradiction in the eyes of the researchers. And among them, one suddenly came up with an idea.
It’s not that this experimental subject has no affinity for any attribute. Rather, there’s another attribute that we’ve not discovered that this subject has an affinity for. Isn’t that possible?」(Researcher)
After several years of research with Hiroto as a human subject, they discovered the eighth attribute – the attribute of death. The researchers had Hiroto learn the death-attribute magic that they had discovered and reconstructed his entire body, including his brain, to continue their research and experiments.