Mass-produced version of the "Eight Souls of the Black Sword", life shearers created by Hydra Foundation. Likewise, they are "soul" of Nosferatu—beings that unable to sever their attachments to life—that dwells inside Tortures "container".
They harvest lives while scattering miasma, and continue to devote themselves to the superior existence covered in resentful souls that was born at the end of negative chain. Until the day that a perfect "deadliest Nosferatu in history" was born—
It is a reckless action by the Seven Deadly Sins of Sloth, who has lost his temper in the scandal of being overtaken by two Z/X that possessed the "Most Evil" title in the Red World.
"21 January 2021" addition
At the other day, a "female-type red unique specimen" not under the control of Dagon Cartel, who is being responsible for their operation, was sighted.
The mass-produced Black Swords was tested at the Tombcastle and Exorcision War under the directions of the Seven Deadly Sins of Sloth. However, they were simultaneously withdrawn at the same time when the unique specimen appeared. They later stormed into the Blue World and White World. Although the Seven Deadly Sins of Sloth himself have an ambition for invasion, he didn't issued any directions for it since he didn't made any concrete plans before.
They began massacre of humans in the Blue World and White World that has suffered enormous damage from Exorcision War. Accomplishing the "goal" that seemed to be impossible to achieve now suddenly becomes more realistic.