To the oppressed masses of a Genestealer Cult, the Kelermorph is a figure of folk legend, a revolutionary hero battling the uncaring cruelty of authoritarian rule. To the enemy he is a figure of dread, a hated anarch who seeks to tear down the foundations of civilisation. In reality the Kelermorph is something else entirely – a bioform created for the specific purpose of exploiting mortal psychology, a cold-blooded killer in the guise of a legendary gunfighter whose actions inspire generations of sedition and revolution.