The Sensorians, a newly formed warband of Slaanesh-worshipping Chaos Space Marines, treat with the Dark Mechanicum in an attempt to pioneer Daemon Engines equipped with suites of sonic weaponry. In doing so they learn of the sombre Skitarii of the forge world Agripinaa, ancestral enemies of the Eye of Terror’s machine-hereteks. Appalled by the notion that the Skitarii voluntarily exchange their flesh for cybernetic replacements, the Emperor’s Children stage a grand raid upon the planet under the cover of a Dark Mechanicum invasion. They capture several maniples of Skitarii, overloading their circuits with barrages of intense noise and deafening scrapcode, before bearing them back to the Eye of Terror. There they cut out the Skitarii’s bionics and replace them with fleshy equivalents taken from mutants, from corpses, even from fallen Chaos Spawn, until barely an ounce of metal is left. The Fleshlings of Sensoria, though driven mad by the process, prove a potent asset in the Long War,
