A death world on the edge of the Menazoid Clasp, Epsilon was the site of three shrines to Chaos, designated Primaris, Secundus and Tertius by Imperial tacticians. Beneath Shrine Target Primaris was a Standard Template Constructor, a relic from over ten millennia before the events of "First and Only", which made Iron Men, a pattern of robotic warriors; the traitorous General Dravere, assisted by the mutated, radical Inquisitor Heldane, Colonel Draker Flense and his Jantine Patricians attempted to seize power and overturn the commander of the Sabbat Worlds Crusade, Warmaster Macaroth, using the Iron Men. However, the machine was corrupted by Chaos and Commissar Gaunt destroyed it, despite the psychic puppetry of the Inquisitor, who died after his "instrument" – Imperial Agent Fereyd, the man into whom Heldane had extended his consciousness – was explosively killed. Colonel Flense also attempted to get his revenge on Gaunt and the Ghosts, as Gaunt had field-executed Flense's father, General Aldo Dercius, many years previously. The Jantine shock troops annihilated the Tanith Seventh platoon commanded by Sergeant Blane, but were themselves killed to a man by Gaunt's allies, the Vitrian Dragoons. Gaunt stabbed Flense to death beneath Target Primaris, before escaping along with his men.