Ren leads an operational survey of the dead heart chamber, finding the cistern dark, cold, and scattered with inert boneglass fragments. He pockets a fragment as data.
The eastern campaign opens with three days of rain as scouts discover demons are now strategically hunting observation posts. Two scouts die: Doss killed when a Class Two demon uses adapted biomechanics to overcome the evasion technique, and Fenn killed by a sixth demon Ren missed in his count.
Ren walks through medical tents witnessing hundreds of branded soldiers between human and weapon. Finds Nella among the functional cases — she articulates precisely what the brands took, her clinical awareness itself a symptom. Thune's boneglass suppression offers theoretical hope for reversal.
Ren observes Nella struggling three times to retrieve Fossick's name, each pause a symptom of her third brand's emotional degradation. At the camp perimeter, Nella articulates the damage precisely: her memories remain intact but are emotionally drained, flat and accessible but empty of resonance.
Something with inhuman footstep patterns follows the group through the night. After setting concentric alarm networks at camp, Ren spots a cracked-porcelain skinned demon at the outer perimeter during his watch.
Ren leads a 6-person team through the fortress drainage tunnels, bypasses a sentry demon using smoke compounds, and reaches the heart chamber — a massive boneglass organ ten feet across pulsing with a slow heartbeat in the central cistern.
Thune summons Ren to his spartan tent for the eastern advance briefing, revealing that 37 brands have reduced him to near-mechanical precision. Ren probes for the human behind the weapon and receives the haunting admission: I was a farmer. I think.
Lethane summons Ren and confesses she always knew other gods existed — maintained the lie for unity. No apology: 'Make sure it's worth the cost.' Then Callum faces his personal cost: Sister Dael arrested for distributing heretical texts.
Intelligence from multiple fronts converges on a single point in the Sunderlands called the Crucible, identified as the source of the demonic plague and all boneglass networks. Lethane declares an all-or-nothing campaign to destroy it.