chapter 13 done

world/magic/exploits-log.md

@@ -197,6 +197,16 @@ Every exploit Phelan uses, logged for continuity tracking.
 - **Cross-reference:** Exploit #3 (death ward signature forgery) is the direct precedent. Both use signature acquisition → forgery → system manipulation. Key differences: Book 1 acquired signature externally (8+ passive observation cycles, exact match at 7 junctions); Book 2 acquired internally (being drained, within degraded tolerance window). Book 1 result was destruction (system consumed itself); Book 2 result is reprogramming (system survives but reversed). Philosophy evolves from "break the lock" to "change what the lock opens."
 - **Story significance:** Connection log serves as evidence of every victim drained (legal weight). Crystal survives as a trap — anyone in Book 3 who tries to use it gets drained. Locksmith identity elevated: doesn't break locks, changes what they open.
 
+## Observation: Drain Echo — Residual Channel Endpoint (Mere's Discovery)
+- **Chapter:** Ch13 (Book 2)
+- **Context:** Devod Fields drained by pre-Compact Mallory crystal (Ch12). Life force extracted, dramatic aging. Crystal removed from contact, but vitality not stabilizing as expected.
+- **Discovery:** Mere Fields identifies a drain echo — a residual channel endpoint left open in Devod's system after the crystal was removed. Pre-Compact crystal architecture doesn't just extract; it anchors a channel between crystal and target. Removing the crystal closes one end, but the target-side endpoint remains open, continuing a faint pull on the victim's vitality. Like pulling a nail out but leaving the wound open.
+- **Detection method:** Binding salts applied at pulse points (standard stabilization). Salts at the left wrist darkened faster than at other points — indicating active magical draw still occurring. Fresh salts confirmed: repeated darkening at the same location. Pattern recognition, not spellcasting.
+- **Treatment:** Concentrated binding salt compound (denser than standard) applied at the channel endpoint (left wrist). Binding salts' dampening properties close the residual channel. Confirmation: fresh salts hold their colour. Drain echo neutralized.
+- **Flaw Sight note:** Phelan's passive awareness detected a faint, diffuse sense of something off around Devod — but the drain echo was too faint and structureless for Flaw Sight to parse. Like hearing a hum you can't locate. The discovery belongs entirely to Mere's material-based detection.
+- **Significance:** Establishes that pre-Compact crystal draining leaves persistent aftereffects even after crystal removal. The "battery drain" model: Devod's vitality was drained (not his mage reserves — he is not a mage). Body capacity intact; recovery is natural regeneration once the echo is stopped. Permanent cost: 1-2 years of burned capacity from the most violent extraction phase (Devod 55 → settles at 56-57). Seeds Mere's Phase 2 treatment (restorative tonics, Ch14-21) and her later expertise in crystal damage recovery (applied to Kae's pain management, Ch19-21).
+- **Cross-reference:** Same crystal as Exploit #2 (Leon's Vethani Crypts recovery), Exploit #5 (credential harvest), Combat Log Ch09 (First Contact drain).
+
 ## Combat Log: First Contact with Kae — Crystal Drain Survived
 - **Chapter:** Ch09 (Book 2)
 - **Environment:** Ground-floor tenement unit, southern warrens. ~12x15 feet. Near-dark (past tenth bell, winter night). Furniture as obstacles: cot, dresser, table, chair. Room progressively destroyed during fight — cot catches fire, table flipped, chair shattered, walls scorched. Smoke filling ceiling.