# Vow of Silence and Lady Anacondra — 2026-10-04

## Finding

The full-fight record shows a successful Vow of Silence action against Lady Anacondra at `1791081712932`, but the matching cast remained active. The cast identity is `attackId: spell-9532`, `startedAt: 1791081712018`, `completesAt: 1791081713518`; the action occurred 914 ms after its start with 586 ms remaining. The result records `interruptObserved: false` and `sourceCastEndedBeforeScheduledCompletion: false`. The source cast after the action still has the same ID and timestamps. Vow resolves as an Arcane, zero-amount utility event, so that event is not evidence of a damage resistance or miss.

The failure was a false source immunity. The pinned AzerothCore `creature_template.sql` schema stores `CreatureImmunitiesId`, a row reference, rather than a literal mechanic bitmask. The importer had treated that negative row ID as a mask. At runtime, `applyStatus` rejects Silence and Interrupt when those names appear in `mob.mechanicImmunities`, which prevented both Vow effects from reaching the active cast.

## Source correction

The import source is AzerothCore commit `4d9d1d4b5723e819c5c390f6ca1177283dbfb8e3`, recorded by `azerothCoreSourceLock.json`. The additional source is `data/sql/base/db_world/creature_immunities.sql`, SHA-256 `aee81a1d8b99986f8498a2b4c51b64eaf4b9095a0d1a12bbf3705d9588a90a13` (70,706 bytes, 456 rows), preserved byte-for-byte under `dungeon-pipeline/source-fixtures/azerothcore-4d9d1d4b5723e819c5c390f6ca1177283dbfb8e3/` with its lock metadata.

Lady Anacondra (template 3671) references immunity row `-93`. That row has `SchoolMask=0` and `MechanicsMask=16777248` (`0x01000020`); its source comment identifies Fear and Horror as `mech=0x800010`. The source mechanic mask uses the enum's bit positions, while the established imported/runtime template mask uses the adjacent lower positions. The importer normalizes the source mechanic mask one bit right to `0x00800010`, then decodes exactly `fear` and `horror`. It imports the row's SchoolMask separately. This removes the invented Silence and Interrupt immunities without weakening any immunity declared by source. For example, row `-377` explicitly lists both Silence and Interrupt and still imports both.

The importer only loads the FK table when the parsed template schema declares `CreatureImmunitiesId`; older schemas continue to use literal `mechanic_immune_mask` and `spell_school_immune_mask` values. A nonzero FK missing from the source table fails closed. The generated reference changes only immunity fields: 646 of 1,671 creature templates have corrected mechanic immunity fields, and 30 also receive their FK-backed school immunity fields. Other template fields and counts are unchanged.

## Runtime check and limits

Vow of Silence is modeled as an 8.4-second Silence aura followed by an Interrupt effect; the player-target aura duration is 4.2 seconds. Applying Silence cancels a live nonphysical cast. Because that clears the cast before the following Interrupt effect runs, the effect sequence does not create a separate per-school lockout for the canceled Nature cast. The active Silence status itself suppresses new spell attacks during its duration. The regression therefore checks cast cancellation and the live Silence window, not a Nature school-lock timestamp.

The focused regression registers Lady through template 3671, stages the exact `spell-9532` cast with its source start/completion times, verifies cancellation, and advances through the original release time while checking the cast count does not increase. Other focused cases cover a RoM physical Trample against a player target, the generated companion path against a WoW Lightning Bolt, and an NPC whose source row really grants Silence and Interrupt immunity. That immune NPC keeps its cast and receives no Silence.

This is a source/import correction and focused runtime verification. The recorded historical full fight was not replayed after the change, and this report does not claim a new browser fight result.

## Validation

The focused Vitest selection passed 40/40 tests across `src/game/romPriestChampionRuntime.test.ts`, `src/game/wailingCavernsParity.test.ts`, `src/game/enemyCasting.test.ts`, `src/game/enemyDamageTypes.integration.test.ts`, and `src/game/enemySmartAiRuntime.test.ts`; the final revised Vow test file was rerun alone and passed 8/8. The importer regression file `scripts/dungeon-pipeline/import-azerothcore-world.test.mjs` passed 5/5 Node tests, and `node --check scripts/dungeon-pipeline/import-azerothcore-world.mjs` passed. The app TypeScript check and final build passed after the runtime-test edits. No full test suite or all-class sweep was run.