# Enemy Bloodlust source contract — 2026-10-05

`src/game/enemyBloodlust.ts` records the sourced NPC contract for spell 6742
and exposes the melee swing-interval calculation used when independent
Aura 138 haste effects overlap. It models one explicitly selected friendly
creature per application. It does not infer Shaman player-party semantics from
the similarly named player spell.

## Pinned client rows

The active Ascension Spell.dbc is
`../LadiksMPQEditor/client-current/area-52/patch-D/DBFilesClient/Spell.dbc`
(SHA-256
`2f77f18b91ffbae32a19568e4bc05ec78ee384b6ba8dd2a6e05f0e97abbb2dce`). The
Epoch Spell.dbc is
`../HealerMan-Storage/pipeline-work/dungeons/epoch-client/DBFilesClient/Spell.dbc`
(SHA-256
`d5cce1a83550dcfa9eb2f0251dbb11fd24c272534b2b1a9b230924a44d817ab3`). Both
contain the same spell 6742 fields:

| Spell.dbc field | Value |
| --- | ---: |
| Range index | 4 |
| School mask / damage class | 8 / 1 |
| Duration index / resolved duration | 9 / 30,000 ms |
| Dispel / stack amount | 1 (Magic) / 0 |
| Attributes 0–7 | 0 |
| Effect | 6 (`APPLY_AURA`) |
| Aura / base points | 138 (`MOD_MELEE_HASTE`) / +30 |
| Implicit targets A / B | 21 (`TARGET_UNIT_TARGET_ALLY`) / 0 |
| Radius / misc value / period | 0 / 0 / 0 |
| Trigger spell | 0 |

The duration comes from the pinned shared patch-S SpellDuration.dbc
(`eeae44ef0185924f3d6ec57ab2701c66566db86e51ab0bae017a9449126eb3a0`); the
shared SpellRadius.dbc fallback is
`dba6ed2f165f75c84dda5f32ae46b1a01fe562efd88fa51fd19365705c3e6a44`. SpellRange
index 4 comes from shared patch-S SpellRange.dbc (SHA-256
`bb899631818942a7a7100abfb7a970612a79ac99637b1b459561e2b108125ddd`): both
friendly and hostile ranges are 0–30 yards, with flags 0. This row and the
effect target describe a selected friendly unit, not an area target; the
effect has no radius.

## Historical NPC selection and cast gates

The read-only AzerothCore world snapshot's `creature_template_spell.sql` lists
Hamhock (entry 1717) with spells 6742 and 421. Its `smart_scripts.sql` rows
provide two separate Bloodlust paths:

- Update-in-combat event 0 has a fixed 5,000 ms initial delay, no repeat timer,
  100% chance, and NOT_REPEATABLE flag 1. It casts spell 6742 with cast flags
  32 (`SMARTCAST_AURA_NOT_PRESENT`) on target type 1 (self). AzerothCore only
  processes this event while Hamhock is engaged; the cast flag skips recasting
  while that target already has Bloodlust.
- Friendly-missing-buff event 16 uses spell 6742, radius 30, repeat interval
  10,000 ms, and `onlyInCombat=0`. It casts spell 6742 with flags 0 on target
  type 7 (`SMART_TARGET_ACTION_INVOKER`), the selected missing-buff recipient.
  The event starts active without an initial delay and resets its 10-second
  repeat timer after it processes a recipient.

The historical `FriendlyMissingBuffInRange` predicate further requires the
candidate creature to be alive, in combat, non-hostile to the caster, within
30 yards on the same map and phase, and missing spell 6742. The search uses a
creature-list searcher, so this AI path selects creatures rather than the
player party. Its predicate has no self-exclusion or line-of-sight check;
the normal, untriggered cast still uses ordinary spell validation. Distance
checks include the source and target object sizes. These are source gates; the
current game entity state has no faction, phase, or collision-radius data and
must document its corresponding selection approximation.

## Haste stacking

AzerothCore maps Aura 138 to `HandleModMeleeSpeedPct`, which applies a separate
percentage attack-speed factor to main-hand and off-hand swing intervals. The
same-effect spell-group lookup suppresses weaker members only when the data
places them in an exclusive group. The historical `spell_group.sql` does not
place either 6742 or Enrage 8599 in its “Melee Haste Buffs” group. Their two
+30% effects therefore combine as separate factors: an active Bloodlust and
Enrage yield `1 / (1.3 × 1.3)`, or about 0.591716 of the prior swing interval.
They do not become one additive +60% modifier (0.625 interval factor).

`enemyMeleeHasteIntervalMultiplier` applies the sourced positive and negative
Aura 138 interval factors to marked source modifiers in the already-filtered
active aura list for one enemy, then preserves the existing additive interval
calculation for unmarked haste modifiers. It leaves auto-attack ability
cooldowns and unrelated haste channels unchanged. The Bloodlust contract
itself exposes only melee haste, Magic dispel, a 30-second duration, and the
explicit-friendly 30-yard target shape.

Focused validation is `npx vitest run src/game/enemyBloodlust.test.ts src/game/enemyBloodlust.integration.test.ts`.