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docs/WOW_MAGE_NETHERWIND_PRESENCE.md

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+# WoW Mage Netherwind Presence
+
+## Source and selected behavior
+
+The local generated 3.3.5a talent node `talent-1846` is the authority for this
+custom Netherwind Presence mechanic. Its three rank rows are spells 44400,
+44402, and 44403. The rank tooltips explicitly grant 1%, 2%, or 3% spell haste
+per stack for 10 seconds, up to three stacks. Thus the maximum rank-1/2/3 haste
+is 3%/6%/9%. Each rank's DBC row reports a 100% Proc Trigger Spell effect and
+the class mask (`[536872960, 0, 0]`) is the same across ranks. The rank rows link
+to child spells 966120, 966121, and 966122, respectively, and each has
+`procChance` 100 with no generated `procFlags` field. No WotLKDB fallback was
+used: its stock spell 44400 is a different, permanent 2% Netherwind Presence
+effect and does not describe this local custom talent.
+
+The generated tooltip names seven trigger spells: Arcane Missiles, Arcane
+Barrage, Arcane Blast, Arcane Orb, Moonfire, Starfire, and Starsurge. The
+current generated Mage ability catalog contains Arcane Missiles, Arcane
+Barrage, and Arcane Blast. Arcane Orb is absent; Moonfire, Starfire, and
+Starsurge are Druid abilities in this project, not Mage catalog entries. They
+are kept in the source inventory but cannot trigger a Mage talent until the
+corresponding Mage actions exist. Slow is not a stacking trigger; it is the
+separate capstone action.
+
+## Runtime mapping and limits
+
+- One eligible spell cast commitment adds one stack, refreshes the 10-second
+  duration, and stops at three stacks. The local talent row does not include
+  proc phase flags, so awarding at accepted cast commitment is an explicit
+  event-phase inference. The runtime awards at most one stack per cast,
+  including one stack for a channel cast rather than one stack per missile
+  pulse. Failed or invalid casts do not reach this hook; a cast interrupted
+  after commitment keeps its stack, matching the chosen commitment-time
+  interpretation.
+- Each stack contributes the rank's 1%/2%/3% to the existing spell-haste aura
+  stat. The general talent parser skips this talent so its conditional haste
+  does not become an always-on bonus.
+- At max talent rank and three stacks, a Slow cast applies a separate 30%
+  movement-speed aura for three seconds. The tooltip does not say this consumes
+  Netherwind Presence, so the three haste stacks remain and keep their original
+  expiry.
+- The capstone aura is consumed by the player movement controller and generated
+  party companion follow controller, multiplying displacement by 1.3 while
+  active. Expired or differently targeted auras do not change movement. Runtime
+  tests verify the modifier and expiry; an in-scene movement playtest remains
+  useful to confirm feel and pathing.
+
+The implementation intentionally does not add substitute Mage spell rows for
+Arcane Orb, Moonfire, Starfire, or Starsurge. Adding them requires local
+class-attribution/ability data beyond Netherwind Presence itself.