fix(Scripts/Dragonblight): make Alystros' Lapsing Dream affect players (#27356)

Co-authored-by: Claude Opus 5 (1M context) <[email protected]>

data/sql/updates/pending_db_world/rev_1787772549867487200.sql

@@ -0,0 +1,6 @@
+-- Alystros the Verdant Keeper - Lapsing Dream
+DELETE FROM `spell_script_names` WHERE `ScriptName` = 'spell_alystros_lapsing_dream_aura';
+INSERT INTO `spell_script_names` (`spell_id`, `ScriptName`) VALUES
+(51922, 'spell_alystros_lapsing_dream_aura');
+
+UPDATE `smart_scripts` SET `target_type` = 5, `target_param2` = 1 WHERE `entryorguid` = 27249 AND `source_type` = 0 AND `id` = 2;

src/server/scripts/Northrend/zone_dragonblight.cpp

@@ -2338,6 +2338,35 @@ class spell_dragonblight_devour_ghoul_periodic : public AuraScript
     }
 };
 
+enum LapsingDream
+{
+    SPELL_LAPSING_DREAM_SLOW = 51928
+};
+
+class spell_alystros_lapsing_dream_aura : public AuraScript
+{
+    PrepareAuraScript(spell_alystros_lapsing_dream_aura);
+
+    bool Validate(SpellInfo const* /*spellInfo*/) override
+    {
+        return ValidateSpellInfo({ SPELL_LAPSING_DREAM_SLOW });
+    }
+
+    void HandlePeriodic(AuraEffect const* /*aurEff*/)
+    {
+        PreventDefaultAction();
+
+        // default trigger makes the victim the caster, and 51928's area targets then find nobody
+        if (Unit* caster = GetCaster())
+            caster->AddAura(SPELL_LAPSING_DREAM_SLOW, GetTarget());
+    }
+
+    void Register() override
+    {
+        OnEffectPeriodic += AuraEffectPeriodicFn(spell_alystros_lapsing_dream_aura::HandlePeriodic, EFFECT_0, SPELL_AURA_PERIODIC_TRIGGER_SPELL);
+    }
+};
+
 void AddSC_dragonblight()
 {
     new npc_conversing_with_the_depths_trigger();
@@ -2368,4 +2397,5 @@ void AddSC_dragonblight()
     RegisterSpellScript(spell_dragonblight_flame_fury);
     RegisterSpellScript(spell_dragonblight_devour_ghoul);
     RegisterSpellScript(spell_dragonblight_devour_ghoul_periodic);
+    RegisterSpellScript(spell_alystros_lapsing_dream_aura);
 }