Implement aura Illusion Passive.

Closes #2206

sql/migrations/20231003163102_world.sql

@@ -0,0 +1,22 @@
+DROP PROCEDURE IF EXISTS add_migration;
+delimiter ??
+CREATE PROCEDURE `add_migration`()
+BEGIN
+DECLARE v INT DEFAULT 1;
+SET v = (SELECT COUNT(*) FROM `migrations` WHERE `id`='20231003163102');
+IF v=0 THEN
+INSERT INTO `migrations` VALUES ('20231003163102');
+-- Add your query below.
+
+
+-- Add missing aura Illusion Passive to mobs.
+UPDATE `creature_template` SET `auras`='7131' WHERE `entry` IN (4785, 5097, 6493, 6932, 11027, 11263);
+DELETE FROM `spell_proc_event` WHERE `entry`=7131;
+
+
+-- End of migration.
+END IF;
+END??
+delimiter ; 
+CALL add_migration();
+DROP PROCEDURE IF EXISTS add_migration;

src/game/UnitAuraProcHandler.cpp

@@ -570,6 +570,13 @@ SpellAuraProcResult Unit::HandleDummyAuraProc(Unit* pVictim, uint32 damage, Aura
         {
             switch (dummySpell->Id)
             {
+                // Illusion Passive
+                case 7131:
+                {
+                    if (Creature* pCreature = ToCreature())
+                        pCreature->DespawnOrUnsummon(1);
+                    return SPELL_AURA_PROC_OK;
+                }
 #if SUPPORTED_CLIENT_BUILD > CLIENT_BUILD_1_8_4
                 // Eye for an Eye
                 case 9799: