fix(Script/Sunwell): Adjust Singularity behaviors (#21919)

data/sql/updates/pending_db_world/rev_1744559106171295151.sql

@@ -0,0 +1,2 @@
+-- Singularity speed
+UPDATE `creature_template` SET `speed_walk` = 2, `speed_run` = 0.7142 WHERE (`entry` = 25855);

src/server/scripts/EasternKingdoms/SunwellPlateau/boss_muru.cpp

@@ -285,27 +285,50 @@ struct npc_singularity : public NullCreatureAI
         me->m_Events.AddEventAtOffset([&] {
             DoCastSelf(SPELL_BLACK_HOLE_VISUAL2, true);
             DoCastSelf(SPELL_BLACK_HOLE_PASSIVE, true);
+
+            // Start following players after visuals are complete
+            FindAndFollowTarget();
         }, 8s);
 
         me->m_Events.AddEventAtOffset([&] {
             me->KillSelf();
         }, 17s);
+    }
 
-        scheduler.Schedule(8s, [this](TaskContext context)
+    void FindAndFollowTarget()
+    {
+        scheduler.Schedule(1s, [this](TaskContext context)
         {
+            Player* target = nullptr;
+
             auto const& playerList = me->GetMap()->GetPlayers();
             for (auto const& playerRef : playerList)
             {
                 if (Player* player = playerRef.GetSource())
+                {
                     if (me->IsWithinLOSInMap(player) && player->IsAlive() && !player->HasAura(SPELL_BLACK_HOLE_EFFECT))
                     {
-                        me->GetMotionMaster()->MovePoint(0, player->GetPositionX(), player->GetPositionY(), player->GetPositionZ(), false, true);
+                        target = player;
-                        context.Repeat();
+                        break;
-                        return;
                     }
+                }
             }
 
-            context.Repeat(1s);
+            if (target)
+            {
+                me->GetMotionMaster()->Clear();
+                me->GetMotionMaster()->MoveFollow(target, 0.0f, 0.0f);
+
+                scheduler.Schedule(6s, [this](TaskContext)
+                {
+                    FindAndFollowTarget();
+                });
+            }
+            else
+            {
+                // No valid target found, check again soon
+                context.Repeat(1s);
+            }
         });
     }
 
@@ -410,7 +433,9 @@ class spell_entropius_black_hole_effect : public SpellScript
         if (target->GetDistance(GetCaster()) < 5.0f)
         {
             float o = frand(0, 2 * M_PI);
-            pos.Relocate(GetCaster()->GetPositionX() + 4.0f * cos(o), GetCaster()->GetPositionY() + 4.0f * std::sin(o), GetCaster()->GetPositionZ() + frand(10.0f, 15.0f));
+            pos.Relocate(GetCaster()->GetPositionX() + 8.0f * cos(o),
+                         GetCaster()->GetPositionY() + 8.0f * std::sin(o),
+                         GetCaster()->GetPositionZ() + frand(2.0f, 5.0f));
         }
         else
             pos.Relocate(GetCaster()->GetPositionX(), GetCaster()->GetPositionY(), GetCaster()->GetPositionZ() + 1.0f);