Index: scripts/world/spell_scripts.cpp
===================================================================
--- scripts/world/spell_scripts.cpp	(revision 1683)
+++ scripts/world/spell_scripts.cpp	(working copy)
@@ -28,6 +28,7 @@
 spell 21014
 spell 29528
 spell 29866
+spell 45109
 spell 46770
 spell 46023
 spell 47575
@@ -167,6 +168,16 @@
     NPC_OWLKIN                          = 16518,
     NPC_OWLKIN_INOC                     = 16534,
 
+    // for quest 11541
+    NPC_DARKSPINE_SIREN                 = 25073,
+    NPC_GREENGILL_SLAVE                 = 25084,
+    NPC_FREED_GREENGILL_SLAVE           = 25085,
+    
+    SPELL_ORB_OF_MURLOC_CONTROL         = 45109,
+    SPELL_GREENGILL_SLAVE_FREED         = 45110,
+    SPELL_ENRAGE                        = 45111,
+    SPELL_MIND_CONTROL                  = 45112,
+
     // target for quest 12166)
     SPELL_LIQUID_FIRE                   = 46770,
     SPELL_LIQUID_FIRE_AURA              = 47972,
@@ -399,6 +410,25 @@
             }
             return true;
         }
+        case SPELL_ORB_OF_MURLOC_CONTROL:
+        {
+            if (uiEffIndex == EFFECT_INDEX_0)
+            {
+                if (pCaster->GetTypeId() == TYPEID_PLAYER && pCreatureTarget->HasAura(SPELL_MIND_CONTROL))
+                {
+                    pCreatureTarget->CastSpell(pCaster, SPELL_GREENGILL_SLAVE_FREED, true);
+                    pCreatureTarget->RemoveAurasDueToSpell(SPELL_MIND_CONTROL);
+                    pCreatureTarget->UpdateEntry(NPC_FREED_GREENGILL_SLAVE);
+                    pCreatureTarget->CastSpell(pCreatureTarget, SPELL_ENRAGE, true);
+                    Creature* pTarget = GetClosestCreatureWithEntry(pCreatureTarget, NPC_DARKSPINE_SIREN, 10.0f);
+                    if(pTarget)
+                        pCreatureTarget->AI()->AttackStart(pTarget);
+            
+                }
+                return true;
+            }
+            return true;
+        }
         case SPELL_LIQUID_FIRE:
         {
             if (uiEffIndex == EFFECT_INDEX_0)