Scripts/Icecrown Citadel: Only one Mutated Abomination can exist during Professor Putricide encounter

Scripts/Spells: Added blizzlike error messages for certain spells
Scripts/Items: Removed obsolete scripts

src/server/game/AI/ScriptedAI/ScriptedCreature.cpp

@@ -81,6 +81,33 @@ void SummonList::DespawnAll()
     }
 }
 
+void SummonList::RemoveNotExisting()
+{
+    for (iterator i = begin(); i != end();)
+    {
+        if (Unit::GetCreature(*me, *i))
+            ++i;
+        else
+            erase(i++);
+    }
+}
+
+bool SummonList::HasEntry(uint32 entry)
+{
+    for (iterator i = begin(); i != end();)
+    {
+        Creature* summon = Unit::GetCreature(*me, *i);
+        if (!summon)
+            erase(i++);
+        else if (summon->GetEntry() == entry)
+            return true;
+        else
+            ++i;
+    }
+
+    return false;
+}
+
 ScriptedAI::ScriptedAI(Creature* pCreature) : CreatureAI(pCreature),
     me(pCreature),
     IsFleeing(false),

src/server/game/AI/ScriptedAI/ScriptedCreature.h

@@ -36,6 +36,8 @@ class SummonList : public std::list<uint64>
         void DespawnAll();
         void DoAction(uint32 entry, uint32 info);
         void DoZoneInCombat(uint32 entry = 0);
+        void RemoveNotExisting();
+        bool HasEntry(uint32 entry);
     private:
         Creature *me;
 };

src/server/game/Miscellaneous/SharedDefines.h

@@ -1045,7 +1045,7 @@ enum SpellCustomErrors
     SPELL_CUSTOM_ERROR_MUST_BE_DEATH_KNIGHT             = 33, // Only Death Knights may enter Ebon Hold.
     SPELL_CUSTOM_ERROR_MUST_BE_IN_FERAL_FORM            = 34, // Must be in Cat Form, Bear Form, or Dire Bear Form
     SPELL_CUSTOM_ERROR_MUST_BE_NEAR_HELPLESS_VILLAGER   = 35, // You must be within range of a Helpless Wintergarde Villager.
-    SPELL_CUSTOM_ERROR_MUST_TARGET_ELEMENTAL_MECHANICAL = 36, // You cannot target an elemental or mechanical corpse.
+    SPELL_CUSTOM_ERROR_CANT_TARGET_ELEMENTAL_MECHANICAL = 36, // You cannot target an elemental or mechanical corpse.
     SPELL_CUSTOM_ERROR_MUST_HAVE_USED_DALARAN_CRYSTAL   = 37, // This teleport crystal cannot be used until the teleport crystal in Dalaran has been used at least once.
     SPELL_CUSTOM_ERROR_YOU_ALREADY_HOLD_SOMETHING       = 38, // You are already holding something in your hand. You must throw the creature in your hand before picking up another.
     SPELL_CUSTOM_ERROR_YOU_DONT_HOLD_ANYTHING           = 39, // You don't have anything to throw! Find a Vargul and use Gymer Grab to pick one up!

src/server/game/Spells/SpellEffects.cpp

@@ -4826,15 +4826,6 @@ void Spell::EffectScriptEffect(SpellEffIndex effIndex)
                     if (unitTarget && m_originalCaster)
                         m_originalCaster->CastSpell(unitTarget, urand(0, 1) ? damage : 52505, true);
                     return;
-                // Death Gate
-                case 52751:
-                {
-                    if (!unitTarget || unitTarget->getClass() != CLASS_DEATH_KNIGHT)
-                        return;
-                    // triggered spell is stored in m_spellInfo->EffectBasePoints[0]
-                    unitTarget->CastSpell(unitTarget, damage, false);
-                    break;
-                }
                 case 53110: // Devour Humanoid
                     if (unitTarget)
                         unitTarget->CastSpell(m_caster, damage, true);