diff --git a/apps/openmw/mwgui/spellicons.cpp b/apps/openmw/mwgui/spellicons.cpp
index 8a501e598..e6a10ee32 100644
--- a/apps/openmw/mwgui/spellicons.cpp
+++ b/apps/openmw/mwgui/spellicons.cpp
@@ -25,8 +25,8 @@
 namespace MWGui
 {
 
-    void EffectSourceVisitor::visit (MWMechanics::EffectKey key,
-                                           const std::string& sourceName, const std::string& sourceId, int casterActorId,
+    void EffectSourceVisitor::visit (MWMechanics::EffectKey key, int effectIndex,
+                                     const std::string& sourceName, const std::string& sourceId, int casterActorId,
                                      float magnitude, float remainingTime, float totalTime)
     {
         MagicEffectInfo newEffectSource;
diff --git a/apps/openmw/mwgui/spellicons.hpp b/apps/openmw/mwgui/spellicons.hpp
index 26761f2fc..67351688f 100644
--- a/apps/openmw/mwgui/spellicons.hpp
+++ b/apps/openmw/mwgui/spellicons.hpp
@@ -46,8 +46,8 @@ namespace MWGui
 
         virtual ~EffectSourceVisitor() {}
 
-        virtual void visit (MWMechanics::EffectKey key,
-                                 const std::string& sourceName, const std::string& sourceId, int casterActorId,
+        virtual void visit (MWMechanics::EffectKey key, int effectIndex,
+                            const std::string& sourceName, const std::string& sourceId, int casterActorId,
                             float magnitude, float remainingTime = -1, float totalTime = -1);
     };
 
diff --git a/apps/openmw/mwmechanics/activespells.cpp b/apps/openmw/mwmechanics/activespells.cpp
index 2ccffcc91..928293e64 100644
--- a/apps/openmw/mwmechanics/activespells.cpp
+++ b/apps/openmw/mwmechanics/activespells.cpp
@@ -210,9 +210,8 @@ namespace MWMechanics
                 std::string name = it->second.mDisplayName;
 
                 float magnitude = effectIt->mMagnitude;
-
                 if (magnitude)
-                    visitor.visit(MWMechanics::EffectKey(effectIt->mEffectId, effectIt->mArg), name, it->first, it->second.mCasterActorId, magnitude, effectIt->mTimeLeft, effectIt->mDuration);
+                    visitor.visit(MWMechanics::EffectKey(effectIt->mEffectId, effectIt->mArg), effectIt->mEffectIndex, name, it->first, it->second.mCasterActorId, magnitude, effectIt->mTimeLeft, effectIt->mDuration);
             }
         }
     }
@@ -258,14 +257,14 @@ namespace MWMechanics
         mSpellsChanged = true;
     }
 
-    void ActiveSpells::purgeEffect(short effectId, const std::string& sourceId)
+    void ActiveSpells::purgeEffect(short effectId, const std::string& sourceId, int effectIndex)
     {
         for (TContainer::iterator it = mSpells.begin(); it != mSpells.end(); ++it)
         {
             for (std::vector<ActiveEffect>::iterator effectIt = it->second.mEffects.begin();
                  effectIt != it->second.mEffects.end();)
             {
-                if (effectIt->mEffectId == effectId && it->first == sourceId)
+                if (effectIt->mEffectId == effectId && it->first == sourceId && (effectIndex < 0 || effectIndex == effectIt->mEffectIndex))
                     effectIt = it->second.mEffects.erase(effectIt);
                 else
                     ++effectIt;
diff --git a/apps/openmw/mwmechanics/activespells.hpp b/apps/openmw/mwmechanics/activespells.hpp
index 9a1783bc9..4d36c717e 100644
--- a/apps/openmw/mwmechanics/activespells.hpp
+++ b/apps/openmw/mwmechanics/activespells.hpp
@@ -85,7 +85,7 @@ namespace MWMechanics
             void purgeEffect (short effectId);
 
             /// Remove all active effects with this effect id and source id
-            void purgeEffect (short effectId, const std::string& sourceId);
+            void purgeEffect (short effectId, const std::string& sourceId, int effectIndex=-1);
 
             /// Remove all active effects, if roll succeeds (for each effect)
             void purgeAll(float chance, bool spellOnly = false);
diff --git a/apps/openmw/mwmechanics/actors.cpp b/apps/openmw/mwmechanics/actors.cpp
index 14a2e17c9..21f71ce5d 100644
--- a/apps/openmw/mwmechanics/actors.cpp
+++ b/apps/openmw/mwmechanics/actors.cpp
@@ -88,12 +88,13 @@ class CheckActorCommanded : public MWMechanics::EffectSourceVisitor
     MWWorld::Ptr mActor;
 public:
     bool mCommanded;
+
     CheckActorCommanded(const MWWorld::Ptr& actor)
         : mActor(actor)
-    , mCommanded(false){}
+        , mCommanded(false){}
 
-    virtual void visit (MWMechanics::EffectKey key,
-                             const std::string& sourceName, const std::string& sourceId, int casterActorId,
+    virtual void visit (MWMechanics::EffectKey key, int effectIndex,
+                        const std::string& sourceName, const std::string& sourceId, int casterActorId,
                         float magnitude, float remainingTime = -1, float totalTime = -1)
     {
         if (((key.mId == ESM::MagicEffect::CommandHumanoid && mActor.getClass().isNpc())
@@ -156,8 +157,8 @@ namespace MWMechanics
         GetStuntedMagickaDuration(const MWWorld::Ptr& actor)
             : mRemainingTime(0.f){}
 
-        virtual void visit (MWMechanics::EffectKey key,
-                                const std::string& sourceName, const std::string& sourceId, int casterActorId,
+        virtual void visit (MWMechanics::EffectKey key, int effectIndex,
+                            const std::string& sourceName, const std::string& sourceId, int casterActorId,
                             float magnitude, float remainingTime = -1, float totalTime = -1)
         {
             if (mRemainingTime == -1) return;
@@ -186,8 +187,8 @@ namespace MWMechanics
         {
         }
 
-        virtual void visit (MWMechanics::EffectKey key,
-                                 const std::string& sourceName, const std::string& sourceId, int casterActorId,
+        virtual void visit (MWMechanics::EffectKey key, int effectIndex,
+                            const std::string& sourceName, const std::string& sourceId, int casterActorId,
                             float magnitude, float remainingTime = -1, float totalTime = -1)
         {
             if (magnitude <= 0)
@@ -206,8 +207,8 @@ namespace MWMechanics
     {
 
     public:
-        virtual void visit (MWMechanics::EffectKey key,
-                                 const std::string& sourceName, const std::string& sourceId, int casterActorId,
+        virtual void visit (MWMechanics::EffectKey key, int effectIndex,
+                            const std::string& sourceName, const std::string& sourceId, int casterActorId,
                             float magnitude, float remainingTime = -1, float totalTime = -1)
         {
             if (key.mId != ESM::MagicEffect::Corprus)
@@ -231,8 +232,8 @@ namespace MWMechanics
         {
         }
 
-        virtual void visit (MWMechanics::EffectKey key,
-                                 const std::string& sourceName, const std::string& sourceId, int casterActorId,
+        virtual void visit (MWMechanics::EffectKey key, int effectIndex,
+                            const std::string& sourceName, const std::string& sourceId, int casterActorId,
                             float magnitude, float remainingTime = -1, float totalTime = -1)
         {
             if (mTrapped)
@@ -894,7 +895,7 @@ namespace MWMechanics
             {
             }
 
-            virtual void visit (MWMechanics::EffectKey key,
+            virtual void visit (MWMechanics::EffectKey key, int /*effectIndex*/,
                                 const std::string& /*sourceName*/, const std::string& /*sourceId*/, int /*casterActorId*/,
                                 float magnitude, float remainingTime = -1, float /*totalTime*/ = -1)
             {
@@ -1196,6 +1197,7 @@ namespace MWMechanics
         {
             UpdateSummonedCreatures updateSummonedCreatures(ptr);
             creatureStats.getActiveSpells().visitEffectSources(updateSummonedCreatures);
+            creatureStats.getSpells().visitEffectSources(updateSummonedCreatures);
             if (ptr.getClass().hasInventoryStore(ptr))
                 ptr.getClass().getInventoryStore(ptr).visitEffectSources(updateSummonedCreatures);
             updateSummonedCreatures.process(mTimerDisposeSummonsCorpses == 0.f);
diff --git a/apps/openmw/mwmechanics/creaturestats.hpp b/apps/openmw/mwmechanics/creaturestats.hpp
index 5e91a1b5a..9a1996ddb 100644
--- a/apps/openmw/mwmechanics/creaturestats.hpp
+++ b/apps/openmw/mwmechanics/creaturestats.hpp
@@ -84,7 +84,7 @@ namespace MWMechanics
         float mSideMovementAngle;
 
     public:
-        typedef std::pair<int, std::string> SummonKey; // <ESM::MagicEffect index, spell ID>
+        typedef std::tuple<int, std::string, int> SummonKey; // <ESM::MagicEffect index, source ID, effect index>
     private:
         std::map<SummonKey, int> mSummonedCreatures; // <SummonKey, ActorId>
 
diff --git a/apps/openmw/mwmechanics/linkedeffects.cpp b/apps/openmw/mwmechanics/linkedeffects.cpp
index 364358433..b0defac7d 100644
--- a/apps/openmw/mwmechanics/linkedeffects.cpp
+++ b/apps/openmw/mwmechanics/linkedeffects.cpp
@@ -58,6 +58,7 @@ namespace MWMechanics
         std::vector<ActiveSpells::ActiveEffect> absorbEffects;
         ActiveSpells::ActiveEffect absorbEffect = appliedEffect;
         absorbEffect.mMagnitude *= -1;
+        absorbEffect.mEffectIndex = appliedEffect.mEffectIndex;
         absorbEffects.emplace_back(absorbEffect);
 
         // Morrowind negates reflected Absorb spells so the original caster won't be harmed.
diff --git a/apps/openmw/mwmechanics/magiceffects.hpp b/apps/openmw/mwmechanics/magiceffects.hpp
index 86f5a1804..12735a87f 100644
--- a/apps/openmw/mwmechanics/magiceffects.hpp
+++ b/apps/openmw/mwmechanics/magiceffects.hpp
@@ -74,8 +74,8 @@ namespace MWMechanics
     {
         virtual ~EffectSourceVisitor() { }
 
-        virtual void visit (MWMechanics::EffectKey key,
-                                 const std::string& sourceName, const std::string& sourceId, int casterActorId,
+        virtual void visit (EffectKey key, int effectIndex,
+                            const std::string& sourceName, const std::string& sourceId, int casterActorId,
                             float magnitude, float remainingTime = -1, float totalTime = -1) = 0;
     };
 
diff --git a/apps/openmw/mwmechanics/spellabsorption.cpp b/apps/openmw/mwmechanics/spellabsorption.cpp
index f38fd78e2..f22cef3f6 100644
--- a/apps/openmw/mwmechanics/spellabsorption.cpp
+++ b/apps/openmw/mwmechanics/spellabsorption.cpp
@@ -23,8 +23,8 @@ namespace MWMechanics
 
         GetAbsorptionProbability() = default;
 
-        virtual void visit (MWMechanics::EffectKey key,
-                                const std::string& /*sourceName*/, const std::string& /*sourceId*/, int /*casterActorId*/,
+        virtual void visit (MWMechanics::EffectKey key, int /*effectIndex*/,
+                            const std::string& /*sourceName*/, const std::string& /*sourceId*/, int /*casterActorId*/,
                             float magnitude, float /*remainingTime*/, float /*totalTime*/)
         {
             if (key.mId == ESM::MagicEffect::SpellAbsorption)
diff --git a/apps/openmw/mwmechanics/spellcasting.cpp b/apps/openmw/mwmechanics/spellcasting.cpp
index 9f7108239..fb195bb6d 100644
--- a/apps/openmw/mwmechanics/spellcasting.cpp
+++ b/apps/openmw/mwmechanics/spellcasting.cpp
@@ -121,8 +121,9 @@ namespace MWMechanics
         // Try absorbing the spell. Some handling must still happen for absorbed effects.
         bool absorbed = absorbSpell(spell, caster, target);
 
+        int currentEffectIndex = 0;
         for (std::vector<ESM::ENAMstruct>::const_iterator effectIt (effects.mList.begin());
-             !target.isEmpty() && effectIt != effects.mList.end(); ++effectIt)
+             !target.isEmpty() && effectIt != effects.mList.end(); ++effectIt, ++currentEffectIndex)
         {
             if (effectIt->mRange != range)
                 continue;
@@ -189,6 +190,7 @@ namespace MWMechanics
                     effect.mArg = MWMechanics::EffectKey(*effectIt).mArg;
                     effect.mMagnitude = magnitude;
                     effect.mTimeLeft = 0.f;
+                    effect.mEffectIndex = currentEffectIndex;
 
                     // Avoid applying absorb effects if the caster is the target
                     // We still need the spell to be added
@@ -268,7 +270,7 @@ namespace MWMechanics
                 if (isSummoningEffect(effectIt->mEffectID) && !target.isEmpty() && target.getClass().isActor())
                 {
                     CreatureStats& targetStats = target.getClass().getCreatureStats(target);
-                    std::map<CreatureStats::SummonKey, int>::iterator findCreature = targetStats.getSummonedCreatureMap().find(std::make_pair(effectIt->mEffectID, mId));
+                    std::map<CreatureStats::SummonKey, int>::iterator findCreature = targetStats.getSummonedCreatureMap().find(std::make_tuple(effectIt->mEffectID, mId, currentEffectIndex));
                     if (findCreature != targetStats.getSummonedCreatureMap().end())
                     {
                         MWBase::Environment::get().getMechanicsManager()->cleanupSummonedCreature(target, findCreature->second);
diff --git a/apps/openmw/mwmechanics/spells.cpp b/apps/openmw/mwmechanics/spells.cpp
index a66c267cc..d292c015d 100644
--- a/apps/openmw/mwmechanics/spells.cpp
+++ b/apps/openmw/mwmechanics/spells.cpp
@@ -50,7 +50,10 @@ namespace MWMechanics
                 for (const auto& effect : spell->mEffects.mList)
                 {
                     if (iter.second.mPurgedEffects.find(i) != iter.second.mPurgedEffects.end())
+                    {
+                        ++i;
                         continue; // effect was purged
+                    }
 
                     float random = 1.f;
                     if (iter.second.mEffectRands.find(i) != iter.second.mEffectRands.end())
@@ -108,7 +111,7 @@ namespace MWMechanics
 
             SpellParams params;
             params.mEffectRands = random;
-            mSpells.insert (std::make_pair (spell, params));
+            mSpells.emplace(spell, params);
             mSpellsChanged = true;
         }
     }
@@ -272,7 +275,8 @@ namespace MWMechanics
             const ESM::Spell * spell = it.first;
             for (const auto& effectIt : it.second)
             {
-                visitor.visit(effectIt.first, spell->mName, spell->mId, -1, effectIt.second.getMagnitude());
+                // FIXME: since Spells merges effects with the same ID, there is no sense to use multiple effects with same ID here
+                visitor.visit(effectIt.first, -1, spell->mName, spell->mId, -1, effectIt.second.getMagnitude());
             }
         }
     }
@@ -308,20 +312,24 @@ namespace MWMechanics
 
     void Spells::purgeEffect(int effectId, const std::string & sourceId)
     {
-        const ESM::Spell * spell = SpellList::getSpell(sourceId);
+        // Effect source may be not a spell
+        const ESM::Spell * spell = MWBase::Environment::get().getWorld()->getStore().get<ESM::Spell>().search(sourceId);
+        if (spell == nullptr)
+            return;
+
         auto spellIt = mSpells.find(spell);
         if (spellIt == mSpells.end())
             return;
 
-        int i = 0;
+        int index = 0;
         for (auto& effectIt : spellIt->first->mEffects.mList)
         {
             if (effectIt.mEffectID == effectId)
             {
-                spellIt->second.mPurgedEffects.insert(i);
+                spellIt->second.mPurgedEffects.insert(index);
                 mSpellsChanged = true;
             }
-            ++i;
+            ++index;
         }
     }
 
@@ -441,7 +449,7 @@ namespace MWMechanics
                 ESM::SpellState::SpellParams params;
                 params.mEffectRands = it.second.mEffectRands;
                 params.mPurgedEffects = it.second.mPurgedEffects;
-                state.mSpells.insert(std::make_pair(it.first->mId, params));
+                state.mSpells.emplace(it.first->mId, params);
             }
         }
 
diff --git a/apps/openmw/mwmechanics/summoning.cpp b/apps/openmw/mwmechanics/summoning.cpp
index 03fd0d681..acb58ea8e 100644
--- a/apps/openmw/mwmechanics/summoning.cpp
+++ b/apps/openmw/mwmechanics/summoning.cpp
@@ -65,11 +65,11 @@ namespace MWMechanics
     {
     }
 
-    void UpdateSummonedCreatures::visit(EffectKey key, const std::string &sourceName, const std::string &sourceId, int casterActorId, float magnitude, float remainingTime, float totalTime)
+    void UpdateSummonedCreatures::visit(EffectKey key, int effectIndex, const std::string &sourceName, const std::string &sourceId, int casterActorId, float magnitude, float remainingTime, float totalTime)
     {
         if (isSummoningEffect(key.mId) && magnitude > 0)
         {
-            mActiveEffects.insert(std::make_pair(key.mId, sourceId));
+            mActiveEffects.insert(std::make_tuple(key.mId, sourceId, effectIndex));
         }
     }
 
@@ -78,12 +78,12 @@ namespace MWMechanics
         MWMechanics::CreatureStats& creatureStats = mActor.getClass().getCreatureStats(mActor);
         std::map<CreatureStats::SummonKey, int>& creatureMap = creatureStats.getSummonedCreatureMap();
 
-        for (std::set<std::pair<int, std::string> >::iterator it = mActiveEffects.begin(); it != mActiveEffects.end(); ++it)
+        for (std::set<CreatureStats::SummonKey>::iterator it = mActiveEffects.begin(); it != mActiveEffects.end(); ++it)
         {
-            bool found = creatureMap.find(std::make_pair(it->first, it->second)) != creatureMap.end();
+            bool found = creatureMap.find(*it) != creatureMap.end();
             if (!found)
             {
-                std::string creatureID = getSummonedCreature(it->first);
+                std::string creatureID = getSummonedCreature(std::get<0>(*it));
                 if (!creatureID.empty())
                 {
                     int creatureActorId = -1;
@@ -115,7 +115,7 @@ namespace MWMechanics
                         // still insert into creatureMap so we don't try to spawn again every frame, that would spam the warning log
                     }
 
-                    creatureMap.insert(std::make_pair(*it, creatureActorId));
+                    creatureMap.emplace(*it, creatureActorId);
                 }
             }
         }
@@ -149,9 +149,10 @@ namespace MWMechanics
             if (ptr.isEmpty() || (ptr.getClass().getCreatureStats(ptr).isDead() && ptr.getClass().getCreatureStats(ptr).isDeathAnimationFinished()))
             {
                 // Purge the magic effect so a new creature can be summoned if desired
-                creatureStats.getActiveSpells().purgeEffect(it->first.first, it->first.second);
+                creatureStats.getActiveSpells().purgeEffect(std::get<0>(it->first), std::get<1>(it->first), std::get<2>(it->first));
+                creatureStats.getSpells().purgeEffect(std::get<0>(it->first), std::get<1>(it->first));
                 if (mActor.getClass().hasInventoryStore(mActor))
-                    mActor.getClass().getInventoryStore(mActor).purgeEffect(it->first.first, it->first.second);
+                    mActor.getClass().getInventoryStore(mActor).purgeEffect(std::get<0>(it->first), std::get<1>(it->first), false, std::get<2>(it->first));
 
                 MWBase::Environment::get().getMechanicsManager()->cleanupSummonedCreature(mActor, it->second);
                 creatureMap.erase(it++);
diff --git a/apps/openmw/mwmechanics/summoning.hpp b/apps/openmw/mwmechanics/summoning.hpp
index f24413120..78a1969a9 100644
--- a/apps/openmw/mwmechanics/summoning.hpp
+++ b/apps/openmw/mwmechanics/summoning.hpp
@@ -20,8 +20,8 @@ namespace MWMechanics
         UpdateSummonedCreatures(const MWWorld::Ptr& actor);
         virtual ~UpdateSummonedCreatures() = default;
 
-        virtual void visit (MWMechanics::EffectKey key,
-                                 const std::string& sourceName, const std::string& sourceId, int casterActorId,
+        virtual void visit (MWMechanics::EffectKey key, int effectIndex,
+                            const std::string& sourceName, const std::string& sourceId, int casterActorId,
                             float magnitude, float remainingTime = -1, float totalTime = -1);
 
         /// To call after all effect sources have been visited
@@ -30,7 +30,7 @@ namespace MWMechanics
     private:
         MWWorld::Ptr mActor;
 
-        std::set<std::pair<int, std::string> > mActiveEffects;
+        std::set<std::tuple<int, std::string, int>> mActiveEffects;
     };
 
 }
diff --git a/apps/openmw/mwworld/inventorystore.cpp b/apps/openmw/mwworld/inventorystore.cpp
index ada211470..d67a22884 100644
--- a/apps/openmw/mwworld/inventorystore.cpp
+++ b/apps/openmw/mwworld/inventorystore.cpp
@@ -917,7 +917,7 @@ void MWWorld::InventoryStore::visitEffectSources(MWMechanics::EffectSourceVisito
             float magnitude = effect.mMagnMin + (effect.mMagnMax - effect.mMagnMin) * params.mRandom;
             magnitude *= params.mMultiplier;
             if (magnitude > 0)
-                visitor.visit(MWMechanics::EffectKey(effect), (**iter).getClass().getName(**iter), (**iter).getCellRef().getRefId(), -1, magnitude);
+                visitor.visit(MWMechanics::EffectKey(effect), i-1, (**iter).getClass().getName(**iter), (**iter).getCellRef().getRefId(), -1, magnitude);
         }
     }
 }
@@ -931,7 +931,7 @@ void MWWorld::InventoryStore::purgeEffect(short effectId, bool wholeSpell)
     }
 }
 
-void MWWorld::InventoryStore::purgeEffect(short effectId, const std::string &sourceId, bool wholeSpell)
+void MWWorld::InventoryStore::purgeEffect(short effectId, const std::string &sourceId, bool wholeSpell, int effectIndex)
 {
     TEffectMagnitudes::iterator effectMagnitudeIt = mPermanentMagicEffectMagnitudes.find(sourceId);
     if (effectMagnitudeIt == mPermanentMagicEffectMagnitudes.end())
@@ -964,6 +964,9 @@ void MWWorld::InventoryStore::purgeEffect(short effectId, const std::string &sou
                 if (effectIt->mEffectID != effectId)
                     continue;
 
+                if (effectIndex >= 0 && effectIndex != i)
+                    continue;
+
                 if (wholeSpell)
                 {
                     mPermanentMagicEffectMagnitudes.erase(sourceId);
diff --git a/apps/openmw/mwworld/inventorystore.hpp b/apps/openmw/mwworld/inventorystore.hpp
index d597e5f30..97ca931e7 100644
--- a/apps/openmw/mwworld/inventorystore.hpp
+++ b/apps/openmw/mwworld/inventorystore.hpp
@@ -206,7 +206,7 @@ namespace MWWorld
             void purgeEffect (short effectId, bool wholeSpell = false);
             ///< Remove a magic effect
 
-            void purgeEffect (short effectId, const std::string& sourceId, bool wholeSpell = false);
+            void purgeEffect (short effectId, const std::string& sourceId, bool wholeSpell = false, int effectIndex=-1);
             ///< Remove a magic effect
 
             virtual void clear();
diff --git a/apps/openmw/mwworld/worldimp.cpp b/apps/openmw/mwworld/worldimp.cpp
index dafd84388..265a7663c 100644
--- a/apps/openmw/mwworld/worldimp.cpp
+++ b/apps/openmw/mwworld/worldimp.cpp
@@ -3119,7 +3119,7 @@ namespace MWWorld
         {
         }
 
-        virtual void visit (MWMechanics::EffectKey key,
+        virtual void visit (MWMechanics::EffectKey key, int /*effectIndex*/,
                             const std::string& /*sourceName*/, const std::string& /*sourceId*/, int /*casterActorId*/,
                             float /*magnitude*/, float /*remainingTime*/ = -1, float /*totalTime*/ = -1)
         {
diff --git a/components/esm/activespells.cpp b/components/esm/activespells.cpp
index 46558ceb7..4017a4933 100644
--- a/components/esm/activespells.cpp
+++ b/components/esm/activespells.cpp
@@ -24,6 +24,7 @@ namespace ESM
                     esm.writeHNT ("ARG_", effectIt->mArg);
                 esm.writeHNT ("MAGN", effectIt->mMagnitude);
                 esm.writeHNT ("DURA", effectIt->mDuration);
+                esm.writeHNT ("EIND", effectIt->mEffectIndex);
                 esm.writeHNT ("LEFT", effectIt->mTimeLeft);
             }
         }
@@ -53,6 +54,8 @@ namespace ESM
                 esm.getHNOT(effect.mArg, "ARG_");
                 esm.getHNT (effect.mMagnitude, "MAGN");
                 esm.getHNT (effect.mDuration, "DURA");
+                effect.mEffectIndex = -1;
+                esm.getHNOT (effect.mEffectIndex, "EIND");
                 if (format < 9)
                     effect.mTimeLeft = effect.mDuration;
                 else
diff --git a/components/esm/activespells.hpp b/components/esm/activespells.hpp
index 20b2f652d..1b7f8b319 100644
--- a/components/esm/activespells.hpp
+++ b/components/esm/activespells.hpp
@@ -22,6 +22,7 @@ namespace ESM
         int mArg; // skill or attribute
         float mDuration;
         float mTimeLeft;
+        int mEffectIndex;
     };
 
     // format 0, saved games only
diff --git a/components/esm/creaturestats.cpp b/components/esm/creaturestats.cpp
index 6f0b36f8d..4ffe567c6 100644
--- a/components/esm/creaturestats.cpp
+++ b/components/esm/creaturestats.cpp
@@ -115,9 +115,11 @@ void ESM::CreatureStats::load (ESMReader &esm)
         int magicEffect;
         esm.getHT(magicEffect);
         std::string source = esm.getHNOString("SOUR");
+        int effectIndex = -1;
+        esm.getHNOT (effectIndex, "EIND");
         int actorId;
         esm.getHNT (actorId, "ACID");
-        mSummonedCreatureMap[std::make_pair(magicEffect, source)] = actorId;
+        mSummonedCreatureMap[std::make_tuple(magicEffect, source, effectIndex)] = actorId;
     }
 
     while (esm.isNextSub("GRAV"))
@@ -212,10 +214,13 @@ void ESM::CreatureStats::save (ESMWriter &esm) const
     mAiSequence.save(esm);
     mMagicEffects.save(esm);
 
-    for (std::map<std::pair<int, std::string>, int>::const_iterator it = mSummonedCreatureMap.begin(); it != mSummonedCreatureMap.end(); ++it)
+    for (std::map<std::tuple<int, std::string, int>, int>::const_iterator it = mSummonedCreatureMap.begin(); it != mSummonedCreatureMap.end(); ++it)
     {
-        esm.writeHNT ("SUMM", it->first.first);
-        esm.writeHNString ("SOUR", it->first.second);
+        esm.writeHNT ("SUMM", std::get<0>(it->first));
+        esm.writeHNString ("SOUR", std::get<1>(it->first));
+        int effectIndex = std::get<2>(it->first);
+        if (effectIndex != -1)
+            esm.writeHNT ("EIND", effectIndex);
         esm.writeHNT ("ACID", it->second);
     }
 
diff --git a/components/esm/creaturestats.hpp b/components/esm/creaturestats.hpp
index 79a576587..e79d430ce 100644
--- a/components/esm/creaturestats.hpp
+++ b/components/esm/creaturestats.hpp
@@ -39,7 +39,7 @@ namespace ESM
         bool mHasAiSettings;
         StatState<int> mAiSettings[4];
 
-        std::map<std::pair<int, std::string>, int> mSummonedCreatureMap;
+        std::map<std::tuple<int, std::string, int>, int> mSummonedCreatureMap;
         std::vector<int> mSummonGraveyard;
 
         ESM::TimeStamp mTradeTime;
diff --git a/components/esm/savedgame.cpp b/components/esm/savedgame.cpp
index 4b0529703..0fc84e309 100644
--- a/components/esm/savedgame.cpp
+++ b/components/esm/savedgame.cpp
@@ -4,7 +4,7 @@
 #include "esmwriter.hpp"
 
 unsigned int ESM::SavedGame::sRecordId = ESM::REC_SAVE;
-int ESM::SavedGame::sCurrentFormat = 13;
+int ESM::SavedGame::sCurrentFormat = 14;
 
 void ESM::SavedGame::load (ESMReader &esm)
 {