diff --git a/include/vcmi/EntityService.h b/include/vcmi/EntityService.h
index 96c90ca5d..58f49647c 100644
--- a/include/vcmi/EntityService.h
+++ b/include/vcmi/EntityService.h
@@ -29,6 +29,7 @@ class DLL_LINKAGE EntityServiceT : public EntityService
 public:
 	virtual const EntityType * getById(const IdType & id) const = 0;
 	virtual const EntityType * getByIndex(const int32_t index) const = 0;
+	virtual const EntityType * getByName(const std::string & name) const = 0;
 
 	virtual void forEach(const std::function<void(const EntityType * entity, bool & stop)> & cb) const = 0;
 };
diff --git a/include/vcmi/scripting/Service.h b/include/vcmi/scripting/Service.h
index 5670f4c23..5b5901fe8 100644
--- a/include/vcmi/scripting/Service.h
+++ b/include/vcmi/scripting/Service.h
@@ -33,7 +33,6 @@ public:
 	virtual void run(ServerCallback * server, const JsonNode & initialState) = 0;
 
 	virtual JsonNode callGlobal(const std::string & name, const JsonNode & parameters) = 0;
-	virtual JsonNode callGlobal(ServerCallback * server, const std::string & name, const JsonNode & parameters) = 0;
 
 	virtual void setGlobal(const std::string & name, int value) = 0;
 	virtual void setGlobal(const std::string & name, const std::string & value) = 0;
diff --git a/lib/IHandlerBase.cpp b/lib/IHandlerBase.cpp
index 618f09087..2bb207e36 100644
--- a/lib/IHandlerBase.cpp
+++ b/lib/IHandlerBase.cpp
@@ -41,4 +41,9 @@ void IHandlerBase::registerObject(const std::string & scope, const std::string &
 	}
 }
 
+std::optional<int32_t> IHandlerBase::resolveIdentifier(const std::string & scope, const std::string & typeName, const std::string & name) const
+{
+	return LIBRARY->identifiersHandler->getIdentifier(scope, typeName, name);
+}
+
 VCMI_LIB_NAMESPACE_END
diff --git a/lib/IHandlerBase.h b/lib/IHandlerBase.h
index ae93e1b03..21c7cd972 100644
--- a/lib/IHandlerBase.h
+++ b/lib/IHandlerBase.h
@@ -24,6 +24,7 @@ protected:
 	void registerObject(const std::string & scope, const std::string & typeName, const std::string & name, const JsonNode & data, si32 index);
 	void registerObject(const std::string & scope, const std::vector<std::string> & typeNames, const std::string & name, const JsonNode & data, si32 index);
 
+	std::optional<int32_t> resolveIdentifier(const std::string & scope, const std::string & typeName, const std::string & name) const;
 public:
 	/// loads all original game data in vector of json nodes
 	/// dataSize - is number of items that must be loaded (normally - constant from GameConstants)
@@ -79,6 +80,16 @@ public:
 		return getObjectImpl(index);
 	}
 
+	const _ObjectBase * getByName(const std::string & name) const override
+	{
+		// TODO: provide actual scope? Perhaps pass it as json node?
+		auto index = resolveIdentifier(getScopeBuiltin(), getTypeNames().front(), name);
+		if (index)
+			return getByIndex(*index);
+		else
+			return nullptr;
+	}
+
 	void forEachBase(const std::function<void(const Entity * entity, bool & stop)> & cb) const override
 	{
 		forEachT(cb);
diff --git a/luascript/LuaContext.cpp b/luascript/LuaContext.cpp
index c968d031d..85c710f6e 100644
--- a/luascript/LuaContext.cpp
+++ b/luascript/LuaContext.cpp
@@ -217,20 +217,6 @@ JsonNode LuaContext::callGlobal(const std::string & name, const JsonNode & param
 	return ret;
 }
 
-JsonNode LuaContext::callGlobal(ServerCallback * cb, const std::string & name, const JsonNode & parameters)
-{
-	LuaStack S(L);
-	S.push(cb);
-	lua_setglobal(L, "SERVER");
-
-	auto ret = callGlobal(name, parameters);
-
-	S.pushNil();
-	lua_setglobal(L, "SERVER");
-
-	return ret;
-}
-
 void LuaContext::getGlobal(const std::string & name, int & value)
 {
 	LuaStack S(L);
diff --git a/luascript/LuaContext.h b/luascript/LuaContext.h
index fac8a1c25..2d2a844bd 100644
--- a/luascript/LuaContext.h
+++ b/luascript/LuaContext.h
@@ -36,7 +36,6 @@ public:
 	int errorRetVoid(const std::string & message);
 
 	JsonNode callGlobal(const std::string & name, const JsonNode & parameters) override;
-	JsonNode callGlobal(ServerCallback * cb, const std::string & name, const JsonNode & parameters) override;
 
 	template<typename... Args>
 	JsonNode callGlobalWithParameters(const std::string & name, Args&& ... parameters);
diff --git a/scripts/SpellEffectSummon.lua b/scripts/SpellEffectSummon.lua
index ffe6352c3..8964a1d38 100644
--- a/scripts/SpellEffectSummon.lua
+++ b/scripts/SpellEffectSummon.lua
@@ -20,25 +20,28 @@ end
 local function summonedCreatureHealth(parameters, mechanics)
 	local valueWithBonus = summonedEffectValue(parameters, mechanics)
 
+	local creature = SERVICES.creatures.getByName(parameters.creature)
 	if parameters.summonByHealth then
 		return valueWithBonus
 	else
-		return valueWithBonus * parameters.creature:getMaxHealth()
+		return valueWithBonus * creature:getMaxHealth()
 	end
 end
 
 local function summonedCreatureAmount(parameters, mechanics)
 	local valueWithBonus = summonedEffectValue(parameters, mechanics)
 
+	local creature = SERVICES.creatures.getByName(parameters.creature)
 	if parameters.summonByHealth then
-		return math.floor(valueWithBonus / parameters.creature:getMaxHealth())
+		return math.floor(valueWithBonus / creature:getMaxHealth())
 	else
 		return valueWithBonus
 	end
 end
 
 applicable = function(parameters, mechanics, problem)
-	if parameters.creature == "nil" then
+	local creature = SERVICES.creatures.getByName(parameters.creature)
+	if creature == "nil" then
 		return false -- mechanics:adaptGenericProblem(problem)
 	end
 
@@ -83,8 +86,7 @@ applicable = function(parameters, mechanics, problem)
 end
 
 apply = function(parameters, mechanics, server, target)
-	local pack = BattleUnitsChanged.new()
-	pack.battleID = mechanics:getBattleID()
+	local creature = SERVICES.creatures.getByName(parameters.creature)
 
 	for _, dest in ipairs(target) do
 		if dest.unitValue then
@@ -99,6 +101,7 @@ apply = function(parameters, mechanics, server, target)
 			)
 			
 			server:battleUnitChanged(
+				mechanics:getBattleID(),
 				summoned:unitId(),
 				UnitChanges.EOperation.UPDATE,
 				state:save()
@@ -106,6 +109,7 @@ apply = function(parameters, mechanics, server, target)
 			
 		else
 			server:battleUnitChanged(
+				mechanics:getBattleID(),
 				mechanics:getBattle():getNextUnitId(),
 				UnitChanges.EOperation.ADD,
 				{
@@ -125,6 +129,7 @@ apply = function(parameters, mechanics, server, target)
 end
 
 transformTarget = function(parameters, mechanics, aimPoint, spellTarget)
+	local creature = SERVICES.creatures.getByName(parameters.creature)
 	local sameSummoned = mechanics:getBattle():getAnyUnitIf(function(unit)
 		return (unit:getOwner() == mechanics:getCasterColor())
 			and (unit:isSummoned())