diff --git a/config/schemas/spell.json b/config/schemas/spell.json
index 45010a75f..7d0084f38 100644
--- a/config/schemas/spell.json
+++ b/config/schemas/spell.json
@@ -231,20 +231,25 @@
 			 "additionalProperties" : false,
 			 "required" : ["none", "basic", "advanced", "expert"],
 
-			 "properties":{
-				 "none":{
-					  "$ref" : "#/definitions/levelInfo"
-				 },
-				 "basic":{
-					  "$ref" : "#/definitions/levelInfo"
-				 },
-				 "advanced":{
-					  "$ref" : "#/definitions/levelInfo"
-				 },
-				 "expert":{
-					  "$ref" : "#/definitions/levelInfo"
-				 }
-			 }
+			 "properties":{	
+				"base":{
+					"type": "object",
+					"description": "will be merged with all levels",
+					"additionalProperties": true
+				},
+				"none":{
+					"$ref" : "#/definitions/levelInfo"
+				},
+				"basic":{
+					"$ref" : "#/definitions/levelInfo"
+				},
+				"advanced":{
+					"$ref" : "#/definitions/levelInfo"
+				},
+				"expert":{
+					"$ref" : "#/definitions/levelInfo"
+				}
+			}
 		}
 	}
 }
diff --git a/lib/CModHandler.cpp b/lib/CModHandler.cpp
index 94eb2cb1a..9b7701dee 100644
--- a/lib/CModHandler.cpp
+++ b/lib/CModHandler.cpp
@@ -296,6 +296,12 @@ bool CContentHandler::ContentTypeHandler::loadMod(std::string modName, bool vali
 {
 	ModInfo & modInfo = modData[modName];
 	bool result = true;
+	
+	auto performValidate = [&,this](JsonNode & data, const std::string & name){
+		handler->beforeValidate(data);
+		if (validate)
+			result &= JsonUtils::validate(data, "vcmi:" + objectName, name);	
+	};
 
 	// apply patches
 	if (!modInfo.patches.isNull())
@@ -314,8 +320,8 @@ bool CContentHandler::ContentTypeHandler::loadMod(std::string modName, bool vali
 			if (originalData.size() > index)
 			{
 				JsonUtils::merge(originalData[index], data);
-				if (validate)
-					result &= JsonUtils::validate(originalData[index], "vcmi:" + objectName, name);
+				
+				performValidate(originalData[index],name);
 				handler->loadObject(modName, name, originalData[index], index);
 
 				originalData[index].clear(); // do not use same data twice (same ID)
@@ -324,8 +330,7 @@ bool CContentHandler::ContentTypeHandler::loadMod(std::string modName, bool vali
 			}
 		}
 		// normal new object or one with index bigger that data size
-		if (validate)
-			result &= JsonUtils::validate(data, "vcmi:" + objectName, name);
+		performValidate(data,name);
 		handler->loadObject(modName, name, data);
 	}
 	return result;
diff --git a/lib/CSpellHandler.cpp b/lib/CSpellHandler.cpp
index 00d1dc2df..95493d7bd 100644
--- a/lib/CSpellHandler.cpp
+++ b/lib/CSpellHandler.cpp
@@ -864,6 +864,22 @@ void CSpellHandler::afterLoadFinalization()
 				bonus.sid = spell->id;
 }
 
+void CSpellHandler::beforeValidate(JsonNode & object)
+{
+	//handle "base" level info
+	
+	JsonNode levels = object["levels"];
+	
+	if(levels["base"].getType() == JsonNode::DATA_STRUCT)
+	{
+		JsonUtils::mergeCopy(levels["none"],levels["base"]);
+		JsonUtils::mergeCopy(levels["basic"],levels["base"]);
+		JsonUtils::mergeCopy(levels["advanced"],levels["base"]);
+		JsonUtils::mergeCopy(levels["expert"],levels["base"]);
+	}
+	
+	
+}
 
 
 CSpellHandler::~CSpellHandler()
diff --git a/lib/CSpellHandler.h b/lib/CSpellHandler.h
index 5c2797eb9..e516973b7 100644
--- a/lib/CSpellHandler.h
+++ b/lib/CSpellHandler.h
@@ -205,6 +205,7 @@ public:
 
 	std::vector<JsonNode> loadLegacyData(size_t dataSize) override;
 	void afterLoadFinalization() override;
+	void beforeValidate(JsonNode & object) override;
 
 	/**
 	 * Gets a list of default allowed spells. OH3 spells are all allowed by default.
diff --git a/lib/IHandlerBase.h b/lib/IHandlerBase.h
index 8c570e8ac..2ae74235e 100644
--- a/lib/IHandlerBase.h
+++ b/lib/IHandlerBase.h
@@ -32,6 +32,9 @@ public:
 	virtual void loadObject(std::string scope, std::string name, const JsonNode & data) = 0;
 	virtual void loadObject(std::string scope, std::string name, const JsonNode & data, size_t index) = 0;
 
+	/// allows handlers to alter object configuration before validation and actual load
+	virtual void beforeValidate(JsonNode & object){};
+
 	/// allows handler to do post-loading step for validation or integration of loaded data
 	virtual void afterLoadFinalization(){};