diff --git a/config/defaultMods.json b/config/defaultMods.json
index b9e5522c6..28b1d23e3 100644
--- a/config/defaultMods.json
+++ b/config/defaultMods.json
@@ -45,6 +45,13 @@
 		"COMMANDERS": false,
 		"MITHRIL": false //so far unused
 	},
+	"baseBonuses" : [
+		{
+			"type" : "SPELL_DAMAGE", //Default spell damage
+			"val" : 100,
+			"valueType" : "BASE_NUMBER"
+		}
+	],
 	"heroBaseBonuses":
 	[
 		{
diff --git a/config/heroes/dungeon.json b/config/heroes/dungeon.json
index 5da9ce5db..d5750fb23 100644
--- a/config/heroes/dungeon.json
+++ b/config/heroes/dungeon.json
@@ -183,11 +183,11 @@
 		"specialty" : {
 			"bonuses" : {
 				"sorcery" : {
-					"subtype" : "skill.sorcery",
-					"type" : "SECONDARY_SKILL_PREMY",
+					"targetSourceType" : "SECONDARY_SKILL",
+					"type" : "SPELL_DAMAGE",
 					"updater" : "TIMES_HERO_LEVEL",
 					"val" : 5,
-					"valueType" : "PERCENT_TO_BASE"
+					"valueType" : "PERCENT_TO_TARGET_TYPE"
 				}
 			}
 		}
diff --git a/config/heroes/fortress.json b/config/heroes/fortress.json
index 86975e440..7d1915d57 100644
--- a/config/heroes/fortress.json
+++ b/config/heroes/fortress.json
@@ -258,11 +258,11 @@
 		"specialty" : {
 			"bonuses" : {
 				"sorcery" : {
-					"subtype" : "skill.sorcery",
-					"type" : "SECONDARY_SKILL_PREMY",
+					"targetSourceType" : "SECONDARY_SKILL",
+					"type" : "SPELL_DAMAGE",
 					"updater" : "TIMES_HERO_LEVEL",
 					"val" : 5,
-					"valueType" : "PERCENT_TO_BASE"
+					"valueType" : "PERCENT_TO_TARGET_TYPE"
 				}
 			}
 		}
diff --git a/config/heroes/inferno.json b/config/heroes/inferno.json
index 611e66871..14964f6ea 100644
--- a/config/heroes/inferno.json
+++ b/config/heroes/inferno.json
@@ -259,11 +259,11 @@
 		"specialty" : {
 			"bonuses" : {
 				"sorcery" : {
-					"subtype" : "skill.sorcery",
-					"type" : "SECONDARY_SKILL_PREMY",
+					"targetSourceType" : "SECONDARY_SKILL",
+					"type" : "SPELL_DAMAGE",
 					"updater" : "TIMES_HERO_LEVEL",
 					"val" : 5,
-					"valueType" : "PERCENT_TO_BASE"
+					"valueType" : "PERCENT_TO_TARGET_TYPE"
 				}
 			}
 		}
diff --git a/config/heroes/necropolis.json b/config/heroes/necropolis.json
index c68dc19a6..1a3e643e3 100644
--- a/config/heroes/necropolis.json
+++ b/config/heroes/necropolis.json
@@ -190,11 +190,11 @@
 		"specialty" : {
 			"bonuses" : {
 				"sorcery" : {
-					"subtype" : "skill.sorcery",
-					"type" : "SECONDARY_SKILL_PREMY",
+					"targetSourceType" : "SECONDARY_SKILL",
+					"type" : "SPELL_DAMAGE",
 					"updater" : "TIMES_HERO_LEVEL",
 					"val" : 5,
-					"valueType" : "PERCENT_TO_BASE"
+					"valueType" : "PERCENT_TO_TARGET_TYPE"
 				}
 			}
 		}
diff --git a/config/heroes/stronghold.json b/config/heroes/stronghold.json
index 956739f17..57a140089 100644
--- a/config/heroes/stronghold.json
+++ b/config/heroes/stronghold.json
@@ -133,11 +133,11 @@
 		"specialty" : {
 			"bonuses" : {
 				"sorcery" : {
-					"subtype" : "skill.sorcery",
-					"type" : "SECONDARY_SKILL_PREMY",
+					"targetSourceType" : "SECONDARY_SKILL",
+					"type" : "SPELL_DAMAGE",
 					"updater" : "TIMES_HERO_LEVEL",
 					"val" : 5,
-					"valueType" : "PERCENT_TO_BASE"
+					"valueType" : "PERCENT_TO_TARGET_TYPE"
 				}
 			}
 		}
@@ -236,11 +236,11 @@
 		"specialty" : {
 			"bonuses" : {
 				"sorcery" : {
-					"subtype" : "skill.sorcery",
-					"type" : "SECONDARY_SKILL_PREMY",
+					"targetSourceType" : "SECONDARY_SKILL",
+					"type" : "SPELL_DAMAGE",
 					"updater" : "TIMES_HERO_LEVEL",
 					"val" : 5,
-					"valueType" : "PERCENT_TO_BASE"
+					"valueType" : "PERCENT_TO_TARGET_TYPE"
 				}
 			}
 		}
diff --git a/config/skills.json b/config/skills.json
index b3cd53714..d606fe7aa 100644
--- a/config/skills.json
+++ b/config/skills.json
@@ -730,8 +730,7 @@
 		"base" : {
 			"effects" : {
 				"main" : {
-					"subtype" : "skill.sorcery",
-					"type" : "SECONDARY_SKILL_PREMY",
+					"type" : "SPELL_DAMAGE",
 					"valueType" : "BASE_NUMBER"
 				}
 			}
diff --git a/lib/HeroBonus.h b/lib/HeroBonus.h
index bda3c76a9..9784761ff 100644
--- a/lib/HeroBonus.h
+++ b/lib/HeroBonus.h
@@ -285,7 +285,7 @@ public:
 	BONUS_NAME(DARKNESS) /*val = radius */ \
 	BONUS_NAME(SPECIAL_SECONDARY_SKILL) /*subtype = id, val = value per level in percent*/ \
 	BONUS_NAME(SPECIAL_SPELL_LEV) /*subtype = id, val = value per level in percent*/\
-	BONUS_NAME(SPELL_DAMAGE) /*val = value*/\
+	BONUS_NAME(SPELL_DAMAGE) /*val = value, now works for sorcery*/\
 	BONUS_NAME(SPECIFIC_SPELL_DAMAGE) /*subtype = id of spell, val = value*/\
 	BONUS_NAME(SPECIAL_PECULIAR_ENCHANT) /*blesses and curses with id = val dependent on unit's level, subtype = 0 or 1 for Coronius*/\
 	BONUS_NAME(SPECIAL_UPGRADE) /*subtype = base, additionalInfo = target */\
diff --git a/lib/mapObjects/CGHeroInstance.cpp b/lib/mapObjects/CGHeroInstance.cpp
index 5fc12ab9a..71180a8d0 100644
--- a/lib/mapObjects/CGHeroInstance.cpp
+++ b/lib/mapObjects/CGHeroInstance.cpp
@@ -618,8 +618,8 @@ int64_t CGHeroInstance::getSpellBonus(const spells::Spell * spell, int64_t base,
 {
 	//applying sorcery secondary skill
 
-	base = static_cast<int64_t>(base * (100 + valOfBonuses(Bonus::SECONDARY_SKILL_PREMY, SecondarySkill::SORCERY)) / 100.0);
-	base = static_cast<int64_t>(base * (100 + valOfBonuses(Bonus::SPELL_DAMAGE) + valOfBonuses(Bonus::SPECIFIC_SPELL_DAMAGE, spell->getIndex())) / 100.0);
+	base = static_cast<int64_t>(base * (valOfBonuses(Bonus::SPELL_DAMAGE)) / 100.0);
+	base = static_cast<int64_t>(base * (100 + valOfBonuses(Bonus::SPECIFIC_SPELL_DAMAGE, spell->getIndex())) / 100.0);
 
 	int maxSchoolBonus = 0;