diff --git a/Source/GMCAbilitySystem/Private/Ability/GMCAbility.cpp b/Source/GMCAbilitySystem/Private/Ability/GMCAbility.cpp
index 0abfa7c0..f585313a 100644
--- a/Source/GMCAbilitySystem/Private/Ability/GMCAbility.cpp
+++ b/Source/GMCAbilitySystem/Private/Ability/GMCAbility.cpp
@@ -399,3 +399,14 @@ void UGMCAbility::ModifyBlockOtherAbilitiesViaDefinitionQuery(const FGameplayTag
 	BlockOtherAbilitiesQuery = NewQuery;
 	UE_LOG(LogGMCAbilitySystem, Verbose, TEXT("BlockOtherAbilityByDefinitionQuery modified: %s"), *NewQuery.GetDescription());
 }
+
+void UGMCAbility::ModifyAbilityDefinition(FGameplayTagContainer TagToAdd, FGameplayTagContainer TagToRemove)
+{
+	for (auto Tag : TagToAdd) {
+		AbilityDefinition.AddTag(Tag);
+	}
+
+	for (auto Tag : TagToRemove) {
+		AbilityDefinition.RemoveTag(Tag);
+	}
+}
diff --git a/Source/GMCAbilitySystem/Private/Effects/GMCAbilityEffect.cpp b/Source/GMCAbilitySystem/Private/Effects/GMCAbilityEffect.cpp
index d9165783..59acf681 100644
--- a/Source/GMCAbilitySystem/Private/Effects/GMCAbilityEffect.cpp
+++ b/Source/GMCAbilitySystem/Private/Effects/GMCAbilityEffect.cpp
@@ -407,3 +407,14 @@ void UGMCAbilityEffect::ModifyEndAbilitiesOnEndQuery(const FGameplayTagQuery& Ne
 	EffectData.EndAbilityOnEndQuery = NewQuery;
 	UE_LOG(LogGMCAbilitySystem, Verbose, TEXT("EndAbilityOnEndViaDefinitionQuery modified: %s"), *NewQuery.GetDescription());
 }
+
+void UGMCAbilityEffect::ModifyEffectDefinition(FGameplayTagContainer TagToAdd, FGameplayTagContainer TagToRemove)
+{
+	for (auto Tag : TagToAdd) {
+		EffectData.EffectDefinition.AddTag(Tag);
+	}
+
+	for (auto Tag : TagToRemove) {
+		EffectData.EffectDefinition.RemoveTag(Tag);
+	}
+}
diff --git a/Source/GMCAbilitySystem/Public/Ability/GMCAbility.h b/Source/GMCAbilitySystem/Public/Ability/GMCAbility.h
index a0b1cb03..784d5ead 100644
--- a/Source/GMCAbilitySystem/Public/Ability/GMCAbility.h
+++ b/Source/GMCAbilitySystem/Public/Ability/GMCAbility.h
@@ -281,5 +281,8 @@ class GMCABILITYSYSTEM_API UGMCAbility : public UObject, public IGameplayTaskOwn
 	UFUNCTION(BlueprintCallable, Category = "GMAS|Abilities|Queries")
 	void ModifyBlockOtherAbilitiesViaDefinitionQuery(const FGameplayTagQuery& NewQuery);
 
+	UFUNCTION(BlueprintCallable, Category = "GMAS|Abilities")
+	void ModifyAbilityDefinition(FGameplayTagContainer TagToAdd, FGameplayTagContainer TagToRemove);
+
 };
 
diff --git a/Source/GMCAbilitySystem/Public/Effects/GMCAbilityEffect.h b/Source/GMCAbilitySystem/Public/Effects/GMCAbilityEffect.h
index 374e338b..48c68fff 100644
--- a/Source/GMCAbilitySystem/Public/Effects/GMCAbilityEffect.h
+++ b/Source/GMCAbilitySystem/Public/Effects/GMCAbilityEffect.h
@@ -312,5 +312,9 @@ class GMCABILITYSYSTEM_API UGMCAbilityEffect : public UObject
 
 	UFUNCTION(BlueprintCallable, Category = "GMCAbilitySystem|Effects|Queries")
 	void ModifyEndAbilitiesOnEndQuery(const FGameplayTagQuery& NewQuery);
+	
+	UFUNCTION(BlueprintCallable, Category = "GMAS|Effects")
+	void ModifyEffectDefinition(FGameplayTagContainer TagToAdd, FGameplayTagContainer TagToRemove);
+
 };