diff --git a/src/Battling/Flow/TurnHandler.cpp b/src/Battling/Flow/TurnHandler.cpp
index 3b15828..348daef 100644
--- a/src/Battling/Flow/TurnHandler.cpp
+++ b/src/Battling/Flow/TurnHandler.cpp
@@ -148,7 +148,9 @@ void TurnHandler::HandleAttackForTarget(ExecutingAttack* attack, Creature* targe
 
         auto hitType = hit->GetType();
         HOOK(ChangeAttackType, targetSource, attack, target, hitIndex, &hitType);
-        hit->SetEffectiveness(library->GetTypeLibrary()->GetEffectiveness(hitType, target->GetTypes()));
+        auto effectiveness = library->GetTypeLibrary()->GetEffectiveness(hitType, target->GetTypes());
+        HOOK(ChangeEffectiveness, attack, attack, target, hitIndex, &effectiveness)
+        hit->SetEffectiveness(effectiveness);
         hit->SetCritical(library->GetMiscLibrary()->IsCritical(attack, target, hitIndex));
         hit->SetBasePower(dmgLibrary->GetBasePower(attack, target, hitIndex));
         hit->SetDamage(dmgLibrary->GetDamage(attack, target, hitIndex));
diff --git a/src/Battling/ScriptHandling/Script.hpp b/src/Battling/ScriptHandling/Script.hpp
index 3ba076c..c5d1f15 100644
--- a/src/Battling/ScriptHandling/Script.hpp
+++ b/src/Battling/ScriptHandling/Script.hpp
@@ -37,6 +37,8 @@ namespace CreatureLib::Battling {
         virtual void IsInvulnerable(ExecutingAttack* attack, Creature* target, bool* outResult){};
         virtual void OnAttackMiss(ExecutingAttack* attack, Creature* target){};
         virtual void ChangeAttackType(ExecutingAttack* attack, Creature* target, uint8_t hitNumber, uint8_t* outType){};
+        virtual void ChangeEffectiveness(ExecutingAttack* attack, Creature* target, uint8_t hitNumber,
+                                         float* effectiveness){};
 
         virtual void OverrideBasePower(ExecutingAttack* attack, Creature* target, uint8_t hitIndex,
                                        uint8_t* basePower){};