diff --git a/common/spdat.h b/common/spdat.h
index 32ed30ce2..0fe8bd3cd 100644
--- a/common/spdat.h
+++ b/common/spdat.h
@@ -861,7 +861,7 @@ typedef enum {
 //#define SE_Attack_Accuracy_Max_Percent	518 //
 //#define SE_Luck_Amount				519 //
 //#define SE_Luck_Percent				520 //
-//#define SE_Endurance_Absorb_Pct_Damage	521 //
+#define SE_Endurance_Absorb_Pct_Damage	521 //
 #define SE_Instant_Mana_Pct				522 //
 #define SE_Instant_Endurance_Pct		523 //
 #define SE_Duration_HP_Pct				524 //
diff --git a/zone/attack.cpp b/zone/attack.cpp
index d7450c341..8b0def2bc 100644
--- a/zone/attack.cpp
+++ b/zone/attack.cpp
@@ -3323,8 +3323,8 @@ int32 Mob::ReduceAllDamage(int32 damage)
 	if (damage <= 0)
 		return damage;
 
-	if (spellbonuses.ManaAbsorbPercentDamage[0]) {
-		int32 mana_reduced = damage * spellbonuses.ManaAbsorbPercentDamage[0] / 100;
+	if (spellbonuses.ManaAbsorbPercentDamage) {
+		int32 mana_reduced = damage * spellbonuses.ManaAbsorbPercentDamage / 100;
 		if (GetMana() >= mana_reduced) {
 			damage -= mana_reduced;
 			SetMana(GetMana() - mana_reduced);
@@ -3332,6 +3332,19 @@ int32 Mob::ReduceAllDamage(int32 damage)
 		}
 	}
 
+	if (spellbonuses.EnduranceAbsorbPercentDamage[0]) {
+		int32 damage_reduced = damage * spellbonuses.EnduranceAbsorbPercentDamage[0] / 10000;
+		int32 endurance_drain = damage_reduced * spellbonuses.EnduranceAbsorbPercentDamage[1] / 10000;
+		if (endurance_drain < 1)
+			endurance_drain = 1;
+
+		if (IsClient() && CastToClient()->GetEndurance() >= endurance_drain) {
+			damage -= damage_reduced;
+			CastToClient()->SetEndurance(CastToClient()->GetEndurance() - endurance_drain);
+			TryTriggerOnValueAmount(false, false, true);
+		}
+	}
+
 	CheckNumHitsRemaining(NumHit::IncomingDamage);
 
 	return(damage);
diff --git a/zone/bonuses.cpp b/zone/bonuses.cpp
index 0c25c5b92..2be2bd39c 100644
--- a/zone/bonuses.cpp
+++ b/zone/bonuses.cpp
@@ -2692,9 +2692,17 @@ void Mob::ApplySpellsBonuses(uint16 spell_id, uint8 casterlevel, StatBonuses *ne
 
 			case SE_ManaAbsorbPercentDamage:
 			{
-				if (new_bonus->ManaAbsorbPercentDamage[0] < effect_value){
-					new_bonus->ManaAbsorbPercentDamage[0] = effect_value;
-					new_bonus->ManaAbsorbPercentDamage[1] = buffslot;
+				if (new_bonus->ManaAbsorbPercentDamage < effect_value){
+					new_bonus->ManaAbsorbPercentDamage = effect_value;
+				}
+				break;
+			}
+
+			case SE_Endurance_Absorb_Pct_Damage:
+			{
+				if (new_bonus->EnduranceAbsorbPercentDamage[0] < effect_value) {
+					new_bonus->EnduranceAbsorbPercentDamage[0] = effect_value;
+					new_bonus->EnduranceAbsorbPercentDamage[1] = base2;
 				}
 				break;
 			}
@@ -4356,8 +4364,12 @@ void Mob::NegateSpellsBonuses(uint16 spell_id)
 					break;
 
 				case SE_ManaAbsorbPercentDamage:
-					spellbonuses.ManaAbsorbPercentDamage[0] = effect_value;
-					spellbonuses.ManaAbsorbPercentDamage[1] = -1;
+					spellbonuses.ManaAbsorbPercentDamage = effect_value;
+					break;
+
+				case SE_Endurance_Absorb_Pct_Damage:
+					spellbonuses.EnduranceAbsorbPercentDamage[0] = effect_value;
+					spellbonuses.EnduranceAbsorbPercentDamage[1] = effect_value;
 					break;
 
 				case SE_ShieldBlock:
diff --git a/zone/common.h b/zone/common.h
index fd513bdde..e1c6b1787 100644
--- a/zone/common.h
+++ b/zone/common.h
@@ -494,7 +494,8 @@ struct StatBonuses {
 	uint32	MitigateDotRune[4];					// 0 = Mitigation value 1 = Buff Slot 2 = Max mitigation per tick 3 = Rune Amt
 	bool	TriggerMeleeThreshold;				// Has Melee Threshhold
 	bool	TriggerSpellThreshold;				// Has Spell Threshhold
-	uint32	ManaAbsorbPercentDamage[2];			// 0 = Mitigation value 1 = Buff Slot
+	uint32	ManaAbsorbPercentDamage;			// 0 = Mitigation value 
+	int32	EnduranceAbsorbPercentDamage[2];	// 0 = Mitigation value 1 = Percent Endurance drain per HP lost 
 	int32	ShieldBlock;						// Chance to Shield Block
 	int32	BlockBehind;						// Chance to Block Behind (with our without shield)
 	bool	CriticalRegenDecay;					// increase critical regen chance, decays based on spell level cast
diff --git a/zone/lua_stat_bonuses.cpp b/zone/lua_stat_bonuses.cpp
index d311cf123..b6561199b 100644
--- a/zone/lua_stat_bonuses.cpp
+++ b/zone/lua_stat_bonuses.cpp
@@ -1162,7 +1162,7 @@ uint32 Lua_StatBonuses::GetMitigateDotRune(int idx) const {
 
 uint32 Lua_StatBonuses::GetManaAbsorbPercentDamage(int idx) const {
 	Lua_Safe_Call_Int();
-	return self->ManaAbsorbPercentDamage[idx];
+	return self->ManaAbsorbPercentDamage;
 }
 
 int32 Lua_StatBonuses::GetImprovedTaunt(int idx) const {