diff --git a/Source/missiles.cpp b/Source/missiles.cpp
index 0728fd7b4..4159e634a 100644
--- a/Source/missiles.cpp
+++ b/Source/missiles.cpp
@@ -1474,7 +1474,7 @@ void InitMissiles()
 		}
 	}
 #ifdef HELLFIRE
-	plr[myplr].wReflection = FALSE;
+	plr[myplr].wReflections = 0;
 #endif
 }
 
@@ -1616,7 +1616,7 @@ void missiles_reflection(int mi, int sx, int sy, int dx, int dy, int midir, char
 			lvl = missile[mi]._mispllvl;
 		else
 			lvl = 2;
-		plr[id].wReflection += lvl * plr[id]._pLevel;
+		plr[id].wReflections += lvl * plr[id]._pLevel;
 		UseMana(id, SPL_REFLECT);
 	}
 	missile[mi]._mirange = 0;
@@ -4448,7 +4448,7 @@ void mi_reflect(int i)
 	}
 	if (src != myplr && currlevel != plr[src].plrlevel)
 		missile[i]._miDelFlag = TRUE;
-	if ((WORD)plr[src].wReflection <= 0) {
+	if (plr[src].wReflections <= 0) {
 		missile[i]._miDelFlag = TRUE;
 		NetSendCmd(TRUE, CMD_REFLECT);
 	}
diff --git a/Source/monster.cpp b/Source/monster.cpp
index 7a3fb1289..fc415da7d 100644
--- a/Source/monster.cpp
+++ b/Source/monster.cpp
@@ -2556,12 +2556,20 @@ void M_TryH2HHit(int i, int pnum, int Hit, int MinDam, int MaxDam)
 	int blk, blkper;
 	int dam, mdam;
 	int newx, newy;
-	int j, misnum, ms_num, cur_ms_num, new_hp;
+	int j, misnum, ms_num, cur_ms_num, new_hp, dir, ac;
 
 	if ((DWORD)i >= MAXMONSTERS)
+#ifdef HELLFIRE
+		return;
+#else
 		app_fatal("M_TryH2HHit: Invalid monster %d", i);
+#endif
 	if (monster[i].MType == NULL)
+#ifdef HELLFIRE
+		return;
+#else
 		app_fatal("M_TryH2HHit: Monster %d \"%s\" MType NULL", i, monster[i].mName);
+#endif
 	if (monster[i]._mFlags & MFLAG_TARGETS_MONSTER) {
 		M_TryM2MHit(i, pnum, Hit, MinDam, MaxDam);
 		return;
@@ -2577,12 +2585,18 @@ void M_TryH2HHit(int i, int pnum, int Hit, int MinDam, int MaxDam)
 #ifdef _DEBUG
 	if (debug_mode_dollar_sign || debug_mode_key_inverted_v)
 		hper = 1000;
+#endif
+	ac = plr[pnum]._pIBonusAC + plr[pnum]._pIAC;
+#ifdef HELLFIRE
+	if (plr[pnum].pDamAcFlags & 0x20 && monster[i].MData->mMonstClass == MC_DEMON)
+		ac += 40;
+	if (plr[pnum].pDamAcFlags & 0x40 && monster[i].MData->mMonstClass == MC_UNDEAD)
+		ac += 20;
 #endif
 	hit = Hit
 	    + 2 * (monster[i].mLevel - plr[pnum]._pLevel)
 	    + 30
-	    - plr[pnum]._pIBonusAC
-	    - plr[pnum]._pIAC
+	    - ac
 	    - plr[pnum]._pDexterity / 5;
 	if (hit < 15)
 		hit = 15;
@@ -2608,7 +2622,26 @@ void M_TryH2HHit(int i, int pnum, int Hit, int MinDam, int MaxDam)
 	if (hper >= hit)
 		return;
 	if (blkper < blk) {
-		StartPlrBlock(pnum, GetDirection(plr[pnum]._px, plr[pnum]._py, monster[i]._mx, monster[i]._my));
+		dir = GetDirection(plr[pnum]._px, plr[pnum]._py, monster[i]._mx, monster[i]._my);
+		StartPlrBlock(pnum, dir);
+#ifdef HELLFIRE
+		if (pnum == myplr && plr[pnum].wReflections > 0) {
+			plr[pnum].wReflections--;
+			dam = random_(99, (MaxDam - MinDam + 1) << 6) + (MinDam << 6);
+			dam += plr[pnum]._pIGetHit << 6;
+			if (dam < 64)
+				dam = 64;
+			mdam = dam * (0.01 * (random_(100, 10) + 20));
+			monster[i]._mhitpoints -= mdam;
+			dam -= mdam;
+			if (dam < 0)
+				dam = 0;
+			if (monster[i]._mhitpoints >> 6 <= 0)
+				M_StartKill(i, pnum);
+			else
+				M_StartHit(i, pnum, mdam);
+		}
+#endif
 		return;
 	}
 	if (monster[i].MType->mtype == MT_YZOMBIE && pnum == myplr) {
@@ -2624,20 +2657,21 @@ void M_TryH2HHit(int i, int pnum, int Hit, int MinDam, int MaxDam)
 				ms_num = misnum;
 		}
 		if (plr[pnum]._pMaxHP > 64) {
-			if (plr[pnum]._pMaxHPBase > 64) {
-				new_hp = plr[pnum]._pMaxHP - 64;
-				plr[pnum]._pMaxHP = new_hp;
-				if (plr[pnum]._pHitPoints > new_hp) {
-					plr[pnum]._pHitPoints = new_hp;
+#ifndef HELLFIRE
+			if (plr[pnum]._pMaxHPBase > 64)
+#endif
+			{
+				plr[pnum]._pMaxHP -= 64;
+				if (plr[pnum]._pHitPoints > plr[pnum]._pMaxHP) {
+					plr[pnum]._pHitPoints = plr[pnum]._pMaxHP;
 					if (cur_ms_num >= 0)
-						missile[cur_ms_num]._miVar1 = new_hp;
+						missile[cur_ms_num]._miVar1 = plr[pnum]._pHitPoints;
 				}
-				new_hp = plr[pnum]._pMaxHPBase - 64;
-				plr[pnum]._pMaxHPBase = new_hp;
-				if (plr[pnum]._pHPBase > new_hp) {
-					plr[pnum]._pHPBase = new_hp;
+				plr[pnum]._pMaxHPBase -= 64;
+				if (plr[pnum]._pHPBase > plr[pnum]._pMaxHPBase) {
+					plr[pnum]._pHPBase = plr[pnum]._pMaxHPBase;
 					if (cur_ms_num >= 0)
-						missile[cur_ms_num]._miVar2 = new_hp;
+						missile[cur_ms_num]._miVar2 = plr[pnum]._pHPBase;
 				}
 			}
 		}
@@ -2647,6 +2681,20 @@ void M_TryH2HHit(int i, int pnum, int Hit, int MinDam, int MaxDam)
 	if (dam < 64)
 		dam = 64;
 	if (pnum == myplr) {
+#ifdef HELLFIRE
+		if (plr[pnum].wReflections > 0) {
+			plr[pnum].wReflections--;
+			mdam = dam * (0.01 * (random_(100, 10) + 20));
+			monster[i]._mhitpoints -= mdam;
+			dam -= mdam;
+			if (dam < 0)
+				dam = 0;
+			if (monster[i]._mhitpoints >> 6 <= 0)
+				M_StartKill(i, pnum);
+			else
+				M_StartHit(i, pnum, mdam);
+		}
+#endif
 		plr[pnum]._pHitPoints -= dam;
 		plr[pnum]._pHPBase -= dam;
 	}
@@ -2666,6 +2714,9 @@ void M_TryH2HHit(int i, int pnum, int Hit, int MinDam, int MaxDam)
 	}
 	if (plr[pnum]._pHitPoints >> 6 <= 0) {
 		SyncPlrKill(pnum, 0);
+#ifdef HELLFIRE
+		M_StartStand(i, monster[i]._mdir);
+#endif
 		return;
 	}
 	StartPlrHit(pnum, dam, FALSE);
diff --git a/Source/pack.cpp b/Source/pack.cpp
index 422a1d10d..65096ac34 100644
--- a/Source/pack.cpp
+++ b/Source/pack.cpp
@@ -78,7 +78,7 @@ void PackPlayer(PkPlayerStruct *pPack, int pnum, BOOL manashield)
 	pPack->pMemSpells = pPlayer->_pMemSpells;
 
 #ifdef HELLFIRE
-	for (i = 0; i <= 36; i++) // Should be MAX_SPELLS-1 but set to 36 to make save games compatible	
+	for (i = 0; i <= 36; i++) // Should be MAX_SPELLS-1 but set to 36 to make save games compatible
 		pPack->pSplLvl[i] = pPlayer->_pSplLvl[i];
 	char *p = pPack->pSplLvl2;
 	for (i = 37; i < 47; i++)
@@ -120,7 +120,7 @@ void PackPlayer(PkPlayerStruct *pPack, int pnum, BOOL manashield)
 	}
 
 #ifdef HELLFIRE
-	pPack->wReflection = pPlayer->wReflection;
+	pPack->wReflections = pPlayer->wReflections;
 	pPack->pDiabloKillLevel = pPlayer->pDiabloKillLevel;
 	pPack->pDifficulty = pPlayer->pDifficulty;
 	pPack->pDamAcFlags = pPlayer->pDamAcFlags;
@@ -288,7 +288,7 @@ void UnPackPlayer(PkPlayerStruct *pPack, int pnum, BOOL killok)
 
 	CalcPlrInv(pnum, FALSE);
 #ifdef HELLFIRE
-	pPlayer->wReflection = pPack->wReflection;
+	pPlayer->wReflections = pPack->wReflections;
 #endif
 	pPlayer->pTownWarps = 0;
 	pPlayer->pDungMsgs = 0;
diff --git a/Source/player.cpp b/Source/player.cpp
index 91b2e3f6f..2d6ab6bcd 100644
--- a/Source/player.cpp
+++ b/Source/player.cpp
@@ -704,7 +704,7 @@ void ClearPlrRVars(PlayerStruct *p)
 	p->bReserved[2] = 0;
 
 #ifndef HELLFIRE
-	p->wReflection = 0;
+	p->wReflections = 0;
 #endif
 	p->wReserved[0] = 0;
 	p->wReserved[1] = 0;
@@ -934,7 +934,7 @@ void CreatePlayer(int pnum, char c)
 	plr[pnum].pManaShield = FALSE;
 #else
 	plr[pnum].pDamAcFlags = 0;
-	plr[pnum].wReflection = 0;
+	plr[pnum].wReflections = 0;
 #endif
 
 	InitDungMsgs(pnum);
diff --git a/structs.h b/structs.h
index 30dd4ea5a..a12303d1d 100644
--- a/structs.h
+++ b/structs.h
@@ -348,7 +348,7 @@ typedef struct PlayerStruct {
 #endif
 	BOOLEAN pManaShield;
 	char bReserved[3];
-	short wReflection;
+	WORD wReflections;
 	short wReserved[7];
 	DWORD pDiabloKillLevel;
 	int pDifficulty;
@@ -1500,7 +1500,7 @@ typedef struct PkPlayerStruct {
 #endif
 	BOOLEAN pManaShield;
 	char bReserved[3];
-	short wReflection;
+	WORD wReflections;
 	short wReserved2;
 	char pSplLvl2[10]; // Hellfire spells
 	short wReserved8;