- added an old submission for PowerReflection, although it had to be seriously reworked and improved.

src/namedef.h

@@ -197,6 +197,8 @@ xx(PowerWeaponLevel2)
 xx(PowerFlight)
 xx(PowerSpeed)
 xx(PowerTorch)
+xx(PowerReflection)
+xx(Reflection)
 xx(CustomInventory)
 xx(Inventory)
 xx(CallTryPickup)

src/p_interaction.cpp

@@ -1162,6 +1162,28 @@ static int DamageMobj (AActor *target, AActor *inflictor, AActor *source, int da
 		// any negative value means that something in the above chain has cancelled out all damage and all damage effects, including pain.
 		return 0;
 	}
+
+
+	AInventory *reflect;
+	//[RC] Backported from the Zandronum source.. Mostly.
+	if( target->player  &&
+		damage > 0 &&
+		source &&
+		(reflect = target->FindInventory(NAME_PowerReflection)) &&
+		mod != NAME_Reflection)
+	{
+		if ( target != source )
+		{
+			// use the reflect item's damage factors to get the final value here.
+			int reflectdamage = reflect->ApplyDamageFactor(mod, damage);
+			P_DamageMobj(source, nullptr, target, reflectdamage, NAME_Reflection );
+
+			// Reset means of death flag.
+			MeansOfDeath = mod;
+		}
+	}
+
+
 	// Push the target unless the source's weapon's kickback is 0.
 	// (i.e. Gauntlets/Chainsaw)
 	if (!plrDontThrust && inflictor && inflictor != target	// [RH] Not if hurting own self

wadsrc/static/zscript/inventory/powerups.txt

@@ -1939,6 +1939,21 @@ class PowerInfiniteAmmo : Powerup
 	}
 }
 
+
+//===========================================================================
+//
+// InfiniteAmmo
+//
+//===========================================================================
+
+class PowerReflection : Powerup
+{
+	Default
+	{
+		Powerup.Duration -30;
+	}
+}
+
 //===========================================================================
 //
 // PowerMorph