diff --git a/source/games/duke/src/actors_d.cpp b/source/games/duke/src/actors_d.cpp
index 912965d68..ef4e43f5b 100644
--- a/source/games/duke/src/actors_d.cpp
+++ b/source/games/duke/src/actors_d.cpp
@@ -991,69 +991,6 @@ void movetransports_d(void)
 //
 //---------------------------------------------------------------------------
 
-static void fireflyflyingeffect(DDukeActor *actor)
-{
-	double xx;
-	int p = findplayer(actor, &xx);
-	execute(actor, p, xx);
-	if (actor->ObjectFlags & OF_EuthanizeMe) return;	// killed by script.
-
-	auto Owner = actor->GetOwner();
-	if (!Owner || Owner->spr.picnum != DTILE_FIREFLY) 
-	{
-		actor->Destroy();
-		return;
-	}
-
-	if (Owner->spr.scale.X >= 0.375 || Owner->spr.pal == 1)
-		actor->spr.cstat |= CSTAT_SPRITE_INVISIBLE;
-	else
-		actor->spr.cstat &= ~CSTAT_SPRITE_INVISIBLE;
-
-	auto dvec = Owner->spr.pos.XY() - ps[p].GetActor()->spr.pos.XY();
-	double dist = dvec.Length();
-
-	if (dist != 0.0) dvec /= dist;
-	actor->spr.pos = Owner->spr.pos + DVector3(dvec.X * -0.625, dvec.Y * -0.625, 8);
-
-	if (Owner->spr.extra <= 0) 
-	{
-		actor->Destroy();
-	}
-
-}
-//---------------------------------------------------------------------------
-//
-// 
-//
-//---------------------------------------------------------------------------
-
-void moveexplosions_d(void)  // STATNUM 5
-{
-	DukeStatIterator it(STAT_MISC);
-	while (auto act = it.Next())
-	{
-		if (act->spr.scale.X == 0 || act->spr.sectp == nullptr || actorflag(act, SFLAG2_DIENOW))
-		{
-			act->Destroy();
-		}
-		else if (isWorldTour() && act->spr.picnum == DTILE_FIREFLYFLYINGEFFECT)
-		{
-			fireflyflyingeffect(act);
-		}
-		else
-		{
-			CallTick(act);
-		}
-	}
-}
-
-//---------------------------------------------------------------------------
-//
-// 
-//
-//---------------------------------------------------------------------------
-
 void handle_se06_d(DDukeActor* actor)
 {
 	auto sc = actor->sector();
@@ -1609,7 +1546,7 @@ void think_d(void)
 	tickstat(STAT_PROJECTILE);		//ST 4
 	moveplayers();			//ST 10
 	movefallers_d();		//ST 12
-	moveexplosions_d();		//ST 5
+	tickstat(STAT_MISC, true);		//ST 5
 
 	actortime.Reset();
 	actortime.Clock();
diff --git a/source/games/duke/src/spawn_d.cpp b/source/games/duke/src/spawn_d.cpp
index 034c9138c..c78a7a715 100644
--- a/source/games/duke/src/spawn_d.cpp
+++ b/source/games/duke/src/spawn_d.cpp
@@ -123,11 +123,6 @@ DDukeActor* spawninit_d(DDukeActor* actj, DDukeActor* act, TArray<DDukeActor*>*
 					ChangeActorStat(act, STAT_ZOMBIEACTOR);
 			}
 			return act;
-		case DTILE_FIREFLYFLYINGEFFECT:
-			act->SetOwner(actj);
-			ChangeActorStat(act, STAT_MISC);
-			act->spr.scale = DVector2(0.25, 0.25);
-			return act;
 		case DTILE_LAVAPOOLBUBBLE:
 			if (actj->spr.scale.X < 0.46875)
 				return act;
diff --git a/wadsrc/static/filter/duke.worldtour/rmapinfo.spawnclasses b/wadsrc/static/filter/duke.worldtour/rmapinfo.spawnclasses
index d17dcaeb1..59e1af67d 100644
--- a/wadsrc/static/filter/duke.worldtour/rmapinfo.spawnclasses
+++ b/wadsrc/static/filter/duke.worldtour/rmapinfo.spawnclasses
@@ -6,4 +6,5 @@ spawnclasses
 	5737 = DukeGenericDestructible, "WTGLASS2", "", "GLASS_BREAKING", spawnglass
 	5294 = DeveloperCommentary
 	1891 = DukeFlamethrowerFlame
+	5296 = DukeFireflyFlyingEffect
 }
diff --git a/wadsrc/static/zscript.txt b/wadsrc/static/zscript.txt
index edcdf53a7..505f18e63 100644
--- a/wadsrc/static/zscript.txt
+++ b/wadsrc/static/zscript.txt
@@ -103,6 +103,7 @@ version "4.10"
 #include "zscript/games/duke/actors/toilet.zs"
 
 #include "zscript/games/duke/actors/flamethrowerflame.zs"
+#include "zscript/games/duke/actors/firefly.zs"
 
 #include "zscript/games/duke/actors/redneckmisc.zs"
 #include "zscript/games/duke/actors/emptybike.zs"
diff --git a/wadsrc/static/zscript/games/duke/actors/firefly.zs b/wadsrc/static/zscript/games/duke/actors/firefly.zs
new file mode 100644
index 000000000..3d219107d
--- /dev/null
+++ b/wadsrc/static/zscript/games/duke/actors/firefly.zs
@@ -0,0 +1,47 @@
+
+// for now only the effect is scriptified.
+
+class DukeFireflyFlyingEffect : DukeActor
+{
+	default
+	{
+		pic "FIREFLYFLYINGEFFECT";
+	}
+	
+	override void Initialize()
+	{
+		self.scale = (0.25, 0.25);
+		self.ChangeStat(STAT_MISC);
+	}
+	
+	override void Tick()
+	{
+		Super.Tick();
+		if (bDestroyed) return;	// killed by script.
+
+
+		let Owner = self.ownerActor;
+		if (!Owner || !Owner.checkType("FIREFLY"))
+		{
+			self.Destroy();
+			return;
+		}
+
+		if (Owner.scale.X >= 0.375 || Owner.pal == 1)
+			self.cstat |= CSTAT_SPRITE_INVISIBLE;
+		else
+			self.cstat &= ~CSTAT_SPRITE_INVISIBLE;
+
+		let p = self.findplayer();
+		let dvec = Owner.pos.XY - p.actor.pos.XY;
+		double dist = dvec.Length();
+
+		if (dist != 0.0) dvec /= dist;
+		self.pos = Owner.pos + (dvec.X * -0.625, dvec.Y * -0.625, 8);
+
+		if (Owner.extra <= 0) 
+		{
+			self.Destroy();
+		}
+	}
+}