diff --git a/README.md b/README.md
index bdae7310..97491233 100644
--- a/README.md
+++ b/README.md
@@ -231,6 +231,9 @@
 * Plane fuel automatically picked up
 * Players no longer respawn in the Acid Trap
 
+#### Cell Block
+* Added Smoke Grenades to the Mystery Box
+
 ### Buried
 * Power automatically on
 * Removed Turbine
diff --git a/scripts/zm/main/_zm_reimagined_zgrief.gsc b/scripts/zm/main/_zm_reimagined_zgrief.gsc
index ffd076e7..94fc8c50 100644
--- a/scripts/zm/main/_zm_reimagined_zgrief.gsc
+++ b/scripts/zm/main/_zm_reimagined_zgrief.gsc
@@ -47,6 +47,12 @@ init()
 
 	setroundsplayed(level.round_number); // don't show first round animation
 
+	if(isDefined(level.zombie_weapons["willy_pete_zm"]))
+	{
+		register_tactical_grenade_for_level( "willy_pete_zm" );
+		level.zombie_weapons["willy_pete_zm"].is_in_box = 1;
+	}
+
 	borough_move_quickrevive_machine();
 	borough_move_speedcola_machine();
 	borough_move_staminup_machine();
@@ -200,6 +206,7 @@ grief_onplayerconnect()
 	self thread on_player_bleedout();
 	self thread on_player_revived();
 	self thread headstomp_watcher();
+	self thread smoke_grenade_cluster_watcher();
 	self thread maps/mp/gametypes_zm/zmeat::create_item_meat_watcher();
 	self.killsconfirmed = 0;
 }
@@ -385,6 +392,36 @@ headstomp_watcher()
 	}
 }
 
+smoke_grenade_cluster_watcher()
+{
+	self endon("disconnect");
+
+	while(1)
+	{
+		self waittill("grenade_fire", grenade, weapname);
+
+		if(weapname == "willy_pete_zm" && !isDefined(self.smoke_grenade_cluster))
+		{
+			grenade thread smoke_grenade_cluster(self);
+		}
+	}
+}
+
+smoke_grenade_cluster(owner)
+{
+	self waittill("explode", pos);
+
+	playsoundatposition( "zmb_land_meat", pos );
+
+	owner.smoke_grenade_cluster = true;
+	owner magicgrenadetype( "willy_pete_zm", pos, (0, 0, 0), 0 );
+	owner magicgrenadetype( "willy_pete_zm", pos, (0, 0, 0), 0 );
+
+	wait 0.05;
+
+	owner.smoke_grenade_cluster = undefined;
+}
+
 round_start_wait(time, initial)
 {
 	level endon("end_game");