diff --git a/config/rel_slices.yml b/config/rel_slices.yml
index d9c6f9e2..fa30808d 100644
--- a/config/rel_slices.yml
+++ b/config/rel_slices.yml
@@ -1151,6 +1151,10 @@ ef_footprint.c:
     .text: [0x8060BCB0, 0x8060C21C]
     .rodata: [0x8064C0B0, 0x8064C0E0]
     .data: [0x806D2430, 0x806D2470]
+ef_halloween.c:
+    .text: [0x8060D44C, 0x8060D654]
+    .rodata: [0x8064C1C0, 0x8064C1D0]
+    .data: [0x806D2600, 0x806D2618]
 ef_hanabi_dummy.c:
     .text: [0x8060E6D8, 0x8060E9B8]
     .rodata: [0x8064C2A0, 0x8064C2C0]
@@ -1228,7 +1232,6 @@ f_furniture.c:
     .data: [0x806D4D40, 0x806E02A0]
 ac_weather_fine.c:
     .data: [0x806D1DA0, 0x806D1DB8]
-
 # dataobject.obj NPC draw data TUs
 data/npc/model/mdl/bev_1.c:
     .data: [0x806E03A0, 0x806E27D0]
@@ -1271,7 +1274,6 @@ data/npc/model/tex/bea_9.c:
 data/npc/model/tex/bea_10.c:
     .data: [0x806FA140, 0x806FB360]
 
-
 # dataobject.obj files
 data/field/bg/flower/obj_flower.c:
     .data: [0x8074FE80, 0x807508C0]
diff --git a/src/ef_halloween.c b/src/ef_halloween.c
index 923de7e8..82ecbf35 100644
--- a/src/ef_halloween.c
+++ b/src/ef_halloween.c
@@ -1,5 +1,7 @@
 #include "ef_effect_control.h"
 
+#include "m_common_data.h"
+
 static void eHalloween_init(xyz_t pos, int prio, s16 angle, GAME* game, u16 item_name, s16 arg0, s16 arg1);
 static void eHalloween_ct(eEC_Effect_c* effect, GAME* game, void* ct_arg);
 static void eHalloween_mv(eEC_Effect_c* effect, GAME* game);
@@ -18,17 +20,30 @@ eEC_PROFILE_c iam_ef_halloween = {
 };
 
 static void eHalloween_init(xyz_t pos, int prio, s16 angle, GAME* game, u16 item_name, s16 arg0, s16 arg1) {
-    // TODO
+   (*eEC_CLIP->make_effect_proc)(eEC_EFFECT_HALLOWEEN, pos, NULL, game, &angle, item_name, prio, arg0, arg1);
 }
 
 static void eHalloween_ct(eEC_Effect_c* effect, GAME* game, void* ct_arg) {
-    // TODO
+    effect->timer = 0x28;
+    effect->effect_specific[0] = 0;
+    sAdo_OngenTrgStart(0x107, &effect->position);
 }
 
 static void eHalloween_mv(eEC_Effect_c* effect, GAME* game) {
-    // TODO
+    if (effect->effect_specific[0] == 4) {
+        s16 rnd_angle = qrand();
+        xyz_t pos = effect->position;
+        
+        pos.x += 18.0f * sin_s(rnd_angle);
+        pos.y += -25.0f + RANDOM_F(30.0f);
+        pos.z += 5.0f + (18.0f * cos_s(rnd_angle));
+        effect->effect_specific[0] = 0;
+        eEC_CLIP->effect_make_proc(eEC_EFFECT_HALLOWEEN_SMOKE, pos, effect->prio, rnd_angle, game, effect->item_name, 0, 0);
+    }
+    
+    effect->effect_specific[0]++;
 }
 
 static void eHalloween_dw(eEC_Effect_c* effect, GAME* game) {
-    // TODO
+    // empty
 }