diff --git a/config/rel_slices.yml b/config/rel_slices.yml
index b9a5c457..2cb5f071 100644
--- a/config/rel_slices.yml
+++ b/config/rel_slices.yml
@@ -891,6 +891,10 @@ ac_weather_leaf.c:
     .text: [0x8060420C, 0x806048B8]
     .rodata: [0x8064BBE8, 0x8064BC40]
     .data: [0x806D1E28, 0x806D1E48]
+ef_killer.c:
+    .text: [0x80614178, 0x8061481C]
+    .rodata: [0x8064C680, 0x8064C6C0]
+    .data: [0x806D2EC0, 0x806D2F90]
 ef_make_hem.c:
     .text: [0x806162B0, 0x8061710C]
     .rodata: [0x8064C818, 0x8064C860]
diff --git a/src/ef_killer.c b/src/ef_killer.c
index 01f2f6aa..1a4ce55a 100644
--- a/src/ef_killer.c
+++ b/src/ef_killer.c
@@ -1,20 +1,13 @@
 #include "ef_effect_control.h"
 
-static void eKL_init(xyz_t pos, int prio, s16 angle, GAME* game, u16 item_name, s16 arg0, s16 arg1) {
-    // TODO
-}
+#include "m_common_data.h"
+#include "sys_matrix.h"
+#include "m_rcp.h"
 
-static void eKL_ct(eEC_Effect_c* effect, GAME* game, void* ct_arg) {
-    // TODO
-}
-
-static void eKL_mv(eEC_Effect_c* effect, GAME* game) {
-    // TODO
-}
-
-static void eKL_dw(eEC_Effect_c* effect, GAME* game) {
-    // TODO
-}
+static void eKL_init(xyz_t pos, int prio, s16 angle, GAME* game, u16 item_name, s16 arg0, s16 arg1);
+static void eKL_ct(eEC_Effect_c* effect, GAME* game, void* ct_arg);
+static void eKL_mv(eEC_Effect_c* effect, GAME* game);
+static void eKL_dw(eEC_Effect_c* effect, GAME* game);
 
 eEC_PROFILE_c iam_ef_killer = {
     // clang-format off
@@ -27,3 +20,135 @@ eEC_PROFILE_c iam_ef_killer = {
     eEC_IGNORE_DEATH_DIST,
     // clang-format on
 };
+
+static void eKL_init(xyz_t pos, int prio, s16 angle, GAME* game, u16 item_name, s16 arg0, s16 arg1) {
+    (*eEC_CLIP->make_effect_proc)(eEC_EFFECT_KILLER, pos, NULL, game, NULL, item_name, prio, angle, arg1);
+}
+
+static void eKL_ct(eEC_Effect_c* effect, GAME* game, void* ct_arg) {
+    static xyz_t xyz0 = { 0.0f, 0.0f, 0.0f };
+
+    effect->acceleration = xyz0;
+    effect->velocity = xyz0;
+    effect->velocity.x = sin_s(effect->arg0) * 2.0f;
+    effect->velocity.z = cos_s(effect->arg0) * 2.0f;
+    effect->timer = 360;
+
+    switch (Save_Get(scene_no)) {
+        case SCENE_MY_ROOM_S:
+            effect->offset.x = 40.0f;
+            effect->offset.z = 40.0f;
+            effect->offset.y = 200.0f;
+            effect->scale.x = 360.0f;
+            break;
+        case SCENE_NPC_HOUSE:
+        case SCENE_MY_ROOM_M:
+        case SCENE_MY_ROOM_LL2:
+        case SCENE_COTTAGE_NPC:
+            effect->offset.x = 40.0f;
+            effect->offset.z = 40.0f;
+            effect->offset.y = 280.0f;
+            effect->scale.x = 440.0f;
+            break;
+        case SCENE_MY_ROOM_L:
+        case SCENE_MY_ROOM_LL1:
+        case SCENE_MY_ROOM_BASEMENT_S:
+        case SCENE_MY_ROOM_BASEMENT_M:
+        case SCENE_MY_ROOM_BASEMENT_L:
+        case SCENE_MY_ROOM_BASEMENT_LL1:
+        case SCENE_COTTAGE_MY:
+            effect->offset.x = 40.0f;
+            effect->offset.z = 40.0f;
+            effect->offset.y = 360.0f;
+            effect->scale.x = 520.0f;
+            break;
+        default:
+            effect->offset.x = 0.0f;
+            effect->offset.y = 0.0f;
+            effect->offset.z = 0.0f;
+            effect->scale.x = 0.0f;
+            break;
+    }
+
+    {
+        if (ABS(effect->arg0 & 0xFFFF) <= 15) {
+            if (ABS(effect->position.z - effect->scale.x) <= 21.0f) {
+                effect->timer = 0;
+                return;
+            }
+        } else if (ABS((effect->arg0 & 0xFFFF) - (u16)DEG2SHORT_ANGLE(90.0f)) <= 15) {
+            if (ABS(effect->position.x - effect->offset.y) <= 21.0f) {
+                effect->timer = 0;
+                return;
+            }
+        } else if (ABS((effect->arg0 & 0xFFFF) - (u16)DEG2SHORT_ANGLE(180.0f)) <= 15) {
+            if (ABS(effect->position.z - effect->offset.z) <= 21.0f) {
+                effect->timer = 0;
+                return;
+            }
+        } else if (ABS((effect->arg0 & 0xFFFF) - (u16)DEG2SHORT_ANGLE(270.0f)) <= 15) {
+            if (ABS(effect->position.x - effect->offset.x) <= 21.0f) {
+                effect->timer = 0;
+                return;
+            }
+        } else {
+            return;
+        }
+
+        sAdo_OngenTrgStart(0x44F, &effect->position);
+        effect->effect_specific[0] = 0;
+    }
+}
+
+static void eKL_mv(eEC_Effect_c* effect, GAME* game) {
+    xyz_t_add(&effect->velocity, &effect->acceleration, &effect->velocity);
+    xyz_t_add(&effect->position, &effect->velocity, &effect->position);
+
+    if (effect->position.x < effect->offset.x || effect->position.z < effect->offset.z ||
+        effect->position.x > effect->offset.y || effect->position.z > effect->scale.x) {
+        effect->timer = 0;
+        effect->scale.z = 0.0f;
+    } else {
+        f32 dist = 1000.0f;
+
+        if (ABS(effect->position.x - effect->offset.x) < 16.0f) {
+            dist = ABS(effect->position.x - effect->offset.x);
+        } else if (ABS(effect->position.z - effect->offset.z) < 16.0f) {
+            dist = ABS(effect->position.z - effect->offset.z);
+        } else if (ABS(effect->position.x - effect->offset.y) < 16.0f) {
+            dist = ABS(effect->position.x - effect->offset.y);
+        } else if (ABS(effect->position.z - effect->scale.x) < 16.0f) {
+            dist = ABS(effect->position.z - effect->scale.x);
+        }
+
+        if (dist < 20.0f) {
+            effect->scale.z = dist / 16.0f;
+
+            if (effect->effect_specific[0] == 0) {
+                effect->velocity.x *= 0.5f;
+                effect->velocity.z *= 0.5f;
+                effect->effect_specific[0] = 1;
+            }
+        } else {
+            effect->scale.z = 1.0f;
+        }
+    }
+}
+
+extern Gfx act_killer_model[];
+
+static void eKL_dw(eEC_Effect_c* effect, GAME* game) {
+    GAME_PLAY* play = (GAME_PLAY*)game;
+
+    Matrix_translate(effect->position.x, effect->position.y, effect->position.z, 0);
+    Matrix_RotateY(effect->arg0, 1);
+    Matrix_scale(0.01f, 0.01f, effect->scale.z * 0.01f, 1);
+    _texture_z_light_fog_prim(game->graph);
+
+    OPEN_DISP(game->graph);
+
+    gSPMatrix(NEXT_POLY_OPA_DISP, _Matrix_to_Mtx_new(game->graph), G_MTX_NOPUSH | G_MTX_LOAD | G_MTX_MODELVIEW);
+    gSPDisplayList(NEXT_POLY_OPA_DISP, act_killer_model);
+
+    CLOSE_DISP(game->graph);
+}