diff --git a/config/rel_slices.yml b/config/rel_slices.yml
index 2cb5f071..426dc846 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_flash.c:
+    .text: [0x8060B7B4, 0x8060BCB0]
+    .rodata: [0x8064C078, 0x8064C0B0]
+    .data: [0x806D2350, 0x806D2430]
 ef_killer.c:
     .text: [0x80614178, 0x8061481C]
     .rodata: [0x8064C680, 0x8064C6C0]
diff --git a/src/ef_flash.c b/src/ef_flash.c
index a6a3d756..faea2416 100644
--- a/src/ef_flash.c
+++ b/src/ef_flash.c
@@ -1,20 +1,13 @@
 #include "ef_effect_control.h"
 
-static void eFlash_init(xyz_t pos, int prio, s16 angle, GAME* game, u16 item_name, s16 arg0, s16 arg1) {
-    // TODO
-}
+#include "m_common_data.h"
+#include "m_rcp.h"
+#include "sys_matrix.h"
 
-static void eFlash_ct(eEC_Effect_c* effect, GAME* game, void* ct_arg) {
-    // TODO
-}
-
-static void eFlash_mv(eEC_Effect_c* effect, GAME* game) {
-    // TODO
-}
-
-static void eFlash_dw(eEC_Effect_c* effect, GAME* game) {
-    // TODO
-}
+static void eFlash_init(xyz_t pos, int prio, s16 angle, GAME* game, u16 item_name, s16 arg0, s16 arg1);
+static void eFlash_ct(eEC_Effect_c* effect, GAME* game, void* ct_arg);
+static void eFlash_mv(eEC_Effect_c* effect, GAME* game);
+static void eFlash_dw(eEC_Effect_c* effect, GAME* game);
 
 eEC_PROFILE_c iam_ef_flash = {
     // clang-format off
@@ -28,22 +21,65 @@ eEC_PROFILE_c iam_ef_flash = {
     // clang-format on
 };
 
-static void eFlashC_init(xyz_t pos, int prio, s16 angle, GAME* game, u16 item_name, s16 arg0, s16 arg1) {
-    // TODO
+static void eFlash_init(xyz_t pos, int prio, s16 angle, GAME* game, u16 item_name, s16 arg0, s16 arg1) {
+    (*eEC_CLIP->make_effect_proc)(eEC_EFFECT_FLASH, pos, NULL, game, NULL, item_name, prio, arg0, angle);
 }
 
-static void eFlashC_ct(eEC_Effect_c* effect, GAME* game, void* ct_arg) {
-    // TODO
+static void eFlash_ct(eEC_Effect_c* effect, GAME* game, void* ct_arg) {
+    s16 flash_length = 3.0f + RANDOM_F(7.0f);
+    s16 end_frame = flash_length >> 1;
+
+    if (effect->arg0 == 1) {
+        static rgba_t light_color = { 27, 27, 27, 255 };
+
+        (*eEC_CLIP->regist_effect_light)(light_color, flash_length, end_frame, TRUE);
+    }
+
+    effect->timer = 5;
+    effect->acceleration.x = 0.3f + RANDOM_F(0.7f);
 }
 
-static void eFlashC_mv(eEC_Effect_c* effect, GAME* game) {
-    // TODO
+static void eFlash_mv(eEC_Effect_c* effect, GAME* game) {
+    s16 elapsed_time = 5 - effect->timer;
+    f32 scale;
+
+    if (elapsed_time <= 4) {
+        scale = (*eEC_CLIP->calc_adjust_proc)(elapsed_time, 0, 2, effect->acceleration.x * 0.005f, 0.01f);
+    } else {
+        scale = (*eEC_CLIP->calc_adjust_proc)(elapsed_time, 3, 4, effect->acceleration.x * 0.01f, 0.0f);
+    }
+
+    effect->scale.x = scale;
+    effect->scale.y = scale;
+    effect->scale.z = scale;
 }
 
-static void eFlashC_dw(eEC_Effect_c* effect, GAME* game) {
-    // TODO
+extern Gfx ef_takurami01_normal_render_mode[];
+extern Gfx ef_takurami01_kira_modelT[];
+
+static void eFlash_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_mult(&play->billboard_matrix, 1);
+    Matrix_scale(effect->scale.x, effect->scale.y, effect->scale.z, 1);
+    _texture_z_light_fog_prim_xlu(game->graph);
+
+    OPEN_DISP(game->graph);
+
+    gSPMatrix(NEXT_POLY_XLU_DISP, _Matrix_to_Mtx_new(game->graph), G_MTX_NOPUSH | G_MTX_LOAD | G_MTX_MODELVIEW);
+    gDPSetPrimColor(NEXT_POLY_XLU_DISP, 0, 255, 255, 255, 255, 200);
+    gSPSegment(NEXT_POLY_XLU_DISP, G_MWO_SEGMENT_8, ef_takurami01_normal_render_mode);
+    gSPDisplayList(NEXT_POLY_XLU_DISP, ef_takurami01_kira_modelT);
+
+    CLOSE_DISP(game->graph);
 }
 
+static void eFlashC_init(xyz_t pos, int prio, s16 angle, GAME* game, u16 item_name, s16 arg0, s16 arg1);
+static void eFlashC_ct(eEC_Effect_c* effect, GAME* game, void* ct_arg);
+static void eFlashC_mv(eEC_Effect_c* effect, GAME* game);
+static void eFlashC_dw(eEC_Effect_c* effect, GAME* game);
+
 eEC_PROFILE_c iam_ef_flashC = {
     // clang-format off
     &eFlashC_init,
@@ -55,3 +91,58 @@ eEC_PROFILE_c iam_ef_flashC = {
     eEC_IGNORE_DEATH_DIST,
     // clang-format on
 };
+
+static void eFlashC_init(xyz_t pos, int prio, s16 angle, GAME* game, u16 item_name, s16 arg0, s16 arg1) {
+    (*eEC_CLIP->make_effect_proc)(eEC_EFFECT_FLASHC, pos, NULL, game, NULL, item_name, prio, arg0, angle);
+}
+
+static void eFlashC_ct(eEC_Effect_c* effect, GAME* game, void* ct_arg) {
+    effect->timer = 240;
+    effect->effect_specific[0] = 0;
+}
+
+static void eFlashC_mv(eEC_Effect_c* effect, GAME* game) {
+    if ((effect->timer & 7) == 0) {
+        int size;
+
+        switch (Save_Get(scene_no)) {
+            case SCENE_MY_ROOM_S:
+                size = 4;
+                break;
+            case SCENE_NPC_HOUSE:
+            case SCENE_MY_ROOM_M:
+            case SCENE_MY_ROOM_LL2:
+            case SCENE_COTTAGE_NPC:
+                size = 6;
+                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:
+                size = 8;
+                break;
+            default:
+                size = -1;
+                break;
+        }
+
+        if (size != -1) {
+            xyz_t pos;
+
+            pos.z = 43.0f;
+            pos.x = 40.0f + RANDOM_F(size) * 40.0f;
+            pos.y = -10.0f + RANDOM_F(20.0f) + 75.0f;
+
+            (*eEC_CLIP->effect_make_proc)(eEC_EFFECT_FLASH, pos, effect->prio, 0, game, (u16)effect->item_name,
+                                          effect->effect_specific[0] & 1, 0);
+            effect->effect_specific[0]++;
+        }
+    }
+}
+
+static void eFlashC_dw(eEC_Effect_c* effect, GAME* game) {
+    // nothing
+}