diff --git a/CMakeLists.txt b/CMakeLists.txt
index 14280eff..3abfbaf7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -89,6 +89,8 @@ set(FF7_MINI
 set(FF7_MAGIC
     src/magic/barrier.c
     src/magic/brizad.c
+    src/magic/daionpa.c
+    src/magic/jammer.c
     src/magic/lv5deth.c
     src/magic/mabaria.c
     src/magic/sennkoku.c
diff --git a/config/symbols.magic-daionpa.us.txt b/config/symbols.magic-daionpa.us.txt
new file mode 100644
index 00000000..d94a2852
--- /dev/null
+++ b/config/symbols.magic-daionpa.us.txt
@@ -0,0 +1,22 @@
+MAGIC_Daionpa = 0x801B0000;
+DaionpaDoubleBufferFlip = 0x801B0020;
+DaionpaWaveSpriteTick = 0x801B008C;
+DaionpaImpactModelTick = 0x801B01AC;
+DaionpaScreenWaveModelTick = 0x801B0324;
+DaionpaRingSpriteTick = 0x801B04FC;
+DaionpaMainTick = 0x801B06E4;
+DaionpaStart = 0x801B0D98;
+g_DaionpaSpriteDesc = 0x801D4410;
+g_DaionpaSpriteAnims = 0x801D441C;
+g_DaionpaModelDesc = 0x801D4434;
+g_DaionpaRotation = 0x801D4444;
+g_DaionpaUnk4C = 0x801D444C;
+g_DaionpaScale = 0x801D4450;
+g_DaionpaModelDesc2 = 0x801D4460;
+g_DaionpaSpriteDesc2 = 0x801D4470;
+g_DaionpaSpriteAnims2 = 0x801D447C;
+g_DaionpaGeomX = 0x801D44AC;
+g_DaionpaGeomY = 0x801D44B0;
+g_DaionpaPrimBuffer = 0x801D44B4;
+g_DaionpaBufferPtr = 0x801EC4B4;
+g_DaionpaTargetMask = 0x801EC4B8;
diff --git a/config/symbols.magic-jammer.us.txt b/config/symbols.magic-jammer.us.txt
new file mode 100644
index 00000000..c8c67aec
--- /dev/null
+++ b/config/symbols.magic-jammer.us.txt
@@ -0,0 +1,16 @@
+MAGIC_Jammer = 0x801B0000;
+JammerDoubleBufferFlip = 0x801B0020;
+JammerWaveSpriteTick = 0x801B008C;
+JammerImpactModelTick = 0x801B01AC;
+JammerRingSpriteTick = 0x801B0324;
+JammerTargetTick = 0x801B050C;
+JammerTargetSetup = 0x801B0A68;
+JammerStart = 0x801B0B44;
+g_JammerSpriteDesc = 0x801D126C;
+g_JammerSpriteAnims = 0x801D1278;
+g_JammerModelDesc = 0x801D1284;
+g_JammerRotation = 0x801D1294;
+g_JammerSpriteDesc2 = 0x801D129C;
+g_JammerSpriteAnims2 = 0x801D12A8;
+g_JammerPrimBuffer = 0x801D12D8;
+g_JammerBufferPtr = 0x801E92D8;
diff --git a/config/us.yaml b/config/us.yaml
index 69eaa150..ff78b748 100644
--- a/config/us.yaml
+++ b/config/us.yaml
@@ -807,3 +807,29 @@ overlays:
       - [0, c, sennkoku]
       - [0x930, data, sennkoku_model]
       - [0x559C, data, sennkoku_buffers]
+  # DAIONPA.BIN -- effect overlay
+  - name: daionpa
+    disk_path: disks/us/MAGIC/DAIONPA.BIN
+    sha1: 488a65ffbefca1b7ea5acbe7749d6a9b46ca2fd0
+    base_path: magic
+    imports: [main, battle]
+    vram_start: 0x801B0000
+    symbol_addrs_path:
+      - config/symbols.magic-daionpa.us.txt
+    segments:
+      - [0, c, daionpa]
+      - [0xE98, data, daionpa_model]
+      - [0x24498, data, daionpa_buffers]  # REVIEW (split): first aligned word after the last non-zero byte; a cut inside the zero fill is byte-neutral
+  # JAMMER.BIN -- effect overlay
+  - name: jammer
+    disk_path: disks/us/MAGIC/JAMMER.BIN
+    sha1: cc65acc7832a3d3b242def924b4544dbfc4dbdc9
+    base_path: magic
+    imports: [main, battle]
+    vram_start: 0x801B0000
+    symbol_addrs_path:
+      - config/symbols.magic-jammer.us.txt
+    segments:
+      - [0, c, jammer]
+      - [0xBB0, data, jammer_model]
+      - [0x212C4, data, jammer_buffers]  # REVIEW (split): first aligned word after the last non-zero byte; a cut inside the zero fill is byte-neutral
diff --git a/src/magic/daionpa.c b/src/magic/daionpa.c
new file mode 100644
index 00000000..075caece
--- /dev/null
+++ b/src/magic/daionpa.c
@@ -0,0 +1,304 @@
+//! PSYQ=3.3 CC1=2.6.3
+
+#include "common.h"
+#include "magic.h"
+#include "daionpa.h"
+#include "../battle/battle.h"
+
+// Effect shared by Big Sound (大音波) and Voice of Ages (ときのこえ).
+
+void DaionpaStart(s32 targetMask, s32 callbackArg);
+extern u_long D_801B0E98[];
+void DaionpaRingSpriteTick(void);
+void DaionpaImpactModelTick(void);
+void DaionpaScreenWaveModelTick(void);
+void DaionpaWaveSpriteTick(void);
+void DaionpaMainTick(void);
+extern s32 g_DaionpaTargetMask;
+extern u8 D_800F5B70;
+extern u8 D_800F5B71;
+extern u8 D_800F5B72;
+
+// Primitive buffer pages, one 0xC000 page per double-buffered frame.
+extern u8 g_DaionpaPrimBuffer[2][0xC000];
+extern void* g_DaionpaBufferPtr;
+
+// Only StartFrame/AnimationFrame are common to every magic overlay.
+typedef struct {
+    /* 0x00 */ s16 StartFrame;
+    /* 0x02 */ s16 AnimationFrame;
+    /* 0x04 */ SVECTOR Pos;
+    /* 0x0C */ SVECTOR unkC;
+    /* 0x14 */ s16 unk14;
+    /* 0x16 */ s16 unk16;
+    /* 0x18 */ s16 unk18;
+    /* 0x1A */ char pad1A[6];
+} DaionpaData; // size:0x20
+
+extern DaionpaData g_BattleEffectSlots[];
+
+void MAGIC_Daionpa(s32 targetMask, s32 callbackArg) { DaionpaStart(targetMask, callbackArg); }
+
+// Same as BarrierDoubleBufferFlip.
+void DaionpaDoubleBufferFlip(void) {
+    DaionpaData* effect;
+
+    effect = &g_BattleEffectSlots[g_BattleEffectCursor];
+    g_DaionpaBufferPtr = g_DaionpaPrimBuffer[effect->AnimationFrame];
+    effect->AnimationFrame ^= 1;
+    if (g_BattleEffectCount < 2) {
+        effect->StartFrame = -1;
+    }
+}
+
+extern SpriteRenderDesc g_DaionpaSpriteDesc;
+extern SpriteAnim* g_DaionpaSpriteAnims[];
+
+extern ModelRenderDesc g_DaionpaModelDesc;
+extern SVECTOR g_DaionpaRotation;
+extern s16 g_DaionpaUnk4C;
+extern VECTOR g_DaionpaScale;
+extern s32 g_DaionpaGeomX;
+extern s32 g_DaionpaGeomY;
+extern ModelRenderDesc g_DaionpaModelDesc2;
+
+extern SpriteRenderDesc g_DaionpaSpriteDesc2;
+extern SpriteAnim* g_DaionpaSpriteAnims2[];
+
+void DaionpaWaveSpriteTick(void) {
+    DaionpaData* effect;
+
+    effect = &g_BattleEffectSlots[g_BattleEffectCursor];
+    BattleSetBillboardMatrix(&effect->Pos, 0x1800, 0);
+    g_DaionpaSpriteDesc.frameIndex = effect->AnimationFrame;
+    g_DaionpaSpriteDesc.frames = g_DaionpaSpriteAnims[effect->unk14];
+    g_DaionpaBufferPtr = func_800D4D90(&g_DaionpaSpriteDesc, g_cDb->unk70, 12, g_DaionpaBufferPtr);
+    if (!D_80062D98) {
+        effect->Pos.vx += effect->unkC.vx;
+        effect->Pos.vy += effect->unkC.vy;
+        effect->Pos.vz += effect->unkC.vz;
+        effect->AnimationFrame++;
+        if (effect->AnimationFrame == g_DaionpaSpriteAnims[effect->unk14]->frameCount) {
+            effect->StartFrame = -1;
+        }
+    }
+}
+
+void DaionpaImpactModelTick(void) {
+    DaionpaData* effect;
+    MATRIX matrix;
+    MATRIX rotated;
+    s32 flag;
+    s16 i;
+
+    effect = &g_BattleEffectSlots[g_BattleEffectCursor];
+    for (i = 0; i < 3; i++) {
+        matrix.m[2][i] = 0;
+        matrix.m[1][i] = 0;
+        matrix.m[0][i] = 0;
+    }
+    SetRotMatrix(&g_BattleWorldView.m);
+    SetTransMatrix(&g_BattleWorldView.m);
+    RotTrans(&effect->Pos, (VECTOR*)matrix.t, &flag);
+    matrix.m[0][0] = matrix.m[1][1] = matrix.m[2][2] = effect->AnimationFrame * 600 + 0x800;
+    RotMatrixYXZ(&g_DaionpaRotation, &rotated);
+    MulMatrix(&matrix, &rotated);
+    SetRotMatrix(&matrix);
+    SetTransMatrix(&matrix);
+    SetFarColor(0, 0, 0);
+    g_DaionpaModelDesc.color = effect->AnimationFrame * 0x100;
+    g_DaionpaBufferPtr = func_800D29D4(&g_DaionpaModelDesc, g_cDb->unk70, 12, g_DaionpaBufferPtr);
+    if (!D_80062D98) {
+        effect->AnimationFrame++;
+        if (effect->AnimationFrame == 15) {
+            effect->StartFrame = -1;
+        }
+    }
+}
+
+void DaionpaScreenWaveModelTick(void) {
+    DaionpaData* effect;
+    MATRIX matrix;
+    MATRIX unused;
+    SVECTOR rot;
+
+    effect = &g_BattleEffectSlots[g_BattleEffectCursor];
+    ReadGeomOffset(&g_DaionpaGeomX, &g_DaionpaGeomY);
+    SetGeomOffset(0xA0, 0x64);
+    g_DaionpaScale.vy = effect->AnimationFrame * 300 + 0x2000;
+    rot.vx = 0x400;
+    rot.vy = effect->AnimationFrame << 5;
+    rot.vz = 0;
+    RotMatrix(&rot, &matrix);
+    ScaleMatrix(&matrix, &g_DaionpaScale);
+    matrix.t[0] = 0;
+    matrix.t[1] = 0;
+    matrix.t[2] = 0x1F40;
+    SetRotMatrix(&matrix);
+    SetTransMatrix(&matrix);
+    SetFarColor(0, 0, 0);
+    g_DaionpaModelDesc2.color = 0x1000 - (g_DaionpaUnk4C * 0x100);
+    g_DaionpaBufferPtr = func_800D29D4(&g_DaionpaModelDesc2, g_cDb->unk70, 12, g_DaionpaBufferPtr);
+    SetGeomOffset(g_DaionpaGeomX, g_DaionpaGeomY);
+    if (!D_80062D98) {
+        if (effect->AnimationFrame < 8) {
+            g_DaionpaUnk4C++;
+        }
+        if (effect->AnimationFrame >= 0x17) {
+            g_DaionpaUnk4C--;
+        }
+        effect->AnimationFrame++;
+        if (effect->AnimationFrame == 0x1E) {
+            effect->StartFrame = -1;
+        }
+    }
+}
+
+void DaionpaRingSpriteTick(void) {
+    DaionpaData* effect;
+    MATRIX matrix;
+    MATRIX rotated;
+    SVECTOR rot;
+    s32 flag;
+    s16 shade;
+    s16 i;
+
+    effect = &g_BattleEffectSlots[g_BattleEffectCursor];
+    rot.vx = rot.vy = 0;
+    rot.vz = effect->AnimationFrame << 8;
+    for (i = 0; i < 3; i++) {
+        matrix.m[i][0] = matrix.m[i][1] = matrix.m[i][2] = 0;
+    }
+    SetRotMatrix(&g_BattleWorldView.m);
+    SetTransMatrix(&g_BattleWorldView.m);
+    RotTrans(&effect->Pos, (VECTOR*)matrix.t, &flag);
+    matrix.m[0][0] = matrix.m[1][1] = matrix.m[2][2] = 0x1400;
+    RotMatrixYXZ(&rot, &rotated);
+    MulMatrix(&matrix, &rotated);
+    SetRotMatrix(&matrix);
+    SetTransMatrix(&matrix);
+    shade = effect->AnimationFrame < 12 ? 8 : 0x14 - effect->AnimationFrame;
+    shade <<= 4;
+    g_DaionpaSpriteDesc2.frames = g_DaionpaSpriteAnims2[effect->unk14];
+    g_DaionpaSpriteDesc2.color.r = g_DaionpaSpriteDesc2.color.g = g_DaionpaSpriteDesc2.color.b = shade;
+    g_DaionpaBufferPtr = func_800D4D90(&g_DaionpaSpriteDesc2, g_cDb->unk70, 12, g_DaionpaBufferPtr);
+    if (!D_80062D98) {
+        effect->Pos.vx += effect->unkC.vx;
+        effect->Pos.vy += effect->unkC.vy;
+        effect->Pos.vz += effect->unkC.vz;
+        effect->AnimationFrame++;
+        if (effect->AnimationFrame == 0x14) {
+            effect->StartFrame = -1;
+        }
+    }
+}
+
+void DaionpaMainTick(void) {
+    DaionpaData* effect;
+    DaionpaData* child;
+    SVECTOR vec;
+    SVECTOR rot;
+    MATRIX matrix;
+    s32 flag;
+    s16 ang;
+    s16 i;
+    s16 j;
+
+    effect = &g_BattleEffectSlots[g_BattleEffectCursor];
+    if (!D_80062D98) {
+        if (effect->AnimationFrame < 20) {
+            for (i = 0; i < 2; i++) {
+                child = &g_BattleEffectSlots[BattleEffectRegister(DaionpaRingSpriteTick)];
+                child->Pos.vx = effect->Pos.vx;
+                child->Pos.vy = effect->Pos.vy;
+                child->Pos.vz = effect->Pos.vz;
+                child->unkC.vx = (effect->unkC.vx - effect->Pos.vx) / 15;
+                child->unkC.vy = (effect->unkC.vy - effect->Pos.vy) / 15;
+                child->unkC.vz = (effect->unkC.vz - effect->Pos.vz) / 15;
+                ang = rand() % 4096;
+                vec.vx = (u32)(rcos(ang) * 25) >> 10;
+                vec.vy = (u32)(rsin(ang) * 25) >> 10;
+                vec.vz = 0;
+                rot.vz = 0;
+                rot.vx = 0;
+                rot.vy = child->unk16 = ratan2(effect->unkC.vx - effect->Pos.vx, effect->unkC.vz - effect->Pos.vz);
+                RotMatrixYXZ(&rot, &matrix);
+                matrix.t[0] = child->unkC.vx;
+                matrix.t[1] = child->unkC.vy;
+                matrix.t[2] = child->unkC.vz;
+                SetRotMatrix(&matrix);
+                SetTransMatrix(&matrix);
+                RotTransSV(&vec, &child->unkC, &flag);
+                child->unk14 = rand() % 7;
+            }
+        }
+        if (effect->AnimationFrame == 30) {
+            BattleEffectRegister(DaionpaScreenWaveModelTick);
+            func_800BBA84(0xF6, -1, 0x40);
+        }
+        if (effect->AnimationFrame == 54) {
+            for (i = 0; i < 10; i++) {
+                if ((g_DaionpaTargetMask >> i) & 1) {
+                    child = &g_BattleEffectSlots[BattleEffectRegister(DaionpaImpactModelTick)];
+                    BattleGetPartPosition(i, g_BattleModels[i].boneIndices[0], &child->Pos);
+                }
+            }
+            func_800BBA84(0x189, -1, 0x40);
+        }
+        if (effect->AnimationFrame >= 57 && effect->AnimationFrame < 64) {
+            for (i = 0; i < 10; i++) {
+                if ((g_DaionpaTargetMask >> i) & 1) {
+                    for (j = 0; j < 2; j++) {
+                        child = &g_BattleEffectSlots[BattleEffectRegister(DaionpaWaveSpriteTick)];
+                        BattleGetPartPosition(i, g_BattleModels[i].boneIndices[0], &child->Pos);
+                        child->Pos.vx += rand() % 1200 - 600;
+                        child->Pos.vy += rand() % 1200 - 600;
+                        child->Pos.vz += rand() % 1200 - 600;
+                        child->unk14 = rand() % 6;
+                        child->unk18 = (rand() % 3 << 11) + 0x1000;
+                        ang = rand() % 4096;
+                        vec.vx = (u32)(rcos(ang) * 15) >> 10;
+                        vec.vy = (u32)(rsin(ang) * 15) >> 10;
+                        vec.vz = 0;
+                        rot.vz = 0;
+                        rot.vx = 0;
+                        rot.vy = rand() % 4096;
+                        RotMatrixYXZ(&rot, &matrix);
+                        matrix.t[0] = matrix.t[1] = matrix.t[2] = 0;
+                        SetRotMatrix(&matrix);
+                        SetTransMatrix(&matrix);
+                        RotTransSV(&vec, &child->unkC, &flag);
+                    }
+                }
+            }
+        }
+        if (effect->AnimationFrame == 60) {
+            for (i = 0; i < 10; i++) {
+                if ((g_DaionpaTargetMask >> i) & 1) {
+                    func_800D5774(i);
+                }
+            }
+        }
+        effect->AnimationFrame++;
+        if (effect->AnimationFrame == 70) {
+            BattleFixedPointRampUpdateInit(0, 10);
+            effect->StartFrame = -1;
+        }
+    }
+}
+
+void DaionpaStart(s32 targetMask, s32 callbackArg) {
+    DaionpaData* effect;
+
+    BattleEffectRegister(DaionpaDoubleBufferFlip);
+    g_DaionpaTargetMask = targetMask;
+    BattleSetLoadTimToVram(D_801B0E98, 0, 0, 0);
+    effect = &g_BattleEffectSlots[BattleEffectRegister(DaionpaMainTick)];
+    BattleGetPartPosition(callbackArg, g_BattleModels[callbackArg].boneIndices[8], &effect->Pos);
+    BattleEntityGetCenter(targetMask, &effect->unkC);
+    func_800BBA84(0x118, callbackArg, 0);
+    BattleFixedPointRampUpdateInit(0xF00, 10);
+    D_800F5B70 = 0;
+    D_800F5B71 = 0;
+    D_800F5B72 = 0x20;
+}
diff --git a/src/magic/daionpa.h b/src/magic/daionpa.h
new file mode 100644
index 00000000..9cb9bef3
--- /dev/null
+++ b/src/magic/daionpa.h
@@ -0,0 +1,6 @@
+#ifndef DAIONPA_H
+#define DAIONPA_H
+
+#include "magic.h"
+
+#endif
diff --git a/src/magic/jammer.c b/src/magic/jammer.c
new file mode 100644
index 00000000..4512c2c7
--- /dev/null
+++ b/src/magic/jammer.c
@@ -0,0 +1,239 @@
+//! PSYQ=3.3 CC1=2.6.3
+
+#include "common.h"
+#include "magic.h"
+#include "jammer.h"
+#include "../battle/battle.h"
+
+// Magic Extinguish (魔法消滅 / Maho Shometsu).
+
+void JammerStart(s32 targetMask, s32 callbackArg);
+void JammerTargetTick(void);
+void JammerTargetSetup(s32 target, s32 callbackArg);
+extern u_long D_801B0BB0[];
+
+// Primitive buffer pages, one 0xC000 page per double-buffered frame.
+extern u8 g_JammerPrimBuffer[2][0xC000];
+extern void* g_JammerBufferPtr;
+
+// Only StartFrame/AnimationFrame are common to every magic overlay.
+typedef struct {
+    /* 0x00 */ s16 StartFrame;
+    /* 0x02 */ s16 AnimationFrame;
+    /* 0x04 */ SVECTOR Pos;
+    /* 0x0C */ SVECTOR unkC;
+    /* 0x14 */ s16 unk14;
+    /* 0x16 */ s16 unk16;
+    /* 0x18 */ s16 unk18;
+    /* 0x1A */ char pad1A[2];
+    /* 0x1C */ s16 unk1C;
+    /* 0x1E */ s16 unk1E;
+} JammerData; // size:0x20
+
+extern JammerData g_BattleEffectSlots[];
+
+void MAGIC_Jammer(s32 targetMask, s32 callbackArg) { JammerStart(targetMask, callbackArg); }
+
+// Same as BarrierDoubleBufferFlip.
+void JammerDoubleBufferFlip(void) {
+    JammerData* effect;
+
+    effect = &g_BattleEffectSlots[g_BattleEffectCursor];
+    g_JammerBufferPtr = g_JammerPrimBuffer[effect->AnimationFrame];
+    effect->AnimationFrame ^= 1;
+    if (g_BattleEffectCount < 2) {
+        effect->StartFrame = -1;
+    }
+}
+
+extern SpriteRenderDesc g_JammerSpriteDesc;
+extern SpriteAnim* g_JammerSpriteAnims[];
+
+extern ModelRenderDesc g_JammerModelDesc;
+extern SVECTOR g_JammerRotation;
+
+extern SpriteRenderDesc g_JammerSpriteDesc2;
+extern SpriteAnim* g_JammerSpriteAnims2[];
+
+void JammerWaveSpriteTick(void) {
+    JammerData* effect;
+
+    effect = &g_BattleEffectSlots[g_BattleEffectCursor];
+    BattleSetBillboardMatrix(&effect->Pos, 0x1800, 0);
+    g_JammerSpriteDesc.frameIndex = effect->AnimationFrame;
+    g_JammerSpriteDesc.frames = g_JammerSpriteAnims[effect->unk14];
+    g_JammerBufferPtr = func_800D4D90(&g_JammerSpriteDesc, g_cDb->unk70, 12, g_JammerBufferPtr);
+    if (!D_80062D98) {
+        effect->Pos.vx += effect->unkC.vx;
+        effect->Pos.vy += effect->unkC.vy;
+        effect->Pos.vz += effect->unkC.vz;
+        effect->AnimationFrame++;
+        if (effect->AnimationFrame == g_JammerSpriteAnims[effect->unk14]->frameCount) {
+            effect->StartFrame = -1;
+        }
+    }
+}
+
+void JammerImpactModelTick(void) {
+    JammerData* effect;
+    MATRIX matrix;
+    MATRIX rotated;
+    s32 flag;
+    s16 i;
+
+    effect = &g_BattleEffectSlots[g_BattleEffectCursor];
+    for (i = 0; i < 3; i++) {
+        matrix.m[2][i] = 0;
+        matrix.m[1][i] = 0;
+        matrix.m[0][i] = 0;
+    }
+    SetRotMatrix(&g_BattleWorldView.m);
+    SetTransMatrix(&g_BattleWorldView.m);
+    RotTrans(&effect->Pos, (VECTOR*)matrix.t, &flag);
+    matrix.m[0][0] = matrix.m[1][1] = matrix.m[2][2] = effect->AnimationFrame * 600 + 0x800;
+    RotMatrixYXZ(&g_JammerRotation, &rotated);
+    MulMatrix(&matrix, &rotated);
+    SetRotMatrix(&matrix);
+    SetTransMatrix(&matrix);
+    SetFarColor(0, 0, 0);
+    g_JammerModelDesc.color = effect->AnimationFrame * 0x100;
+    g_JammerBufferPtr = func_800D29D4(&g_JammerModelDesc, g_cDb->unk70, 12, g_JammerBufferPtr);
+    if (!D_80062D98) {
+        effect->AnimationFrame++;
+        if (effect->AnimationFrame == 15) {
+            effect->StartFrame = -1;
+        }
+    }
+}
+
+void JammerRingSpriteTick(void) {
+    JammerData* effect;
+    MATRIX matrix;
+    MATRIX rotated;
+    SVECTOR rot;
+    s32 flag;
+    s16 shade;
+    s16 i;
+
+    effect = &g_BattleEffectSlots[g_BattleEffectCursor];
+    rot.vx = rot.vy = 0;
+    rot.vz = effect->AnimationFrame << 8;
+    for (i = 0; i < 3; i++) {
+        matrix.m[i][0] = matrix.m[i][1] = matrix.m[i][2] = 0;
+    }
+    SetRotMatrix(&g_BattleWorldView.m);
+    SetTransMatrix(&g_BattleWorldView.m);
+    RotTrans(&effect->Pos, (VECTOR*)matrix.t, &flag);
+    matrix.m[0][0] = matrix.m[1][1] = matrix.m[2][2] = 0x1400;
+    RotMatrixYXZ(&rot, &rotated);
+    MulMatrix(&matrix, &rotated);
+    SetRotMatrix(&matrix);
+    SetTransMatrix(&matrix);
+    shade = effect->AnimationFrame < 12 ? 8 : 0x14 - effect->AnimationFrame;
+    shade <<= 4;
+    g_JammerSpriteDesc2.frames = g_JammerSpriteAnims2[effect->unk14];
+    g_JammerSpriteDesc2.color.r = g_JammerSpriteDesc2.color.g = g_JammerSpriteDesc2.color.b = shade;
+    g_JammerBufferPtr = func_800D4D90(&g_JammerSpriteDesc2, g_cDb->unk70, 12, g_JammerBufferPtr);
+    if (!D_80062D98) {
+        effect->Pos.vx += effect->unkC.vx;
+        effect->Pos.vy += effect->unkC.vy;
+        effect->Pos.vz += effect->unkC.vz;
+        effect->AnimationFrame++;
+        if (effect->AnimationFrame == 0x14) {
+            effect->StartFrame = -1;
+        }
+    }
+}
+
+void JammerTargetTick(void) {
+    JammerData* effect;
+    JammerData* child;
+    SVECTOR vec;
+    SVECTOR rot;
+    MATRIX matrix;
+    s32 flag;
+    s16 ang;
+    s16 j;
+
+    effect = &g_BattleEffectSlots[g_BattleEffectCursor];
+    if (!D_80062D98) {
+        if (effect->AnimationFrame < 20) {
+            child = &g_BattleEffectSlots[BattleEffectRegister(JammerRingSpriteTick)];
+            child->Pos.vx = effect->Pos.vx;
+            child->Pos.vy = effect->Pos.vy;
+            child->Pos.vz = effect->Pos.vz;
+            child->unkC.vx = (effect->unkC.vx - effect->Pos.vx) / 15;
+            child->unkC.vy = (effect->unkC.vy - effect->Pos.vy) / 15;
+            child->unkC.vz = (effect->unkC.vz - effect->Pos.vz) / 15;
+            ang = rand() % 4096;
+            vec.vx = (u32)(rcos(ang) * 15) >> 10;
+            vec.vy = (u32)(rsin(ang) * 15) >> 10;
+            vec.vz = 0;
+            rot.vz = 0;
+            rot.vx = 0;
+            rot.vy = child->unk16 = ratan2(effect->unkC.vx - effect->Pos.vx, effect->unkC.vz - effect->Pos.vz);
+            RotMatrixYXZ(&rot, &matrix);
+            matrix.t[0] = child->unkC.vx;
+            matrix.t[1] = child->unkC.vy;
+            matrix.t[2] = child->unkC.vz;
+            SetRotMatrix(&matrix);
+            SetTransMatrix(&matrix);
+            RotTransSV(&vec, &child->unkC, &flag);
+            child->unk14 = rand() % 7;
+        }
+        if (effect->AnimationFrame == 24) {
+            child = &g_BattleEffectSlots[BattleEffectRegister(JammerImpactModelTick)];
+            child->Pos.vx = effect->unkC.vx;
+            child->Pos.vy = effect->unkC.vy;
+            child->Pos.vz = effect->unkC.vz;
+            func_800BBA84(0x189, effect->unk1C, 0);
+        }
+        if (effect->AnimationFrame >= 25 && effect->AnimationFrame < 36) {
+            for (j = 0; j < 2; j++) {
+                child = &g_BattleEffectSlots[BattleEffectRegister(JammerWaveSpriteTick)];
+                BattleGetPartPosition(effect->unk1C, g_BattleModels[effect->unk1C].boneIndices[0], &child->Pos);
+                child->Pos.vx += rand() % 1200 - 600;
+                child->Pos.vy += rand() % 1200 - 600;
+                child->Pos.vz += rand() % 1200 - 600;
+                child->unk14 = rand() % 3;
+                child->unk18 = (rand() % 3 << 11) + 0x1000;
+                ang = rand() % 4096;
+                vec.vx = (u32)(rcos(ang) * 15) >> 10;
+                vec.vy = (u32)(rsin(ang) * 15) >> 10;
+                vec.vz = 0;
+                rot.vz = 0;
+                rot.vx = 0;
+                rot.vy = rand() % 4096;
+                RotMatrixYXZ(&rot, &matrix);
+                matrix.t[0] = matrix.t[1] = matrix.t[2] = 0;
+                SetRotMatrix(&matrix);
+                SetTransMatrix(&matrix);
+                RotTransSV(&vec, &child->unkC, &flag);
+            }
+        }
+        if (effect->AnimationFrame == 30) {
+            func_800D5774(effect->unk1C);
+        }
+        effect->AnimationFrame++;
+        if (effect->AnimationFrame == 50) {
+            effect->StartFrame = -1;
+        }
+    }
+}
+
+void JammerTargetSetup(s32 target, s32 callbackArg) {
+    JammerData* effect;
+
+    effect = &g_BattleEffectSlots[BattleEffectRegister(JammerTargetTick)];
+    BattleGetPartPosition(callbackArg, g_BattleModels[callbackArg].boneIndices[9], &effect->Pos);
+    BattleGetPartPosition(target, g_BattleModels[target].boneIndices[0], &effect->unkC);
+    effect->unk1C = target;
+    effect->unk1E = callbackArg;
+    func_800BBA84(0x11E, callbackArg, 0);
+}
+
+void JammerStart(s32 targetMask, s32 callbackArg) {
+    BattleEffectRegister(JammerDoubleBufferFlip);
+    BattleSetLoadTimToVram(D_801B0BB0, 0, 0, 0);
+    MagicAnimationRegister(targetMask, callbackArg, 4, JammerTargetSetup);
+}
diff --git a/src/magic/jammer.h b/src/magic/jammer.h
new file mode 100644
index 00000000..01c818a2
--- /dev/null
+++ b/src/magic/jammer.h
@@ -0,0 +1,6 @@
+#ifndef JAMMER_H
+#define JAMMER_H
+
+#include "magic.h"
+
+#endif
diff --git a/tools/builder/builder/objdiff.go b/tools/builder/builder/objdiff.go
index 23967455..7281e732 100644
--- a/tools/builder/builder/objdiff.go
+++ b/tools/builder/builder/objdiff.go
@@ -113,6 +113,8 @@ var metaOverlays = map[string]metaOverlay{
 	"lv5deth":  {"lv5deth", "magic", "LV.5 Death"},
 	"choco0":   {"choco0", "magic", "choco0"},
 	"sennkoku": {"sennkoku", "magic", "Death Sentence / Roulette"},
+	"daionpa":  {"daionpa", "magic", "DAIONPA"},
+	"jammer":   {"jammer", "magic", "JAMMER"},
 }
 
 func makeObjdiffConfig(b BuildConfig) objdiffConfig {