diff --git a/th01/main/boss/b15j.cpp b/th01/main/boss/b15j.cpp
index 129e36d0..9e46e270 100644
--- a/th01/main/boss/b15j.cpp
+++ b/th01/main/boss/b15j.cpp
@@ -679,6 +679,22 @@ void near pattern_souls_drop_tears_and_move_diagonally(void)
 	); \
 }
 
+inline void fire_random_aimed_eye_laser(
+	int i,
+	screen_x_t origin_left,
+	pixel_t aim_range_x,
+	const int &speed_multiplied_by_8,
+	pixel_t w
+) {
+	fire_aimed_eye_laser(
+		i,
+		origin_left,
+		((rand() % (aim_range_x * 2)) - aim_range_x),
+		speed_multiplied_by_8,
+		w
+	);
+}
+
 void near pattern_two_crossed_eye_lasers(void)
 {
 	// Yup, first firing on [boss_phase_frame] 400.
@@ -761,3 +777,61 @@ int near pattern_4_spiral_along_disc(void)
 
 	#undef angle
 }
+
+int near pattern_single_lasers_from_left_eye(void)
+{
+	enum {
+		ORIGIN_X = EYE_LEFT_CENTER_X,
+		LASER_W = 4,
+
+		// Should *technically* subtract (LASER_W / 2), as seen in
+		// pattern_two_crossed_eye_lasers().
+		RANGE_X = ((PLAYFIELD_W / 10) - LASER_W),
+	};
+
+	if(boss_phase_frame <= 200) { // (redundant)
+		return 1;
+	}
+	if(boss_phase_frame == 250) {
+		select_for_rank(pattern_state.speed_multiplied_by_8,
+			(to_sp(6.5f) / 2),
+			(to_sp(7.0f) / 2),
+			(to_sp(7.5f) / 2),
+			(to_sp(8.0f) / 2)
+		);
+		mdrv2_se_play(6);
+		fire_random_aimed_eye_laser(
+			0, ORIGIN_X, RANGE_X, pattern_state.speed_multiplied_by_8, LASER_W
+		);
+	} else if(boss_phase_frame == 280) {
+		mdrv2_se_play(6);
+		fire_random_aimed_eye_laser(
+			1, ORIGIN_X, RANGE_X, pattern_state.speed_multiplied_by_8, LASER_W
+		);
+	} else if(boss_phase_frame == 310) {
+		mdrv2_se_play(6);
+		fire_random_aimed_eye_laser(
+			2, ORIGIN_X, RANGE_X, pattern_state.speed_multiplied_by_8, LASER_W
+		);
+	} else if(boss_phase_frame == 340) {
+		mdrv2_se_play(6);
+		fire_random_aimed_eye_laser(
+			3, ORIGIN_X, RANGE_X, pattern_state.speed_multiplied_by_8, LASER_W
+		);
+	} else if(boss_phase_frame == 370) {
+		mdrv2_se_play(6);
+		fire_random_aimed_eye_laser(
+			4, ORIGIN_X, RANGE_X, pattern_state.speed_multiplied_by_8, LASER_W
+		);
+	} else if(boss_phase_frame == 400) {
+		mdrv2_se_play(6);
+		fire_random_aimed_eye_laser(
+			5, ORIGIN_X, RANGE_X, pattern_state.speed_multiplied_by_8, LASER_W
+		);
+	}
+	if(boss_phase_frame > 500) {
+		boss_phase_frame = 0;
+		return 2;
+	}
+	return 1;
+}
diff --git a/th01_reiiden.asm b/th01_reiiden.asm
index 7db8c9bf..13cf16bb 100644
--- a/th01_reiiden.asm
+++ b/th01_reiiden.asm
@@ -14716,6 +14716,7 @@ main_34_TEXT	segment	byte public 'CODE' use16
 	@pattern_two_crossed_eye_lasers$qv procdesc near
 	@pattern_souls_single_aimed_pelle$qv procdesc near
 	@pattern_4_spiral_along_disc$qv procdesc near
+	@pattern_single_lasers_from_left_$qv procdesc near
 main_34_TEXT	ends
 
 main_34__TEXT	segment	byte public 'CODE' use16
@@ -14723,171 +14724,6 @@ main_34__TEXT	segment	byte public 'CODE' use16
 		;org 4
 		assume es:nothing, ss:nothing, ds:_DATA, fs:nothing, gs:nothing
 
-; =============== S U B	R O U T	I N E =======================================
-
-; Attributes: bp-based frame
-
-sub_24316	proc near
-		push	bp
-		mov	bp, sp
-		cmp	_boss_phase_frame, 200
-		jle	loc_244C9
-		cmp	_boss_phase_frame, 250
-		jnz	short loc_24378
-		call	@kikuri_select_for_rank$qmiiiii stdcall, offset _kikuri_pattern_state, ds, large 34h or (38h shl 16), large 3Ch or (40h shl 16)
-		push	6
-		call	_mdrv2_se_play
-		add	sp, 0Eh
-		push	20 or (4 shl 16)	; (moveout_at_age) or (w shl 16)
-		push	10	; col
-		push	_kikuri_pattern_state	; speed_multiplied_by_8
-		push	PLAYFIELD_BOTTOM	; target_y
-		call	IRand
-		mov	bx, 120
-		cwd
-		idiv	bx
-		add	dx, _player_left
-		add	dx, -60
-		push	dx	; target_left
-		push	307 or (147 shl 16)	; (origin_left) or (origin_y shl 16)
-		push	ds	; this (segment)
-		push	offset shootout_laser_0	; this (offset)
-		jmp	loc_244AE
-; ---------------------------------------------------------------------------
-
-loc_24378:
-		cmp	_boss_phase_frame, 280
-		jnz	short loc_243B7
-		push	6
-		call	_mdrv2_se_play
-		pop	cx
-		push	20 or (4 shl 16)	; (moveout_at_age) or (w shl 16)
-		push	10	; col
-		push	_kikuri_pattern_state	; speed_multiplied_by_8
-		push	PLAYFIELD_BOTTOM	; target_y
-		call	IRand
-		mov	bx, 120
-		cwd
-		idiv	bx
-		add	dx, _player_left
-		add	dx, -60
-		push	dx	; target_left
-		push	307 or (147 shl 16)	; (origin_left) or (origin_y shl 16)
-		push	ds	; this (segment)
-		push	offset shootout_laser_1	; this (offset)
-		jmp	loc_244AE
-; ---------------------------------------------------------------------------
-
-loc_243B7:
-		cmp	_boss_phase_frame, 310
-		jnz	short loc_243F6
-		push	6
-		call	_mdrv2_se_play
-		pop	cx
-		push	20 or (4 shl 16)	; (moveout_at_age) or (w shl 16)
-		push	10	; col
-		push	_kikuri_pattern_state	; speed_multiplied_by_8
-		push	PLAYFIELD_BOTTOM	; target_y
-		call	IRand
-		mov	bx, 120
-		cwd
-		idiv	bx
-		add	dx, _player_left
-		add	dx, -60
-		push	dx	; target_left
-		push	307 or (147 shl 16)	; (origin_left) or (origin_y shl 16)
-		push	ds	; this (segment)
-		push	offset shootout_laser_2	; this (offset)
-		jmp	loc_244AE
-; ---------------------------------------------------------------------------
-
-loc_243F6:
-		cmp	_boss_phase_frame, 340
-		jnz	short loc_24434
-		push	6
-		call	_mdrv2_se_play
-		pop	cx
-		push	20 or (4 shl 16)	; (moveout_at_age) or (w shl 16)
-		push	10	; col
-		push	_kikuri_pattern_state	; speed_multiplied_by_8
-		push	PLAYFIELD_BOTTOM	; target_y
-		call	IRand
-		mov	bx, 120
-		cwd
-		idiv	bx
-		add	dx, _player_left
-		add	dx, -60
-		push	dx	; target_left
-		push	307 or (147 shl 16)	; (origin_left) or (origin_y shl 16)
-		push	ds	; this (segment)
-		push	offset shootout_laser_3	; this (offset)
-		jmp	short loc_244AE
-; ---------------------------------------------------------------------------
-
-loc_24434:
-		cmp	_boss_phase_frame, 370
-		jnz	short loc_24472
-		push	6
-		call	_mdrv2_se_play
-		pop	cx
-		push	20 or (4 shl 16)	; (moveout_at_age) or (w shl 16)
-		push	10	; col
-		push	_kikuri_pattern_state	; speed_multiplied_by_8
-		push	PLAYFIELD_BOTTOM	; target_y
-		call	IRand
-		mov	bx, 120
-		cwd
-		idiv	bx
-		add	dx, _player_left
-		add	dx, -60
-		push	dx	; target_left
-		push	307 or (147 shl 16)	; (origin_left) or (origin_y shl 16)
-		push	ds	; this (segment)
-		push	offset shootout_laser_4	; this (offset)
-		jmp	short loc_244AE
-; ---------------------------------------------------------------------------
-
-loc_24472:
-		cmp	_boss_phase_frame, 400
-		jnz	short loc_244B6
-		push	6
-		call	_mdrv2_se_play
-		pop	cx
-		push	20 or (4 shl 16)	; (moveout_at_age) or (w shl 16)
-		push	10	; col
-		push	_kikuri_pattern_state	; speed_multiplied_by_8
-		push	PLAYFIELD_BOTTOM	; target_y
-		call	IRand
-		mov	bx, 120
-		cwd
-		idiv	bx
-		add	dx, _player_left
-		add	dx, -60
-		push	dx	; target_left
-		push	307 or (147 shl 16)	; (origin_left) or (origin_y shl 16)
-		push	ds	; this (segment)
-		push	offset shootout_laser_5	; this (offset)
-
-loc_244AE:
-		call	@CShootoutLaser@spawn$qiiiiiiii
-		add	sp, 14h
-
-loc_244B6:
-		cmp	_boss_phase_frame, 500
-		jle	short loc_244C9
-		mov	_boss_phase_frame, 0
-		mov	ax, 2
-		pop	bp
-		retn
-; ---------------------------------------------------------------------------
-
-loc_244C9:
-		mov	ax, 1
-		pop	bp
-		retn
-sub_24316	endp
-
-
 ; =============== S U B	R O U T	I N E =======================================
 
 ; Attributes: bp-based frame
@@ -15669,7 +15505,7 @@ loc_24CFA:
 loc_24D1C:
 		cmp	word_35D14, 1
 		jnz	short loc_24D28
-		call	sub_24316
+		call	@pattern_single_lasers_from_left_$qv
 		jmp	short loc_24D3E
 ; ---------------------------------------------------------------------------