Takeru stepped forward once.
And vanished.
The attacker's eyes widened instantly.
Too late.
Takeru was already in front of him.
One hand lowered.
One fist pulled back.
No emotion on his face.
Only silence.
Then—
the narrator spoke.
"Black Flash:"
"The Timing: The cursed energy must connect exactly within a microsecond of the physical hit—a window of time so tiny it is impossible to perform consciously."
The attacker tried moving.
Too slow.
"The Multiplier: Unlike a normal attack, a Black Flash doesn't just add a percentage of damage; it raises the base power to the power of 2.5. This means even a standard punch is amplified into a devastating critical hit."
Takeru's fist moved.
Not fast.
Perfect.
The air bent around the strike itself.
"The 'Zone': Landing a Black Flash allows the user to enter an intense flow state. It heightens their senses and allows them to operate at 120% of their maximum potential."
The attacker finally raised his arms to guard.
Too late.
"When a hit occurs at an angle, the total force is divided into directional components. To find the effective force in a specific direction, you multiply the maximum impact force by the cosine or sine of the angle."
Takeru slightly adjusted the angle of his fist.
Only by a fraction.
But that fraction changed everything.
"For a 45 degree angle, this multiplier is cos,45 degrees, estimated to 0.707."
Black lightning sparked.
But—
something else mixed into it.
Gold.
The beach shook.
The ocean split outward from pressure alone.
The attacker's eyes widened completely.
Because instinct finally screamed one thing:
Death.
"When slanted to perpendicularly accurate angles it can multiply up to ten times, but when exerted with enough force it can be turned into a fifty degree outputted exertion rate, effectively making Takeru can make a golden—or other colored—Black Flash."
Then—
impact.
BLACK FLASH.
No.
GOLDEN BLACK FLASH.
The world cracked.
The attacker disappeared.
Not launched.
Not blasted away.
Gone.
The shockwave tore across the island.
Clouds split apart.
The ocean erupted upward.
The beach shattered beneath Takeru's feet.
And for the first time since the fight began—
everyone was speechless.
Yuji stared with shaking eyes.
"…What…"
Megumi couldn't even speak.
Gojo slowly smiled.
Not joking.
Not playful.
Proud.
Sukuna grinned wider.
"…Magnificent."
Black and gold lightning slowly faded around Takeru's arm.
And Takeru?
Still emotionless.
Still silent.
Looking forward—
at the second attacker.