FGO System in the Type-Moon World

Where exactly were Kotomine Kirei and Gilgamesh hiding?

Honestly, the answer was obvious.

With Reiji Souma's scouting ability, he quickly confirmed his suspicions.

——The Shinto Assembly Hall.

In the Fifth Holy Grail War, Kotomine Kirei descended with the Lesser Grail in this very place.

So, it wasn't surprising that this was where they had set up their base.

"Barring the Masses…"

Zhuge Liang cast a boundary spell, driving away civilians.

Then, he immediately activated his Territory Creation.

"Stone Sentinel Maze——"

Thick mist instantly spread throughout the Shinto Assembly Hall.

Once again, Kotomine Kirei experienced a familiar phenomenon.

It was as if the entire building had been isolated from the world itself.

The air was filled with a dense fog, and all surroundings vanished.

Then—

Eight massive stone pillars descended from the sky, forming a battlefield of absolute control.

Tamamo-no-Mae, too, raised her sacred mirror, activating her Noble Phantasm.

"O gods of Izumo!

Let this be the proof of your purity, as this mirror becomes your sacred treasure...

Eightfold Blessing of Amaterasu!

Or... You know, something like that☆——"

For the first time, she fully announced its true name.

With mana consumption now reduced to zero, a battlefield tailor-made for Gilgamesh's defeat had been set.

Zhuge Liang and Tamamo took their positions on higher ground, hidden within the mist of the Stone Sentinel Maze.

Meanwhile, Souma, alongside Artoria and the Black Dog, stood before the doors of the Shinto Assembly Hall.

"O Ancient King, Will You Cower?"

Souma smirked.

"O King of Heroes, the stage is set."

"Or do you intend to hide away like a coward in that tiny hall?"

His voice echoed through the silence.

And then—

BOOM!

The doors of the Assembly Hall burst open.

Though Kotomine Kirei was nowhere to be seen, Gilgamesh slowly stepped out.

"Hmph. So, in the end, it's you who stands before me."

His golden gaze swept over Souma, then over Artoria.

"I see. You've even tamed Saber."

"Hahaha… I suppose this is somewhat amusing."

Standing before the Assembly Hall, Gilgamesh radiated the presence of an entire army—all by himself.

"However…"

Gilgamesh's lips curled into a sneer.

"Do you truly believe this grants you the right to stand before me?"

"Very well."

"Since you've earned this moment, I shall grant you the privilege of witnessing true power."

Slowly, Gilgamesh raised his hand.

A golden key appeared.

He pressed it into the air itself.

Clang.

A hilt emerged from the void.

And then—

A monstrous, drill-like blade—so unlike any sword—manifested in his grasp.

Gilgamesh pressed one hand against his face, his one visible eye glowing blood-red.

"Enuma Elish——"

With a roar, he raised his sword high—

—And brought it down.

The Ultimate Attack

For a moment—

It was as if space itself let out a cry of agony.

The invisible slash tore through the very fabric of the world.

Then—

The sky shattered.

From the cracks in reality, a crimson, otherworldly force erupted forth, swallowing everything in its path.

It surged forward—

A tidal wave of destruction.

The Blade That Tore Creation Asunder.

Gilgamesh's ultimate attack was unleashed.

As the attack roared toward them—

Souma merely raised a hand, holding back both Artoria and the Black Dog.

Then, with a calm voice, he whispered—

"Avalon."