Singularity F covered only a small area, existing on the foundation of Fuyuki City, the site of the Holy Grail War ritual.
Yet it was the cornerstone Marisbury used, with Chaldeas at its core, to advance the plan to bleach the Earth.
Unremarkable on the surface, but crucial.
And so, if they wanted to turn around and destroy the re-editing of human history carried out in the name of preserving human history, they first had to seize Singularity F itself.
That made the four leyline points within Fuyuki especially important.
Even in a Holy Grail War, no Servant or Magus would ever think of completely taking control of all four leyline points in order to carry out some insane plan.
This was the plan Shiomi and Morgan had refined after making contact with Mooncell.
They would strip Singularity F away from Chaldeas, then use it in reverse to eat away at the re-editing of human history until it was finally destroyed.
Like a row of dominoes, once the first one fell, the rest would collapse on their own.
Whether those four leyline points in Singularity F could unleash their full effect depended on the strength of the one executing it.
That was why Shiomi, using the authority of the united god, had created four crystalized fragments of power to serve as the foundation stones of the ritual.
"Scáthach and the others are already in position one after another. They're protecting their respective locations now."
As they moved through the underground cavern leading to the Great Hollow, Morgan confirmed the situation.
"They're all fast." Shiomi smiled. "Once the ritual begins, have Master and the others return to Storm Border. By then, all of Fuyuki will turn into a hollow."
The united god had to maintain the entire ritual while also protecting Storm Border.
And during that process, they would also have to face Chaldeas's counterattack.
Keeping everyone together was the safest approach.
"Wait."
Suddenly, Morgan called out to Shiomi.
"…I see it." Shiomi nodded, quickly moving closer to Morgan, his expression aligning with hers.
Beneath the Great Hollow, atop the platform where the core of the Greater Grail had once stood, there was a figure.
It was none other than Marisbury.
"There is no longer any need for us to speak with you," Morgan said coldly as she rose into the air until she stood at the same height as Marisbury. "At this point, there is no reason to keep wearing that man's appearance."
"Chaldeas is a replica born from the assumption that the Earth possesses a soul, the celestial sphere for safeguarding human history."
Marisbury stood there as he spoke.
"It does not possess the ability to communicate with the outside world on its own. All information can only be analyzed by the Near-Future Observation Lens Sheba before being presented to the people of Chaldea."
"The one before us is nothing more than a terminal of Chaldeas," Morgan said. "There is no longer any need for us to speak with Chaldeas. Since Chaldeas refuses to stop, then we will erase everything from the beginning and return time to January 1, 2018."
"I understand." Marisbury smiled broadly and spread his arms. "Singularity F is the cornerstone of the entire plan. It does not matter how you managed to reach this place. For Chaldeas, it is enough to stop you before the plan is completed."
The flow of wind within the Great Hollow began to change.
One Servant after another manifested from the void, their Spirit Origins taking shape.
The record bands of boundaries engraved onto human history had been completely stripped of free will and manifested as weapons for battle.
That was Chaldeas's power.
Singularity F existed upon Chaldeas itself. For Storm Border to force its way in here was no different from charging straight into the enemy's stronghold.
"On December 31, 2016, the Chaldea observatory, acting as a vessel, came into contact with the King of Magecraft's Temple of Time and launched the final battle over the Incineration of Humanity. On that day, countless Heroic Spirits responded to your will and appeared within the Temple of Time as a meteor shower from the highest heavens."
Marisbury recounted the fact in a calm, even tone.
The reason was simple.
At that time, the enemies of the Demon God King Goetia and the Seventy-Two Demon God Pillars were the Heroic Spirits who had manifested to protect human history.
Then and there, just like here and now.
The only difference was that the side standing against those countless Heroic Spirits had changed slightly.
"You mean to say that you summoned that meteor shower from the highest heavens just to erase us?" Morgan's gaze swept across the overwhelming mass of Servants. "They are nothing but puppets bearing Servant Spirit Origins. Chaldeas knows perfectly well what would happen if they regained free will."
Before she had even finished speaking, a poisoned arrow came flying straight at her.
Morgan caught it in her hand.
"Robin Hood's poisoned arrow," Shiomi said. "If you want to ambush us, that level is nowhere near enough."
Morgan casually tossed the arrow aside.
Marisbury lowered his head as well. There was no emotion on that face. He was not looking at where the arrow had fallen.
He was simply confirming something.
Confirming the fact that his body had been severed.
Without even the time for a single blink, Morgan had already cut apart the fake Marisbury fabricated by Chaldeas.
Still, no blood flowed.
Inside the severed body, there was only empty darkness and a hollow void.
An empty puppet shell.
"Human methods cannot kill a terminal. At most, they can only destroy its language function," Marisbury said. "Even gods are swayed by emotion and carry out meaningless actions. In terms of efficiency, you should learn from the Greek Machine Gods."
Just as Marisbury said, using the opening strike to bisect a terminal with no boundary between life and death had been an unnecessary move.
At the same time Morgan, as the united god, made her move, the shadows of Servants packed together like mountains and seas launched their encirclement.
Swords, spears, blades, and halberds, countless Noble Phantasms that existed as weapons, became deadly killing implements in the hands of their wielders. They wove together into an inescapable net and descended upon the united god all at once.
A formation worthy of being called certain death.
Morgan tilted her head slightly and glanced at the flashing blades behind her from the corner of her eye.
All of those weapons stopped at a fixed point, unable to move even half a step farther. Their wielders were stopped outside along with them.
An absolutely impenetrable domain.
The realm of a god.
The conceptual defense that belonged to the united god alone.
And that impenetrable domain was still expanding, knocking away the Servants that kept descending and carving out an empty stretch of ground atop the platform at the center of the Great Hollow.
Ordinary attacks would never work.
More and more magical energy began to swell.
Even stripped of free will, the Servants could still use their Noble Phantasms.
With such an overwhelming number of Noble Phantasms before them, even the united god found it somewhat troublesome.
So simply standing there and taking the blows was not an option. They had to wipe out the enemy before them in one sweep.
[Earth Mother's Feast.]
Facing the hundreds upon hundreds of Servants below the Great Hollow, Morgan opened her right hand.
In an instant, a power capable of overturning heaven and earth filled the entire space beneath the Great Hollow.