Einzbern Castle is not far from Mount Enzou.
The straight-line distance is approximately four kilometers.
After passing through the forest, walk through a section of ruins and you'll arrive.
But less than five minutes after the group left the castle, a huge tremor came from the southwest.
The ground was shaking.
The tree trunk was swaying.
Leaves rustled down from above.
What's that noise?
Ritsuka Fujimaru grabbed onto a nearby tree trunk to steady herself.
Dr. Roman's communication system was filled with the rapid scrolling of data.
"A massive magical collision has occurred in the southwest! Two sources!"
"One is Medusa, who used to chase you! The other... is an unknown, high-intensity Spirit Origin reaction!"
"They're Servant from the Mount Enzou region!"
Cú Chulainn, carrying his staff, looked southwest with his red eyes.
"They started fighting."
The tremors lasted for about ten minutes.
During this time, a dark red light could be seen flickering on the distant horizon.
Something is flying through the air.
A tremendous roar came from afar, passing through ruins and forests, and by the time it reached them, it had turned into a low hum.
Then everything went quiet.
The silence came suddenly.
It sounded like someone had pressed the mute button.
The battle is over.
Roman's voice softened considerably.
"Who's winning?"
Olga Marie asked.
"... Uncertain. But Medusa's Spirit Origin reaction has completely disappeared."
"Disappeared?"
"And it vanished completely. Not even a trace of magic remained."
Roman's voice was filled with confusion.
"It felt like I was swallowed whole by something."
The group looked at each other.
Cú Chulainn's expression became subtle.
"Swallow it?"
He muttered something.
Beneath Olga Marie's long silver hair, a hint of worry flashed in her eyes.
"If Medusa loses... then the guards of Mount Enzou are stronger than we anticipated."
"Director."
Mash gripped her shield tightly.
Should we go again?
Olga Marie looked at Illya.
Illya stood in the middle of the group, her long silver hair hanging down her back.
Her complexion had regained most of its color, and her wine-red eyes were bright.
Heracles's Spirit Origin is within her.
This is their biggest trump card right now.
"Go."
Olga Marie said.
"No matter what, the Holy Grail is there. This Singularity will never be fixed unless we go there."
The group continued on their way.
After crossing the edge of the forest, we re-entered the ruins area.
It's about two kilometers from here to Mount Enzou.
Along the way, they saw traces of the battle.
There were huge claw marks on the ground.
Each claw mark was over ten meters wide.
The ruins were crushed into flat ground, and in some places they were even pressed into a hard, vitrified surface.
A lingering smell of burning remained in the air.
But what's most unsettling is that there isn't a single monster.
The magical beasts that used to accompany Medusa.
Cerberus, Nemean Lion, Caucasian Eagle, Nine-Headed Serpent Hydra.
Not a single one can be seen.
It's as if they never existed.
Ritsuka Fujimaru's face was somewhat pale.
Each of those magical beasts possessed the strength of Servant.
But now they have all been wiped out.
" Dr. Roman."
Olga Marie's voice was very low.
"Has there been any change in the Spirit Origin reaction of the guardians of Mount Enzou?"
"Have."
Roman's voice was somewhat unstable.
"It's stronger than before."
silence.
"Furthermore, the wavelength pattern of the Spirit Origin reaction has changed. It's completely different from before, as if it has undergone some kind of growth or evolution."
The group slowed their pace.
We walked for about ten more minutes.
The location of Mount Enzou came into view.
Or rather, the huge crater came into view.
A massive, semi-circular crater was exposed against the dark red sky, its walls made of bare rock.
The rubble around the pit has been cleared away.
It looked like it had been flattened by something enormous passing by.
The group approached the edge of the large pit.
When there were still about 100 meters left.
Mash's sixth sense immediately issued a warning.
She raised the shield in front of her.
A black arc shot over from a distant high point.
Extremely fast.
Mash instinctively aligned the shield with that arc.
The arrows that were shot were not ordinary ones.
It is a sword.
The instant it touched the shield.
The sword shattered.
Broken Phantasm.
The projected Noble Phantasm replica detonates all of its magical power the moment it makes contact with the target, compressing the concept of a Noble Phantasm into a one-time explosion.
The explosion erupted from the shield.
The shockwave pushed Mash back three steps.
"Ugh...!"
Mash gritted her teeth and held on.
"What is that?!"
Ritsuka Fujimaru squatted down.
Cú Chulainn's red eyes swept in the direction from which the arrows had come.
The rooftop of a partially collapsed building.
There was a figure standing there.
Short white hair.
Red coat.
He held a black longbow in his hand.
Shirou Emiya.
Cú Chulainn recognized the other person.
"That archer."
The Runes on his staff lit up.
A second arrow was shot.
This time it's a Projection Noble Phantasm in the form of a longsword.
Mash blocked it again.
The explosion was still violent, but weaker than the first one.
It's like they deliberately reduced their strength.
Mash was just about to assume a defensive stance to prepare for the third attack.
There was no third strike.
Shirou Emiya put away his bow.
He stood atop the building, his short white hair swaying gently in the wind.
His amber eyes fixed on a particular spot in the group.
Illya.
With long silver hair and wine-red eyes, her small figure stood behind Ritsuka Fujimaru.
Shirou Emiya looked at her for about two seconds.
Then he turned around.
He jumped off the building and disappeared on the other side of the ruins.
No further attack was launched.
"He's gone?"
Ritsuka Fujimaru stood up from her squatting position.
"... They let us in."
Cú Chulainn's red eyes narrowed slightly.
"Why?"
"I don't know. But don't waste the opportunity. Let's go."
The group quickly passed through the area where they had just been targeted by snipers.
Upon reaching the edge of the pit, walk down the sloping surface of the pit wall covered with loose rocks.
The bottom of the pit was more spacious than they had imagined.
Exposed rock strata and gravel ground.
In the center is the altar, with a golden Holy Grail suspended above it.
Apart from that, there was only one other thing in the entire pit.
A shed.
Two low walls made of rubble, with an advertising banner stretched across them as a roof.
The advertising banner was printed with the logo of a no-longer-existing electronics chain store; because it had been scorched by fire, only half of the logo remained.
There was a single mattress inside the shed.
One corner of the mattress was charred.
There were more than a dozen empty cans piled up next to the mattress.
Two empty mineral water bottles lay overturned in the corner.
The Chaldea group looked at the shed.
There was a five-second silence.
"... What's this?"
Olga Marie spoke first.
"Could this be the... abode of that terrifying being, nearly at the level of the Beast?"
Cú Chulainn added a sentence.
"Wait, wait, wait."
Ritsuka Fujimaru took two steps closer, looking at the pile of empty cans and the charred mattress.
"The powerful Servant who guards the Greater Grail lives in this... this..."
"In a dilapidated shed."
Cú Chulainn finished speaking for her.
"Yes. A run-down shed."
Mash glanced at it too.
"Look, there's a hole in the corner of that advertising banner."
Illya pointed.
"Won't water leak in if it rains?"
"It doesn't rain at this Singularity."
Cú Chulainn said.
The crowd stared at the appallingly shabby shed for about ten seconds, and the tense atmosphere inexplicably eased considerably.
Then a noise came from inside the shed.
A corner of the advertising banner was lifted.
A person walked out of the shed.
A young girl.
Her light golden hair was draped over her shoulders, slightly disheveled, as if she had just woken up.
Her rose-red eyes were half-open, carrying a dazed feeling of not being fully awake.
She was dressed in black Astral Dress with dark red stripes.
Two pairs of jet-black wings spread out from behind, with a dark red shimmer flowing on their feathers.
A red and black halo hung above his head, engraved with strange symbols.
She looks about the same age as Ritsuka Fujimaru.
She looked about fifteen or sixteen years old.
But the moment she stepped forward...
The air has changed.
An oppressive aura emanated from her, like an invisible wall pushing towards everyone.
This was not released intentionally.
It's uncontrollable.
Leviathan has just completed its evolution, devouring a large number of magical beasts and a Servant with an additional Holy Grail in a short period of time, causing its Spirit Origin size to increase dramatically.
The aftershocks of this power were transmitted to Mayuri through the contract connection.
Mayuri herself had no intention of suppressing the others.
However, Leviathan's power cannot be completely dispelled in a short period of time.
Ritsuka Fujimaru's legs went weak.
Mash's shield automatically rose in front of her.
Olga Marie's face paled a shade.
The tip of Cú Chulainn's staff lit up.
Only Illya didn't react much.
Heracles's Spirit Origin within her provided an instinctive resilience.
Mayuri looked at the people in front of her.
Her magenta eyes slowly focused.
She recognized these people.
Now they've come to us themselves.
"The last Master of humanity, Ritsuka Fujimaru."
Mayuri spoke up.
"This is not where you should be. Go back."
The Chaldea members exchanged bewildered glances.
This was completely different from what they had expected.
They assumed that the enemy Servant guarding the Holy Grail would be a ruthless war machine, ready to fight at the first sight of them and unleash a Noble Phantasm without a word.
The other person crawled out of a dilapidated shed, his hair disheveled, and he looked like he hadn't woken up yet.
Then they were politely asked to go back.
What's going on?