In the world of Type-Moon, it all begins with becoming Morgan's husband!

This is the truth hidden within the fire.

You and Sakura Tohsaka know nothing about this.

However, this doesn't prevent you from speculating about what happened during that period—because there isn't actually a definitive answer.

Based on the information currently available—

"The Servant who should be defeating Caster should be Lancer."

Mr. Ghost's voice echoed in Sakura Tohsaka's ears.

"After all, she was the first Servant to arrive at the scene—it's only natural that she should be the one to carry out the extermination."

Hearing this, a hint of sadness appeared in Sakura Tohsaka's eyes.

Mr. Ghost noticed this, and then asked gently:

"Sakura, what's wrong?"

"It's nothing." Sakura Tohsaka's tone held a hint of worry.

"I just feel that even though Lancer was the first one to arrive at the scene... it seems like he didn't do anything to stop it."

"She seems completely indifferent to whether other people live or die."

"..."

Mr. Ghost realized that Sakura Tohsaka, even after growing up, was still as kind as she was when she was a child.

He thought for a moment before answering Sakura Tohsaka's question.

"Actually, we don't know whether it was stopped or not."

"After all, this happened ten years ago."

"but--"

"I think at least one thing is certain."

"Huh?" Hearing this, Sakura Tohsaka perked up a little.

"What's going on?"

"That means Lancer at least prevented the situation from escalating further—after all, that was the last arson attack, wasn't it?"

"From this perspective, she may not have done nothing, but rather encountered some situations that we could not have imagined."

“But that’s normal,” Mr. Ghost continued to explain.

"after all--"

"A Caster capable of causing such a disaster must be quite troublesome, right?"

You don't know if your guess is accurate.

However, there is one thing you can be 100% certain of.

That is, Caster in the Fourth Holy Grail War is a rather formidable opponent.

Each Servant in the Holy Grail War has a unique class.

For example, Scáthach is a lancer;

Artoria, on the other hand, is Saber.

Different class ranks determine that each Servant has a different fighting style.

As a Caster, Mephisto was naturally not excluded.

but--

He also possesses extremely unique characteristics.

Based on class, a typical Caster, due to insufficient combat attributes, often resorts to building a magic workshop to win.

But Mephisto is completely different from these traditional Casters.

As an artificial life form created by Faust, he was not good at building any magic workshops.

As a substitute, Mephisto's ability is to create a magical space called a "laboratory".

This is a product that can be constructed much faster than the Magic Workshop, but its range and effects are therefore quite limited.

of course.

The term "laboratory" is already a euphemistic way of referring to it.

Its actual function is more like a prison created by individuals.

Mephisto himself held the "key" to unlocking these prisons.

No one can leave these places without his permission.

The photos of the victims struggling in the fire that Ryunosuke Uryu had previously obtained were produced in these "laboratories".

千;寻,!免."费:.小?说,,裙?2'5'5"!5'!9?5'3!0':0. ,'千'.寻.:小!说.!中!!转;裙'5""5?:4,,7':0':7.:5!?5:?5梅菲斯托将他们称之为试作。

He himself knew that setting up a "laboratory" in such a blatant manner would absolutely not be overlooked by the other Servants.

and so--

In order to ensure that the process of creating my work is not affected.

When Mephisto committed his seventh arson attack, he began to painstakingly set up a more sophisticated "laboratory".

He was indeed the target of the church's attack and prey in the eyes of other Servants.

But conversely—

He is also a hunter, waiting in ambush for Servants who come to him because of "Command Seals".

The one who moved the fastest was Scáthach, who was standing right in front of us.

"Lancer—!"

Mephisto stared wide-eyed, making it look as if it might bulge out at any moment.

Amidst the raging flames, he raised his hands high, his movements and expression resembling those of someone participating in some extremely sacred opening ceremony.

The towering flames from the window behind him were like a stimulant to this demon.

His voice rose even higher: "Welcome to the laboratory's first guest!"

however--

Scáthach remained unmoved by Mephisto's almost manic performance.

On the contrary, she became even calmer at this moment, and even quickly analyzed the current situation.

Magic concentration will never increase for no reason.

If it changes, it means that something has definitely been done to the area under your feet.

Considering that the Servant before me is Caster, it's likely that I've entered a magic workshop that the other party has set up.

This is tantamount to an invasion of his territory, and it would not be surprising no matter what happens.

Scáthach was not imagining things.

She is the queen and gatekeeper of the Land of Shadows.

In addition to being able to perfectly control every Gae Bolg Alternative, she, who is like a genius, actually has a considerable amount of magical knowledge.

In a sense, Scáthach could even respond to Kenneth's call as Caster.

Of course, she had no need to do that, nor would she deign to do so.

The Queen of the Land of Shadows doesn't currently believe anyone is worthy to be her Master.

"so--"

Scáthach, who had seen through everything, looked at Ryunosuke Uryu beside Mephisto.

"You actually placed something so dangerous right under your Master's feet?"

"Aren't you... afraid he'll die because of this?"

"..."

Upon hearing this, Ryunosuke Uryuu, who was also engulfed in flames, realized that his servant Mephisto seemed to have done something terrible behind his back.

He angrily demanded, "Caster, what have you done?!"

Despite being questioned by his Master, Mephisto remained calm.

He took off his hat and bowed to the other person.

"Master."

"I originally intended to tell you the truth only after the masterpiece was completed."

"That's right, I did set the stage for the performance right under your feet."

"but--"

Mephisto's expression turned extremely pleased.

"All of this is so that you can be at the center of the stage, witnessing the most dazzling death!"

"Master, let's think about it!"

"As the ground beneath our feet explodes... everything nearby will be engulfed in flames."

“Countless people are wailing and screaming in pain around us, but no one has any way to leave this place that causes them so much suffering.”

"Isn't this the most perfect work?"

"..."

Upon hearing Mephisto's description, Ryunosuke Uryu felt his breathing quicken considerably.

"I see! I see!!!"

"That's right, absolutely right!"

"Caster, well done!"

Ryunosuke Uryu, who is obsessed with death, has completely disregarded his own situation.