The Imperio was one of the three Unforgivable Curses Chen Yu obtained at the beginning.

After being afflicted by the curse, Matou Kariya felt his mind go blank, his soul seemingly floating on clouds, and an overwhelming sense of happiness and pleasure surged through him, all thoughts and sense of responsibility vanishing.

Ever since he decided to pull Sakura out of the Matou Family's mire, and after Crest Worms were implanted in his body, not a single day passed without him enduring pain.

Now, Matou Kariya no longer had to suffer physical pain; he had never felt so relaxed, looking at Chen Yu with a silly, happy grin.

After confirming that Matou Kariya was under the control of his Imperio, Chen Yu nodded in satisfaction.

"Darling, have you found the person you were looking for?"

Nyarlathotep emerged from the darkness, still scrutinizing the foolish-looking Matou Kariya with curious eyes, then a hint of disdain appeared in her gaze.

"Darling, this person is a bit ugly."

Hearing Nyarlathotep's voice, Chen Yu turned and asked her.

"Nyarlathotep, why are you here so quickly?"

"The Servant meeting was boring. After the flashy Archer left, Berserker went berserk again and attacked Saber, but I stopped him."

"Then Lancer's Master ordered Lancer to attack Saber, and Rider said that if Lancer's Master took advantage of the situation to attack Saber, he would ally with Saber to deal with Lancer first."

"So, under mutual restraint, everyone lost interest in fighting. I saw there was no more fun to be had, so I naturally came back."

Nyarlathotep approached, her eyes still filled with disdain as she looked at Matou Kariya.

Even though he was under Chen Yu's Imperio, there were still insects wriggling beneath Matou Kariya's skin.

This made Nyarlathotep, who considered herself a lady, somewhat displeased. She didn't want her Darling to touch such disgusting things.

"Hmm... no wonder he's so ugly; there are so many disgusting insects inside this person's body..."

"And the insects in his body have the ability to communicate. Although Darling has controlled his mind, the insects in his body are constantly emitting pheromones to the outside world, continuously notifying other insects!"

Hearing Nyarlathotep's words, Chen Yu's expression changed. If Zouken Matou was forewarned and escaped, it wouldn't be fun.

"But don't worry, Darling, there are no other insects nearby, and when I first arrived, I casually set up a barrier, so the other party won't be able to know what's happening here."

Hearing that Nyarlathotep had already set up a barrier, preventing Zouken Matou from receiving news about Matou Kariya, Chen Yu gave her a thumbs up.

"Well done, Nyarlathotep."

"Hehe..."

Seeing that Nyarlathotep could easily discern Matou Kariya's physical condition, Chen Yu asked, "Nyarlathotep, do you have a way to remove the insects from this person's body without harming him?"

A body full of insects sounded quite grotesque.

Nyarlathotep claimed to be the "Smiling Chaos, the Omniscient and Omnipresent Librarian," didn't she?

Although he didn't know which Library Nyarlathotep was a librarian of, he felt that handling this situation should be a piece of cake for her.

Nyarlathotep nodded, then shook her head: "It's easy to remove the insects from his body, but the insects in his body have formed a symbiotic relationship with this person. Many important organs have been replaced by insects. As many as seventy percent of his body is replaced by insects. If they were directly removed, his body would have a large number of cavities, and he would be declared dead."

"I could fill the cavities in his body with some things, but those things cause significant mental stimulation to people and tend to make them... not human. Darling, are you sure you want to replace them for him?"

From sticky insects to slimy tentacles?

Chen Yu thought about the Cthulhu-style repair measures while shaking his head, rejecting Nyarlathotep's suggestion. It seemed he could only use the Confundo to sever the connection between the insects in Matou Kariya's body and Zouken Matou for now.

After using the Confundo to quiet the insects, Chen Yu finally felt it was foolproof to go kill the old worm.

As long as no one tipped him off, Chen Yu didn't believe the old worm could escape a surprise attack.

As early as his first time watching the Fate anime, Chen Yu had a deep hatred for Zouken Matou, especially for what Zouken Matou did to Tohsaka Sakura, which almost made him want to rush into the screen and wipe out that old bastard.

Now that he had the opportunity to eliminate Zouken Matou, he naturally wanted to crush this disgusting old worm with lightning speed.

"Let's go, Nyarlathotep."

"Where to?"

"To eliminate pests."

------

As Chen Yu and Nyarlathotep began to act.

The sky began to dim, and the bright moonlight was gradually obscured by dark clouds, leaving only a blurry moon vaguely visible in the cloud layer.

The wind whistled eerily through the trees, and as faint, purplish mist emerged, the buildings around the Matou Residence became indistinct.

Only the howling of the wind and the swaying of the trees remained, as if something was silently moving in the darkness.

As the Nameless Mist blown by Nyarlathotep enveloped the entire Matou Residence, it finally temporarily isolated the Matou Residence from the real world.

This was inside the Nameless Mist, Nyarlathotep's home ground, so Chen Yu no longer had to worry about Zouken Matou escaping.

Chen Yu, hidden deep in the mist, gazed at the Matou Residence in the distance.

Suddenly, a dense rain of insects surged out from the Matou Residence, like a rising tide, appearing overwhelmingly around the Matou Residence.

In just an instant, the ground was covered by a wriggling, dense carpet.

They were on the grass, in the mist, on the walls of the houses, seemingly everywhere, penetrating every crevice.

Immediately after, hundreds of insects formed a hunched, elderly figure, holding a staff, standing in front of the Matou Residence, looking at the mist that seemed to envelop the entire city, his expression grave.

"Is this no longer the present world? To be able to pull the entire Matou Residence into another dimension... I wonder which Archmage has suddenly graced my humble abode, playing such a joke on an old man with one foot in the grave."

A Magus's Residence is usually equipped with various magical barriers and traps to defend against invaders.

One could say that a Magus's Residence is their most formidable fortress.

As one of The Three Families of the Holy Grail War, the Matou Family's Residence was no exception.

Although the Matou Family had declined over several centuries, the magical defenses he personally set up were enough to deter the Archmages of the magical world.

But the means to easily pull the entire Matou Residence into another dimension was even more terrifying.

This posture indicated that the visitor meant no good.

"Damn it! Kariya is nowhere to be found, and even Berserker is unreachable..."

Zouken Matou continuously dispatched insects into the mist, but all insects that delved deep into the mist vanished without a trace, unable to provide Zouken Matou with any useful information.

Moreover, as time passed, Zouken Matou could clearly feel his control over the insect swarm weakening. The insects at the edge of the magical barrier, after being eroded by the mist, gradually broke free from his control and began to fight among themselves.

"Darling, should we just quietly watch this old thing gradually change his perception and eventually go mad in the Nameless Mist... That would be very interesting..."

Hearing Nyarlathotep's words, Chen Yu asked her, "Change perception... This surrounding mist has that ability?"

Nyarlathotep's purple pupils grew brighter in the mist. She stared at Zouken Matou in the distance, saying with sparkling eyes, "Of course, under the cover of the mist, any living being will gradually change their perception and become abnormal. The weaker the creature, the easier it is for them to go mad in the mist. This old fellow's soul has long since decayed, so he won't be able to last very long."

"Then it seems we need to act quickly. If Sakura also goes mad in the mist, then we would have come for nothing. Let's go, Nyarlathotep, let's confront this old worm directly."

After speaking, Chen Yu manipulated his Iron Suit to rush out of the mist and greet Zouken Matou with an RPG.

The rocket directly exploded in front of Zouken Matou, turning hundreds of insects into ashes, but this casualty was merely a drop in the bucket for Zouken Matou.

As the insect swarm gathered, it once again formed the image of Zouken Matou.

The direction from which the rocket was fired also indicated the target for Zouken Matou.

As the insect swarm surged towards the direction of the rocket, Zouken Matou finally saw the person who launched the surprise attack through the swarm.

"I thought it was someone else visiting my humble abode late at night, but I didn't expect it to be Caster and her Master. Why aren't you trying to operate the greater grail, but instead have time to visit my humble dwelling."

Seeing tonight's invaders, Zouken Matou's sinister voice sounded again.

Zouken Matou was still quite wary of Caster and her Master.

Ever since he retreated after seeing them once at Mount Enzou, Zouken Matou had been trying to gather information about Caster and her Master.

However, they seemed to have appeared out of nowhere, and he couldn't find any relevant information.

"Naturally, I've come to kill you, you immortal old thing."

Looking at Zouken Matou, who was composed of an insect swarm, Chen Yu knew that he was still not appearing in his true body.

Gazing at the overwhelming swarm of insects, Chen Yu immediately unleashed a large-scale "Blazing Fire!"

Like a fire god clearing the way, crimson flames immediately swept across the entire ground.

The ground instantly ignited with raging fire, sweeping through the entire insect tide in front of him under Chen Yu's control.

In the flames, the densely wriggling insects crackled like popcorn.

Just as Chen Yu was controlling the flames to surge towards more insect swarms, Nyarlathotep softly stopped him.

Nyarlathotep frowned, looking at the charred insect corpses on the ground: "Darling, what you're doing is very wasteful."

Chen Yu turned his head, looking at Nyarlathotep with some confusion.

"Darling, these insects are excellent feed; they can be used to feed my little Darlings!"

As Nyarlathotep's words fell, a huge crack opened behind her, and countless swarms of otherworldly bees rushed out.

"Insects, of course, are dealt with by insects."

These otherworldly bee swarms, each the size of a pigeon, were like a group of cruel predators, frantically harvesting the insect swarm before them.

"Hmph, my life is not so easily taken. I will wait for you in the Residence!"

Seeing that his cultivated insect swarm was largely defeated, Zouken Matou took a deep look at Chen Yu and Nyarlathotep, then dispersed this clone under the tearing of the otherworldly bee swarm.

"Let's go, Darling, the bee swarm can take care of this place. Nyarlathotep has found where his true body is hidden, let's go there and eliminate him directly!"

Seeing Zouken Matou abandon this battlefield, Nyarlathotep reached out her hand, placing it in front of Chen Yu.

Chen Yu naturally knew what Nyarlathotep meant. Taking Nyarlathotep's hand, amidst a dizzying sensation, he teleported through layers of magical barriers, arriving in front of a small house.

"This is the insect room..."

Pushing open the door, he found a huge space inside, the room filled with various insects.

And in the very center of the room, Zouken Matou, leaning on his staff, was already waiting there.

"Hehehehehe, welcome to my secret base, Caster and her Master. I didn't expect you to actually swagger in."

Zouken Matou laughed sinisterly, his tone sounding particularly strange, as if he already had victory in his grasp.

Seeing Zouken Matou standing among the Crest Worms, Chen Yu narrowed his eyes, wondering what other trump cards he had.

"Ah, I originally didn't plan to play this trump card now, but I didn't expect to be forced to such an extent by you. So, I can only let it be revealed to the world in advance."

As Zouken Matou lightly tapped the ground with his staff.

The disgusting insects covering the entire ground surged up like a wall, and then a dozen winged blade insects, each one meter in size, emerged from the ground.

"Don't underestimate these winged blade insects; they have all been meticulously cultivated by me. Each insect is an elite among elites. Their magic resistance reaches at least D, and some even reach B. Their bodies are harder than rock, and their strength is comparable to tigers and leopards."

"And..."

As Zouken Matou lightly tapped the ground with his staff again.

Countless twisted incantations, like insects, appeared in the room. Not only in the room, but even on the grass outside the room, twisted incantations were spread.

"A magic-sealing array has also been set up here. As long as you are within the Residence, you cannot communicate with the greater source, and any magical effects are suppressed. Even Caster's magic is no exception... Hehehehehe!"

Zouken Matou continued to let out sinister laughter. This was his Residence, which he had managed for several centuries, so he was not afraid of an Archmage's attack.

As long as the opponent was a Magus, they could not escape the trap he had laid.

Chen Yu didn't continue listening to Zouken Matou's bluster, but instead transmitted his voice to Nyarlathotep, asking, "Nyarlathotep, where is his true body hidden?"

"It's in his chest, looking like a cracked heart, with a long tail dragging behind it, quite disgusting."

Having confirmed the location of his true body, a Sith Lightsaber instantly appeared in Chen Yu's hand, and then Chen Yu enchanted it with the Avada Kedavra.

Seeing Zouken Matou still grandstanding, Chen Yu thrust forward forcefully with the Lightsaber.

The other end of the Lightsaber emerged from Zouken Matou's back, directly spanning dozens of meters and piercing through Zouken Matou's heart from behind.

Zouken Matou looked at the green sword light piercing from his chest, feeling his soul rapidly falling into darkness. Zouken Matou looked at Chen Yu in confusion.

I was so well prepared, why did I suddenly lose so completely?

"No... how can you..."

Before he could finish his sentence, his soul was already annihilated.

Looking at the fallen Zouken Matou, Chen Yu withdrew the Lightsaber, gracefully twirled it, and closed the fist-sized Dimension Door he had opened.

Greater source?

What is that?

You restrict Magi, what does that have to do with me, a Wizard/Sorcerer?