Use FGO to open the second dimension

El-Melloi II couldn't help but be shocked.

"Alright, El-Melloi II, this world isn't the one you experienced, so it's normal for there to be some deviations. The most important thing right now is this Servant without a Master, this outsider who inexplicably broke into this Holy Grail War!"

Koizumi focused his gaze on Assassin in front of him, his brows slightly furrowed.

"No Master? What about the contract? How to supply magic power?" Altria was immediately surprised.

Without any magical power supply, how did this servant appear in the world?

"The ability to appear as a Servant is naturally based on a contract summon. However, this contract shouldn't be a contract with a magus. If I'm not mistaken, you should be the user of the restraining force!"

"Restraining power!? Then the contract with this Heroic Spirit is the 'world'!?"

Dr. Roman was immediately surprised, but El-Melloi II was very calm. After all, he had roughly guessed it.

"...Why did you come to that conclusion?" As expected of the wielder of restraint, he wasn't surprised at all after being exposed, and continued to question Koizumi in a calm tone.

He was curious as to why Koizumi came to this conclusion now.

Koizumi curled his lips. It was because Doremi reminded him before she left that he guessed it.

[By the way! That Assassin hasn't made a contract with anyone! Be careful! His existence is very special!]

Furthermore, they themselves were not from this timeline. Observing this world from outside the timeline, anyone who suddenly appeared in this world was an outsider to Koizumi and the others. And if this outsider had no one else supplying mana, and simply appeared as an individual in this timeline to fight, then it would be obvious who summoned the other party. In the absence of other changes, the only thing that could allow a Servant to descend alone was the world itself.

Although I really want to complain about the bastard's lack of self-control, I'm clearly working for them, so why didn't I clearly explain my involvement when they arrived, so they could see me clearly before hitting me? Really!

Subconsciously, Koizumi covered the area on his hand and sighed softly.

If I could hit him, I would definitely give him a punch right now! Let him know the consequences of not speaking clearly! Even if I could suppress his power, I wouldn't be able to defeat him.

"It's simple, because we don't exist on this timeline either, and we're only looking down at the current situation from a higher perspective. We already knew that the end of the Fuyuki Holy Grail War would lead to the destruction of the world."

The person who said this wasn't Koizumi, but El-Melloi II, and his interruption was quite timely.

"What did you say? What's going on?" Alice was shocked.

Not to mention Irisviel, even Artoria listened to these words with shock.

Fuyuki's Holy Grail would destroy the world. Was this April Fools' Day? The Holy Grail, which could grant any wish, would now destroy the world? Altria suddenly fell into doubt about her life.

"...I was planning to remain silent until the end, but now I have no choice but to speak frankly."

El-Melloi II sighed slightly, while Koizumi rolled his eyes. He should have said it straight away.

After dealing with Archer, we should tell him everything. I believe that even if Iskandar will not stand on our side, he will not become our enemy for no reason. After all, if the destruction of the world succeeds, Iskandar's own wishes will become contradictory to this, and he will not sit idly by.

"Fuyuki's ritual this time is different from any in the past or future. This time it will definitely succeed, ultimately activating the Greater Holy Grail. This must be the reason why this place is observed by Chaldea—the true reason why this area has become a singularity."

Chapter 501: Assassin with a Human Heart

"Fuyuki's ritual this time is different from any in the past or future. This time it will definitely succeed, ultimately activating the Greater Holy Grail. This must be the reason why this place is observed by Chaldea—the true reason why this area has become a singularity."

El-Melloi II said calmly, his analysis was quite accurate.

"......! So, it's not just because space-time is unstable, but also because this is the base point of collapse, so it is observed as a singularity!" Dr. Roman suddenly realized.

"You... not only know the past, but also the future? Are you a being from another timeline?"

There was a strong sense of surprise and uncertainty in Irisviel's tone.

There's no way around it. Knowing the past and the future and coming from another timeline is incredible no matter how you look at it.

Not to mention her, even Koizumi would be deeply shocked upon learning that the person before him was from another timeline. After all, it was hard not to be surprised when such an unscientific thing happened right before his eyes.

"Indeed. I witnessed the fourth failure, investigated the fifth, and took precautions against the sixth. That's me. My mission is to compare the knowledge in my head and explore what makes this war different."

Having said this, El-Melloi II fixed his gaze on Irisviel before him and spoke slowly.

"And that answer... is you, Irisviel. You are both the vessel of the Holy Grail, the key to everything, and the Master who commands the Servants. You are the ultimate, pinnacle android of the Einzbern family, whose complete completion will likely take another ten years."

"10 years? Then..." Irisviel's face showed deep surprise.

"It may seem like a slight difference, but it's a decisive advantage. This way, during the Fourth War, the Einzbern won't have to rely on makeshift guerrilla warfare; they can face the enemy head-on and win. As a Master, they possess the coveted highest attributes, command the most superior Servants, and hold priority for the Lesser Holy Grail. This is essentially victory. And the victory in this war... is enough to activate the inhibitory force."

El-Melloi II said slowly.

"...You're saying that the Holy Grail War you know of does not involve any restraining force?" The mysterious Assassin instantly realized the key point. According to what the other party said, the Holy Grail War he knew of did not involve any restraining force?

"Indeed. Before the third war, it wasn't very effective, and the success rate for the fourth and fifth wars was about 50-50. At least from the perspective of the 'world', it wasn't an urgent matter that required intervention."

El-Melloi II nodded slightly, his eyes flashing with deep meaning.

"Einzbern's research was delayed by a generation during the Fourth War, and was finally completed during the Fifth War, but it was due to a strategic error. Honestly, I'm surprised that Einzbern was able to achieve such a unique situation as a General during the Holy Grail War."

"To put it simply, this singularity...is based on the possibility of 'what if Einzbern were superior', right?"

As Dr. Roman spoke, his tone was filled with a strong sense of realization.

"Indeed. And the Holy Grail reaction we discovered in Chaldea is probably Irisviel's own Magic Circuits... If Einzbern's creation has reached such a high level of perfection, it wouldn't be an exaggeration to call it a Pseudo-Holy Grail."

El-Melloi II sighed as he looked at Irisviel before him.

"I don't know whether what you said is praise or disparagement. It sounds very complicated. But compared to this, I still hope you can give a more detailed explanation." As she said this, Irisviel sighed as if in regret, and then her face became very serious, her eyes fixed on El-Melloi II in front of her.

"Once the Fuyuki Holy Grail is completed, the world will be destroyed. What is going on?"

"Ah. Let me tell you everything. Agent of Restraint, come with me. Compared to your current task, I can tell you a more thorough way to complete it." El-Melloi II kept the secret and spoke slowly.

"So, is there a simpler and more practical method than destroying this android?"

"That's not at all simple. However, let me ask you this question, Heroic Spirit."

El-Melloi II frowned slightly. He had some idea of ​​the other's identity. After all, was the Restraint so wicked? The two, who had been married in other worlds, hadn't met in this one. Instead, one had become the Restraint's agent, while the other fought alone as a Master.

But now they have to fight each other, which is really cruel. Should we say that it is worthy of being a restraining force?

"As long as the method is simple, will you do whatever it takes? Do you insist on killing Irisviel here with your own hands?" El-Melloi II asked slowly.

"...I don't know. I've never thought about it. Everything was forced upon me. I've already given up. There was no choice. But now, if I were to choose again..."

"Indeed, I can sense an inexplicable struggle. And as for this android...if there's another way, I'd also like to try to find it. Why is it like this? This is the first time I've felt this way."

As he spoke, the mysterious Assassin couldn't help but ask himself this question, with a hint of confusion in his tone.

In response, El-Melloi II smiled faintly and slowly spoke in response to the other party's doubts.

"That is, you still have a human heart. The human heart that remained in that foolish yet noble soul before you became part of the device that is the restraining force."

Thus, El-Melloi II prepared to take Irisviel and others to the burial place of the Greater Holy Grail.

But before that, Koizumi thought that he had to solve Sakura's problem first, because Sakura must not go with him.

If nothing unexpected happens, after this, he and his companions will have completed their mission and will have to return to Chaldea.

But Sakura can't follow. After all, Sakura belongs to this era and can't follow no matter what.

It seems like I have to comfort Sakura, otherwise something might really happen.

Moreover, Matou Kariya is still in a coma, so if someone rushes in here, it would be a bit worrying.

Thinking of this, Koizumi focused his attention on Chelsea. Chelsea's combat ability was not very high. Even if she followed him, she would not be of much use in close combat. However, if it was just for spying and assassination, she was very trustworthy.

Thinking of this, Koizumi roughly knew what to do next.

Chapter 502 Assassin Exits

"What, actually... the Greater Holy Grail was actually contaminated by the Anti-Hero!?"

A look of shock suddenly appeared on Irisviel's face, as if there was a hint of disbelief.

"That's what it means to see something once, and seeing it once is believing. Seeing something in person first is faster than any explanation."

El-Melloi II said this calmly as he continued walking deeper into the cave.

If I remember correctly, I've been to this place before, back when I was at Singularity F... Koizumi thought to himself, as he had come here with Cu Chulainn during the time he was at Singularity F.

Thinking this way, a hint of nostalgia flickered in Koizumi's eyes. If Miss Remlia came with him, the feeling would be different. Of course, Koizumi would not say it out loud, otherwise it would hurt Youmu's feelings.

"Dismantle the Greater Holy Grail... Since you knew in advance that this method could completely solve the problem, why didn't you implement it from the beginning?" A look of confusion appeared on the face of the mysterious Assassin.

"To put it in an analogy, it's like trying to take out only the contents from a barrel full of nitroglycerin. If you're not careful, the entire barrel will be ruined, causing a disaster. In order to handle it safely, you must make careful preparations in advance. One or two nights are not enough." El-Melloi II said slowly.

"But now we are rushing in without any preparation..." Dr. Roman couldn't help but say.

"Just think of it another way. As long as our firepower can outweigh the possible explosion inside the barrel, a brute force method like destroying the entire barrel is also possible. Roughly calculating the combat power, you Chaldea people, plus me and three Servants... it's not impossible to make this our goal."

Mashu couldn't help but nodded slightly. "Ah, but if we can successfully reconcile with the three camps..."

"Indeed, no more than four Servants will disappear, which is in line with the original plan and can be resolved more smoothly. If we can successfully win over Rider's camp, there will be no need to attack the Holy Grail like this. Therefore, the disintegration of the Holy Grail was not originally an option this time... But I didn't expect that the Restraining Force would intervene this time. As a companion, there is no more reliable helper than this." El-Melloi II said lightly.

"No matter when or where we're summoned to the battlefield, we're bound to kill for reasons and purposes beyond human intelligence. It's not uncommon to be misunderstood by anyone, even to become hostile to all humans involved... So, this feeling right now is truly strange. It's been a long time since I've felt the impact of establishing a collaborative relationship with someone... Hmm?"

The mysterious Assassin couldn't help but reveal a hint of emotion in his words.

But then, the mysterious Assassin seemed to notice something unusual and immediately became alert.

"Ahh. You can sense the barrier here too. I'm really impressed. It's the same aura blocking, but it's ineffective against a higher-level Assassin." El-Melloi II's mouth curled up slightly.

"After all, I'm also good at hiding in the dark. We can see through each other perfectly. However, if the level of aura concealment is the same as mine or higher, this power will be useless." The mysterious Assassin was also helpless about this.

Because the power of his breath concealing was the same as Chelsea's, he was unable to detect her.

Slowly, the hundreds of Hassans appeared at the entrance of the cave, each one full of rage.

It was obvious that the other party intended to use all their strength, and everyone surrounded Koizumi and the others one by one.

"Hateful... Don't think you're so great just because you can block a sneak attack! This time, I'm going to repel you completely!"

"Be careful. This time the fragments are a little different from the previous battles. They are going to use all the remaining fragments." El-Melloi II couldn't help but frown. If these guys started a group fight, it would still be a headache.

And seeing as Koizumi's presence is being reduced, it seems he can't continue fighting.

"Master, be careful! Please don't interfere for now! Leave the rest to me!"

Youmu quickly stood in front of Koizumi and slashed at the Assassins in front of him with both swords.

However, Youmu did not leave the area where Koizumi was for too long, which was also to protect Koizumi.

Because Youmeng knew that Koizumi was injured before, it would be better not to fight now. It would be best to have a good rest.

"Don't worry, Youmu, I can still protect myself. Just go all out! You don't have to protect me!"

Youmu was slightly startled by Koizumi's instructions, but she quickly nodded and continued to walk towards Assassin.

Since her Master has said so, Youmu will follow her Master's instructions.

Of course, she also secretly paid attention to the direction of her Master. As the saying goes, it is better to be safe than sorry.

Even if your Master is already very powerful, this is not a reason for Youmu to leave her Master aside without any worries, so she still needs to pay attention to him.

This is like Yuyuko and Youmu. Even though Yuyuko is stronger than Youmu, Youmu is still worried about Yuyuko.

This was not some unnecessary worry, but rather the most normal concern for his eldest daughter as a loyal court teacher.

Under the attacks of Artoria, Diarmuid, Youmu, El-Melloi II, Mash, and the mysterious Assassin, Hassan's clones began to retreat one by one, and even his original body was covered in wounds.

Even if there were more people, so what? Their individual combat power was ultimately too weak to compete with Altria and the others.

"Why...why are you trying to hinder our long-cherished wish..."

Hassan Baimao's tone was filled with reluctance, but soon, as if he heard something, Hassan Baimao's body began to tremble, and his tone began to become panic, no, it should be said that he became afraid.

"Ah, the bell... I can hear the bell... Our great ancestor—the first and last... Please forgive me... Once again... I am so unbearable..."

"Servant Assassin has been completely eliminated." Mashu couldn't help but breathe a sigh of relief.

"An assassin who missed the opportunity and failed to choose the right situation, that's all. The Master who gave the order doesn't seem to understand how to control Assassin." The mysterious Assassin said lightly.

"Haha. After all, the Master has changed. After losing Archer, Tōsaka is probably planning to switch to Assassin to fight again." El-Melloi II said this with a hint of sarcasm.

"If that's the case, Rin's father is really too unlucky." Ritsuka couldn't help but say so.

Koizumi simply chuckled and said nothing else. He was currently in the recovery phase.

"Hmph, for a clan blessed by talent... no, by circumstance, it's only fitting that they're in adversity!"

For some reason, El-Melloi II became a little gnashing his teeth.

"Your Excellency, who is usually so fair... is fighting something we can't see again..."

Mashu couldn't help but cover her face with her hands, revealing a speechless expression.

Chapter 503 El-Melloi II's Excitement

"Such a familiar place, it's the same old place after all." Seeing the postponement, Koizumi couldn't help but complain.

"After all, this was also the space for the final battle at Singularity F," Mashu replied calmly.