Type-Moon Traveler's Enemy

"No." Illya said to Medusa with a serious face: "Rider, listen to me, something happened to Kuzuki Soichiro. I know you may be busy now, but you must be careful of Kuzuki Soichiro."

"Hmm?" Medusa, of course, remembered who Soichiro Kuzuki was. She asked, "Did he come to tell us something out of kindness? What exactly is it?"

Illya told Medusa what she had heard from Mo Li.

After hearing Illya's information, Medusa felt a plight: "That man, someone actually planted a bug in his heart? I know the details, I will tell Sakura and Emiya Shirou."

"Wait! There's one more thing!" Illya looked at Medusa seriously. "Rider, tell me, can you believe it? Are you completely free and not manipulated by anyone? Are you a Servant who only obeys the orders of the Master you summoned?"

Medusa showed a puzzled expression: "Why do you ask?"

"Answer me first! This matter concerns the life of your Master Matou Sakura!"

"...Yes, I only follow Sakura's orders. No one else can interfere or manipulate me except her."

Illya finally breathed a sigh of relief, then placed some enchanted metal aside to start soundproofing. "I think it's best to keep this secret to you."

Medusa: "Hmm?"

Illya continued, "There's a bug in Soichiro Kuzuki's heart. That's how Zouken Matou manipulates others. And the same is true for your Master, Sakura Matou. She also has a bug in her heart, and it's very likely Zouken Matou's true form!"

"What?" Medusa was stunned, and her brain seemed to stop for a moment.

Illya said seriously, "Medusa, if you have been paying attention to your Master, then you should know that there is a Crest Worm in Matou Sakura's body. Moreover, the changes the Matou family has made to her are not simple and have taken a long time."

"Since Matou Sakura was the candidate that Matou Zouken recommended to participate in this Holy Grail War, he would definitely leave behind a method to ensure that Matou Sakura obeys when necessary. Do you think that's right? And what other methods could there be?"

"Of course it's his insect magic. Then think about where is the safest and most hidden place. That's naturally inside Matou Sakura's body. I'm afraid he must have already sneaked in when he was transformed."

"Since we want to control it, the safest method is of course to occupy a place that can directly affect the whole body. It's either the brain or the heart. The brain can't be easily interfered with to avoid problems, so he can only choose the heart as the location."

Illya finished and took a break.

Medusa shuddered. If this Master wasn't talking nonsense for no apparent reason, then Sakura Matou must have a really big problem!

Illya thought for a moment and said, "Remember not to mention this matter around Matou Sakura. I think Matou Zouken will definitely be able to hear it."

Medusa said: "...I understand. Thank you for your information. I will find a way to solve it."

after a while.

Illya left.

Medusa thought about it and decided not to tell Shirou Emiya about this matter for the time being. The more people knew, the greater the risk, and Shirou Emiya might not be able to keep his mouth shut.

However, Zouken Matou's true body is actually in Sakura's heart, which is really hard to figure out. By the way, does Sakura know about this?

……

Another day has passed and it's just night time.

In the forest outside Fuyuki City, outside Einzbern Castle, Altria Alter startled Illya when she met up with her.

Illya looked at her in astonishment and said, "Shouldn't you be protecting Shirou Emiya? Why are you here?"

Altria Alter said, "Li Qiye said things are generally on track, so he asked me to come and see you."

"Come to my place?" Illya was puzzled. "What else could happen here?"

Altria Alter said, "I don't know. Well, just know that I'm nearby. I'll hide for now."

She showed up on purpose because she was afraid that Illya would ask her servant Hercules to find her. Now that everyone has been notified, she can continue to hide.

Before she disappeared, Illya quickly asked, "Wait! First, tell me what exactly your protection is?"

Altria Alter said: "I only protect you people. As for the Servants, it doesn't matter whether they live or die."

Illya was silent. Judging from what she said, and considering that Mo Li asked her to come over, did Mo Li think that she would be in danger today?

Illya returned to the castle and began to make arrangements using the supplies prepared by the Einzberns for the Holy Grail War. She released at least a hundred magic birds.

You wouldn't know until you released it. Once you did, you were shocked. Illya found that at least twenty of the magic birds she released disappeared after just a short while, and most of them disappeared on the ground.

Someone is destroying her creations!

"Sure enough, Li Qiye wouldn't send Altria Alter here for no reason." Illya's face turned grim. "It can't be Emiya Shirou and the others. If Kuzuki Soichiro is ruled out, the only targets left are the church priest and the old man from the Matou family."

"That's the old man from the Matou family. Let me see how you plan to break through the defense."

Illya activated the magic of Einzbern Castle to start protection, and then continuously released birds to bombard the entire forest.

During this process, you can see some flapping flying insects and disgusting bugs crawling on the ground being blown to death.

"It's you, after all." Illya smiled. "Now that it's confirmed to be you, it's easy. This isn't like the Tōsaka residence. How is Assassin going to break through the magical defenses of an entire castle? And his combat power isn't very high."

Illya made up her mind not to go out. After all, the turtle defense of Einzbern Castle was not so easy to break.

Illya began to use the Einzbern family's supplies to fight a war of attrition with Zouken Matou, and Zouken Matou was helpless.

He didn't know how he was exposed. He was not prepared to storm a castle by himself and the assassin, and Sakura Matou was not there yet.

Not long after, Zouken Matou simply let the insects hide, and sent out only cannon fodder to attract fire.

The two sides remained in a stalemate until Illya's face changed when she discovered that Shirou Emiya and the others were actually here.

"Brother, why are you here? Are you here to talk to me about helping Matou Sakura win the Holy Grail War and then using the Holy Grail to restore her body?"

Illya looked at the battle scene where explosions continued to occur throughout the forest and whispered, "But you came at a really bad time... There's nothing we can do."

"Berserker! Let's... go out and fight."