I join the chat group as the protagonist of the system stream

To this world, the soul is an eternal existence.

As long as the memory design exists in a dimension different from the material world called the Star Realm, the soul will not die.

"Third Law"

Based on one of the five major magics in this world, it is the magic that achieves true immortality. Based on one's own soul, one can derive eternally moving infinite energy and use the immortal soul as a template to create a perfect body that matches it.

The so-called Holy Grail War is a ritual to realize the third law. The wish-making function of the Holy Grail is actually equivalent to the by-product application of this ritual.

On the mountain behind Liudong Temple, there is a large underground cave that is cold and wet.

Shirou Emiya walked in, looked at Caster who was wearing an indigo and purple hooded cloak and a purple robe in front of him, and asked: "How is it, Caster, is there any progress?"

"Based on the information you provided, coupled with those powers, it is very possible to purify the Holy Grail." Caster turned around, his long blue hair swaying, and there was always a hint of vigilance in his pupils.

After witnessing the battle between Gilgamesh and Shirou Emiya in the sky above Fuyuki, when Shirou Emiya brought Saber and the monster Hercules to Ryudou Temple, she had no idea of ​​resisting at all. I just want the other party to let go of my master, Soichiro Kuzuki.

But the other party unexpectedly proposed cooperation, and as if he knew the future in advance, he promised that she could obtain a physical body through the Holy Grail and would not take action against her and Kuzuki Soichiro.

"What's the time?" Shirou Emiya nodded and asked, "How long will it take?"

"The magic power of the spiritual veins is sufficient, and the magic power outside the Holy Grail can also be used." After Caster pondered for a moment, he gave an answer: "It will take three days at the fastest."

"It doesn't matter, the time is not so tight." Shirou Emiya looked at the large-scale magic circle that continuously drew magic power from the earth's veins, and said:

"As for Illya, I leave it to you."

"Her body function itself has been greatly extended, and the remaining minor hidden dangers are easy for me." After Caster finished speaking, he hesitated and asked in a cold tone:

"I said, aren't you worried that I will take this opportunity to counter you? You should know my identity, right? My real name is Medea, a traitorous witch who lived in the same era of gods as Hercules."

"Heracles, who has regained his rationality, should have warned you, but you don't even intend to sign the contract?"

"Counterattack?" Emiya Shirou was stunned, then he understood what the other party meant, and smiled: "We are an equal cooperative relationship, where does the term counterattack come from."

"As for your identity, it doesn't matter. The legends passed down cannot represent the whole person. The Caster who appears in front of me now is just an ordinary woman who wants to spend the rest of her life with my teacher."

"I don't want Illya to be harmed, and I don't want any more unnecessary victims to appear in the Holy Grail War."

"In a sense, we are moving in the same direction and do not need to be bound by a contract."

Caster was silent for a few seconds. She didn't know whether this trust was due to his confidence in his own strength, but

She did feel sincerity from the other party's attitude and communication.

"Why a guy like you appeared in the modern era after the end of the myth is really an unsolved mystery." Caster Medea turned around, took out a metal staff again and knocked it on the ground:

"I have a good impression of you, so if you fulfill your agreement, I will do my best."

"It won't be difficult to help that brat complete the third act later. Just use a loophole to summon a few followers as sacrifices."

"If possible, please think of other ways. I always feel that it's not good to summon others and then kill them like this." Shirou Emiya smiled awkwardly, "Then I'll leave it to you."

Before leaving, Emiya Shirou set up a formation on Mount Enzo and handed over control to Caster to prevent Gilgamesh or Cu Chulainn from coming here to destroy it.

["I'm sorry to tell you that I confirm that the Holy Grail you are looking forward to cannot change the past, and the same will be true after purification."

"The so-called Holy Grail War is just a conspiracy of magicians who want to use the Holy Grail War and the entire heroic spirit system to reach the source vortex."

"Fulfill your wish? Ah, it is indeed possible, but it requires the use of magic power to a certain extent. Want to change the past? Hahaha. You are really an innocent little girl."

"Caster, don't say irrelevant words!\