Please play Fate/Go with me.

“Yes, if we’re going to do it, a Reality Marble alone won’t be enough. If you want to become stronger, well, why don’t you use your Mystic Eyes to strengthen yourself from head to toe?” said a woman dressed in a black magician’s robe.

“I agree with Medea’s assessment,” Leonardo da Vinci said.

“That’s interesting, let’s do it that way.” Cú Chulainn agreed.

"Medea!" Shirou exclaimed in surprise when he saw the blue-haired, pointy-eared woman walk out. Even the treacherous witch had come here.

Medea smiled and looked at the boy, saying, "Oh dear, it seems you also have memories of meeting me before. But which world was it? Hehehe."

"I feel like I'm getting more and more confused about the situation..." Seeing the black wizard who was known for murdering hundreds of children, and now seeing the treacherous witch Medea, Shirou suddenly felt uneasy.

"Well, the Heroic Spirit system is full of mysteries. There are things I don't even know, so don't worry about it," Da Vinci said reassuringly.

With the help of many magicians from the Age of Gods and geniuses from various fields, the concept and method of creating the Spirit Origin were finally perfected. In the end, the Holy Grail was used to create this special Spirit Origin that would evolve as his heart grew stronger.

Shirou used the Holy Grail to develop a unique Spirit Origin, which transformed his mental world into a 'phantom spirit' that remained dormant most of the time.

When Shirou needs it, he can connect to Chaldea through the FGO system, summon this Spirit Origin as a Heroic Spirit, and have it possess him, thus turning his ideal self into reality and allowing him to become the ideal Heroic Spirit for a certain period of time.

This was something that should have been impossible, but he achieved this miracle through the powerful magic of the Holy Grail and the omnipotent wish-granting machine. Just like his projection magic, the more complete and powerful his imagined self was, the stronger his spirit origin would become.

Relying on the immense magical power provided by the Holy Grail, the boy's Mystic Eyes connect the past, present, and future, as well as other worlds, parallel universes, and Lostbelt universes, searching for his own 'strongest' power.

In different worlds, there exist beings who are extremely similar to him and closely connected to him, perhaps his past life, future self, or a parallel world version of himself.

An archer with long white hair, wearing a kyudo uniform and a mythical costume;

A craftsman with short red hair who made a living by forging iron and died for it, reaching a divine level in this field;

He lived through countless years, achieving a miracle greater than magic, and found his way to a distant ideal land to reunite with his beloved girl.

A white-haired, white-clad heroic spirit appeared before the Primordial Mother Goddess, standing alone against all...

Which one is the strongest? The boy didn't know yet.

All he can pursue is becoming the strongest he can be right now, nothing more.

Just after that, Shirou walked out of Leonardo da Vinci's workshop, where several Heroic Spirits were openly eavesdropping at the door.

"Hey, Shirou, did you come here to ask me out?" A graceful girl in a high school uniform with fox ears laughed and approached.

"Ah... Ah! Suzuka Gozen." Upon hearing the familiar voice, Shirou paused for a moment before recognizing the girl before him. Unlike when she was possessed and summoned, where she was combined with Yuihama, this beautiful appearance was the true form of this Heroic Spirit.

"Shirou, have you finally accepted my invitation?" The tall, voluptuous woman in armor was moved, her eyes misty with emotion, and she opened her arms to embrace him.

This time, Shirou recognized him immediately and quickly stepped back, shouting, "Hey? Raikou, wait! Don't come any closer!"

"Huh? Why are you being so cold? Did I do something wrong?" Minamoto no Yorimitsu asked, feeling wronged and on the verge of tears.

“No, it wouldn’t be good to bring him here in any sense,” Shirou said, waving his hands.

“…” Niu Ruowan stood aside, silently watching the man who had once patted her head like an older brother.

"Brother? It really is my brother!"

"An older brother from another world! He's just like my older brother at home in every way."

Only then did Shirou notice that there were two other little girls who looked exactly alike, but with different skin and hair colors, staring at him with wide eyes.

"Illya? Two Illya!" Shirou was surprised to see two little girls. The silver-haired girl was dressed like a pink magical girl, with a five-pointed star ring beside her. The other girl was dressed in red and black, and her style of dress seemed familiar, and a bit revealing.

"I'm Kuroi, nice to meet you, big brother!" Kuro blinked and looked over.

"Eek! I didn't expect to see Shirou here too. Illya, that's great! Now you have three older brothers! It's practically a harem!" Ruby flapped her wings, twisting her body in the air, and said happily.

Ilya stood there, seemingly slightly moved, but immediately blushed with embarrassment and shouted, "Ruby! Shut up first!"

With a slightly flushed face, Ilya turned to the boy and introduced herself, "Hello, big brother, I'm Ilya."

"Why don't we find a place to sit down and talk?" Shirou looked at the two girls and realized that they were not the Illya he knew. He then smiled with relief and said.

“Sure,” Ilya replied.

After that, Shirou sat down and talked with the two girls to learn about their world. Unexpectedly, Kiritsugu ended the Holy Grail War there, and Illya was living a normal life, but then she got caught up in other events.

"So such a world exists." Shirou sighed. The girl no longer needed to participate in the Holy Grail War as a minor Holy Grail, but instead became a magical girl as a primary school student of about ten years old, collecting class cards and fighting her way to save her important friends.

"Actually, I was also startled when I saw my brother with black hair," Ilya said with a smile.

"Yes, Illya, Kuro, you both worked very hard, it's really amazing!" Shirou reached out and patted the two girls' heads, praising them and sincerely hoping that their efforts would lead to happiness.

"Hehe, I got praised by my brother!" Ilya said happily, squinting her eyes.

"Really, don't treat me like a child..." Little Black blushed and muttered softly as he was patted on the head.

"Alright then! Where's the kitchen? I'll treat you guys to a good meal today!" Shirou said, rolling up his sleeves with great enthusiasm.

"Really? I'll come! My brother's cooking is amazing!" Ilya said happily.

"Big brother, are you also good at cooking? How does your cooking compare to your brother's? If you don't satisfy me, you'll have to make it up to me," Xiao Hei said with a mischievous grin.

"No, I wouldn't know if I hadn't competed." Shirou shook his head with a smile. He had only lived two lives. In his previous life, he had traveled to most parts of the world and accumulated a lot of experience.

So, amidst the anticipation of everyone at Chaldea, Shirou prepared all the dishes for the day, bringing tears of happiness to the eyes of all the staff. Finally, with a heavy heart, they watched Shirou return to his original world.

Chapter 50 Perseus Appears

After returning home from Chaldea, these Tenshirou have been training to gradually familiarize themselves with and master this new power. A new card with a question mark has appeared in the FGO system on their phones; its class and rank are both question marks. The card itself is blank, just like the meaning of this Spirit Origin—like a blank sheet of paper, currently weak but possessing infinite possibilities.

Since his sister was attacked by a monster, Shirou has become even more dedicated to his training. In the mornings, he practices with Matthew in the archery club. At noon, he goes to the service club to have lunch with his friends and discuss the day's activities.

In the Service Club, Shirou sat with his companions having lunch, and Shirou talked about the amazing things he had seen at Chaldea.

"Huh? Shirou-senpai went to Chaldea! And he met with everyone?" Matthew asked in surprise.

"Yes, everyone is very kind and welcoming. The staff also told you to take good care of yourself," Shirou said with a smile.

"Really? It's better if everyone's in good spirits." Matthew missed the people from Chaldea a little.

"Oh, by the way, a few knights from the Knights of the Round Table and the Knights of Fiona asked me to give you their regards. Matthew is quite popular in Chaldea, you know," Shirou said.

"Hey, forget about the round table, and the Fiona Knights..." For some reason, Matthew seemed a little disgusted.

“Matthew is very popular at school, definitely not to the extent that he’s favored by Iroha,” Yuihama said.

"Shirou, haven't you heard? Matthew has been recommending FGO to people both inside and outside the school, saying that the other person is a good person. I don't know how many young men's fragile hearts she has broken. What a sinful woman!" Asuna said with a smile.

"Asuna-senpai, please stop! That's not what I meant!" Matthew said.

“I’ve heard of that too. There are titles like ‘first-year mixed-race beauty’ and ‘hairpin fanatic’,” Yukinoshita, who was reading a book, chimed in, glancing at Shirou and smirking. She made a V-sign under the table with her other hand, which wasn’t holding a book.

Shirou was embarrassed; this guy really always wanted to prove himself superior to him in everything.

"But Matthew is so popular, huh? That's great. Maybe he'll find someone he likes," Shirou said with a smile.

"You idiot, senior!" Matthew suddenly puffed out his cheeks and cursed, poking at the meatballs in the boy's lunchbox with his chopsticks, then angrily turned his head away and started eating.

"Yeah, you really are an idiot. Well then, I'll take this meatball that looks delicious." Asuna smiled and took a meatball.

"Hmph, you idiot! You idiot! It's delicious~!" Yuihama joined in the fun, ran up and unceremoniously picked up another dumpling, put it in her mouth, and showed a happy smile.

“I think everyone is right.” Yukinoshita also held out her chopsticks in this direction.

"Wait, isn't it a bit much to not leave me a single one?" Shirou's special four-happiness meatballs in his lunchbox were gone just like that; they were the only meat he had prepared for himself.

"It's your fault for not doing your share, this is a return gift, don't be shy." Yukinoshita picked up some food and put it into the boy's lunchbox.

"No, you should have been a little more polite to me before. Your image as an ice queen has completely collapsed." Shirou looked at the radish in his lunchbox and felt a pang of sadness.

"Shirou, here, this is for me." Asuna smiled gently and kindly, picking up a piece of cucumber from her plate.

The cucumbers were cut neatly into rings, which had a cute, girlish feel to them, but even so, I wasn't happy.

"Yeah, yeah, it's all your fault, Shirou," Yuihama said, suppressing a laugh.

'This guy clearly didn't understand anything, yet he took the opportunity to eat the meatballs, and now he's putting food he doesn't like on his plate.'

"It's the senior's fault!" Matthew didn't seem to be getting over his anger so easily.

"Fine, forget I said anything." Shirou ate the vegetarian meal he had traded for four large meatballs from his lunchbox with a sullen expression. Radish, cucumber, potato, and eggplant were all included, and surprisingly, the taste was not bad.

But I still crave meat! Humans are omnivores; both meat and vegetables are indispensable. Otherwise, nutritional imbalances will lead to unhealthy health issues. Even vegetarians, when giving up meat, must ensure they obtain the necessary nutrients from other foods. (Monthly subscription group: 694936135)

However, if one only focuses on satisfying one's appetite, like young girls who only think about grabbing meat to eat, then...

If one day they find that their figure has changed and their belly has become rounder and bigger, it's all their own fault, so don't blame him.

"Shirou, are you thinking about something rude?" The girls all looked over at the same time.

"No, I was just thinking that everyone's skin looks so good lately, so radiant and glowing, hahaha," Shirou replied, turning his head away.

At this moment, a hole was opened somewhere in another dimension, and a man dressed in black was sitting there. Black earthworms were surging within his body, constantly repairing his body, which was now almost complete.

Perseus, a Heroic Spirit corrupted by the black mud, originally appeared in the world as a Rider. He possessed Pegasus, the Pegasus that killed Gorgon and flew out of the monster's body. He was a Heroic Spirit known for possessing a variety of divinely bestowed Noble Phantasms.

One of them is 'Riding the Hero's Reins', which was originally designed to allow the Pegasus mount of the Fantasy species to unleash its full potential, launching a super-fast attack like a comet falling. It is a unique skill that combines offense and defense.

After being corrupted and transformed by the black mud, Perseus's class is unknown, and this Noble Phantasm, with the blessing of the Holy Grail, has become capable of summoning and commanding hundreds of magical beasts.

Secondly, there is the 'cloak that can freely change appearance and aura'. He used this to appear silently behind Shirou before. If Asuna hadn't blasted him away with Raikou's Noble Phantasm, he would have succeeded.

The third is the 'Hapal, the sword that kills the undead', which is more like a scythe than a sword. It can nullify the immortal and prevent wounds from healing.

Other items include feathered shoes for walking on air, bronze shields for detecting movement, and bags for storing monsters.

"Revenge! Revenge on Emiya! Revenge on that man who denied everything about us!" Perseus said, his eyes bloodshot. He opened a bag and released a huge monster's body, which moved slowly along the ground like a snake.

In the afternoon, Shirou's phone vibrated; it was a message from Tatsumi.

"Shirou! A message from Chaldea! They've detected Perseus's presence!"

"Alright! This time we won't let him get away again!" Shirou clenched his fist and said with high spirits.

These past few days, the young man has been patiently enduring, much like an outstanding archer of ancient times. When he determines the route his prey will take, he will often wait in a sheltered spot for hours, or even a day and a night, conserving his energy so that he can burst forth the moment the target appears, piercing through its skin and killing it without harming its fur.

Chapter 51 Sword-Forging Heroic Spirit

The black-clad Perseus appeared in the plaza near the sports center, instantly isolated from the world's alternate dimension. He came to this vast place, which was truly the best battlefield for him to lure Emiya here and then cut off his head.

Behind him, in the vast void, emerged a gigantic monster shrouded in black silt. It had black wings and a body shaped like a tall, alluring woman, but its tailbone was connected to a long python's body, which moved across the ground.

Several deep purple snake heads with gaping fangs and large mouths branched out from the ends of the long black hair. The crimson eyes had lost their reason and were those of a terrifying monster that wanted to destroy everything.

"Gorgon! Take revenge here! Then let Emiya die in despair!"

This is Gorgon, the strongest monster that Perseus summoned with the Holy Grail. She was originally a mother and goddess to the monsters, but now she has completely become a monster that has lost its mind.

Perseus, as an enemy, would not normally be able to command monsters of this level. According to legend, Perseus used the head of the Gorgon many times, turning giants and enemies into stone statues when facing crises. It was this legend that allowed him to summon a part of the Gorgon.

The enormous monster here is not Gorgon's true form, but a fake created by the Holy Grail through a forced distortion of a part of Gorgon's spirit origin. In addition to possessing immense destructive power, it has also been partially degraded.

The endless howls of monsters echoed from the beast's lair, and then the beasts were tamed in the lair of the Rugo'ergong, ready to launch their final attack.

"Haaaaaah! I'm going to destroy the world Emiya hoped for, just like he destroyed our honor! Let him go to the underworld to repent!"

Perseus let out a maniacal laugh.

"Roar!" The enormous demon Gorgon spread its jet-black wings and roared. Its crimson eyes had completely lost their reason. It summoned a huge beast nest, which was its treasure, the 'Temple of Ten Thousand Demons'.

"Break through this barrier, establish this temple in the world, devour! Slaughter! And then destroy!" Perseus roared.

Hordes of monsters roared and began to hoarse, swinging their claws to attack the world's defenses.

"We won't let you get away with this." Just then, the boys and girls finally arrived.

"I'll leave the monsters here to you. I'll handle this guy," Shirou said to his companions, then turned to look at the completely destroyed Heroic Spirit. No, he was definitely a completely different person from the legendary hero.

"Since they are evil, then I will slay them!" Shirou's eyes turned cold. The most evil and wicked enemies before him—for his family, for his friends, for the world—no matter the reason, he had to eliminate these monsters.

The Holy Grail connects to the phantom spirit origins within Chaldea, and it is summoned to the world where the boy resides.

Within the system, the snow-white card surface changed in that instant. Lightning crackled around the card surface, transforming into a golden knight standing upright with his sword held high at his chest.

A blinding white light enveloped the boy, and his mental world underwent a unique transformation under the influence of the Holy Grail.

As his training became more proficient and his resolve strengthened, this time he achieved an even higher level of completion. He still opened his demonic eyes, his muscular upper body was bare, his hair had turned red, and he wore a white cloak.

His left arm was wrapped in a red shroud, while his right hand held an exquisite samurai sword.

This is a divine weapon that transcends ordinary weapons, the result of a lifetime of research and the forging of tens of thousands of blades. Although it is a failed product, when it unleashes its full power, it is enough to cleave a world in two.

As he held the Muramasa sword in his hand, the combat experience of a swordsmith from another world who had reached the realm of gods in the art of forging entered the boy's mind. He had forged all kinds of weapons in his life, knew the advantages and disadvantages of every inch of each weapon, and was naturally proficient in how to use those weapons.

The amber-colored magic eye witnessed the life of this blacksmith, a young man born into a family of blacksmiths, with exceptional talent and a heart full of justice.