My youth story, a crossover anime, turns out, is FGO!

I don't know how many times we've clashed.

The invincible spear that slays gods is easily blocked by the seemingly decayed and broken greatsword. The servant, draped in a black cloak, is like a ghost from the abyss, each strike carrying the aura of death.

It's like being killed at any moment.

Karna's eyes grew brighter and brighter. To be honest, he hadn't expected to encounter such a formidable enemy on the very first day of the Holy Grail War, which ignited his fighting spirit as a warrior.

"Your sword carries the aura of death," the crimson scarf left afterimages in the air, and every attack Karna made was blocked at just the right moment, putting him into a state where his old strength was exhausted and new strength had not yet been generated.

"That was outstanding. Anyone else would have been easily beheaded by you," Karna stated calmly. "But you don't seem to have used your full strength. Was that at your Master's request?"

“My contractor only asked me to block your path, Son of the Sun, you can only return empty-handed.”

A ghostly blue flame lingered in the path of the Mountain Elder, yet his tall, dark figure was like a phantom, impossible to detect despite being there. Each sword strike seemed like a fatal blow coming from nowhere.

“Indeed, even if we fight until the sun is fully up, it will be difficult to determine a winner.” Karna stood with his back to the rising sun, the morning light tinging his white hair with gold, making his handsome face shine.

“I don’t really care, but you probably won’t keep up with me any longer.” Karna tilted his head, his large gold earring swaying gently. “Let’s end it here, Assassin.”

Having been blocked here for so long, whatever the Master behind Assassin wanted to do, he has probably already achieved his goal, and Karna has no intention of fighting to the death here.

"Your unwavering faith is admirable." As expected of Karna, who possesses the "insight of the poor," he almost saw through the essence of the Old Man of the Mountain. "We will continue to fight in the future, and I hope to see the true sharpness of your greatsword then."

Karna always felt that the old man of the mountain hadn't used his full strength.

"No doubt about it, Son of the Sun."

As if facing the son of the sun, the old man's figure appeared and disappeared in the shadows untouched by the sun. A ghostly blue light shone from the skull's dark eye sockets, and a heavy voice resounded.

“Your destiny has not yet arrived; the time for your execution has not yet come.”

Faced with a formidable enemy like Karna, even the Old Man of the Mountain, the Hassan among Hassans, became serious.

"When the evening bell tolls, that will be the moment you surrender your head, son of the sun."

"I see. I am truly grateful for the good fortune to be your opponent in our first battle." Karna's expression remained unchanged. "I look forward to our next encounter, old man."

As soon as he finished speaking, the white-haired spirit soared into the sky, leaving a red trail in the air before disappearing in an instant.

The remaining shadow of the abyss remained silent and still, quietly merging into the shadows, leaving no trace.

……

The two holy swords sparked fiercely in the air. Their masters were both incredibly powerful heroic spirits, whose names were renowned throughout the world.

That is why their swordplay was so majestic and untainted by any shadows, making it easier for them to appreciate each other.

Even Siegfried, who had been ordered to remain silent by his Master, had an incredibly bright look in his eyes at this moment. This was the joy of a warrior when he encountered a strong opponent of equal strength.

"That's it for now."

After another collision, Arthur lightly leaped backward to create distance, and Siegfried tacitly refrained from giving chase.

“If this continues, we’ll be fighting until sunset,” King Arthur said, already knowing their objective had been achieved. “My mission is complete, and your Master must be getting tired of it.”

Upon hearing this, Siegfried glanced at Gold, who had been hiding behind him, and chose to acquiesce.

Seeing that even King Arthur couldn't defeat him, Gold couldn't help but sneer, "Damn it, why isn't he showing up? The Master of the Red Team, the lackey of the Mage's Association!"

"I am your opponent! I am your Master!" This declaration intensified his resentment. Originally, Gordes thought that even if the Servants could not distinguish the winner, he could easily defeat his opponent in the Master battle and prove his ability.

The other party didn't even show up. Did they look down on him?!

The one who finally answered him was King Arthur.

“It is a great pity that I am the only one who has come to fight.” King Arthur’s blue eyes were icy cold. “However, I will not allow anyone to harm my Master unless they step over my dead body.”

Gordes was locked onto by this killing intent and couldn't help but take a step back, while Siegfried fearlessly stood in front of his Master.

"I hope we can fight to our hearts' content next time." Even the reserved Siegfried expressed his feelings after this exhilarating battle.

"Yes, a very enjoyable battle, Saber of the Black faction." King Arthur lowered his sword and said solemnly, "I look forward to our next encounter."

After speaking, he vanished in spirit form.

Siegfried followed the grumbling Gordes back to Yggdrasil, and the rift between the two Servants seemed to have deepened.

On the other hand, Makoto Aoki has achieved his goal.

“We have already preliminarily analyzed the rules of the Greater Grail,” BB was quite reliable when he was serious, as countless torrents of data flashed through his eyes, but in reality only a short time had passed. “We can connect our Servants to the Greater Grail as you wish.”

Integrating Makoto Aoki's Servants into the Greater Grail was something he had always wanted to do. If it was suicidal while Jeanne d'Arc was still alive, it became more beneficial than harmful after her departure.

With the Greater Grail providing mana, Servants can use their Noble Phantasms freely, and the burden on Makoto Aoki and the other Masters will be much lighter. You should know that after these few battles, Makoto Aoki's accumulated mana has been almost completely depleted, and Eriri, who only supported Arthur to use his Noble Phantasm once, is currently fast asleep.

At the same time, BB can also disguise Arthur as Saber of the red team. With the cooperation of Shishikatsu Kairi, it would be difficult for Amakusa Shiro Tokisada not to be fooled.

"Can you replace Jeanne d'Arc, BB?" Makoto Aoki asked the most crucial question. If BB could replace Jeanne d'Arc and become the ruler of this Holy Grail War, then they would be completely overpowered.

The fourteen Command Seals are no joke; even if the enemy unites, Makoto Aoki has nothing to fear.

After all, the idea that Joan of Arc was the ruler was just speculation. No one had actually seen her before she left the stage; at most, Amakusa Shiro Tokisada might have had doubts.

"Well..."

BB started keeping everyone in suspense.