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

As the three barriers were breached, countless spears of light rained down on Tiamat, and Valkyrie's full power caused Tiamat to begin to tilt.

The heroic spirits, worthy of being heroes forged in battles across different eras, seized the opportunity and unleashed attacks of A++ or even higher without hesitation.

"This sword is none other than the Holy Sword, unparalleled in the world. Each time it descends, it illuminates the world! Burn away everything with its brilliance! Display your royal might, Joyeuse Ordre, the Twelve Shining Sword that traverses the world!!"

Behind Charlemagne, the radiance of the twelve holy swords unfolded, their dreamlike form symbolizing the power of the ultimate fantasy.

That is not an illusion, but the embodiment of all human ideals throughout history.

Twelve rainbow-like rays of light descended upon Tiamat, causing her massive body to tilt as she moved closer to the Land of Shadows.

"For the Heavenly Defiance and the loathsome Kunitsu Orochi, what I desire to accomplish is known only to myself. Like... the dragon soaring through the skies (Amakakeru Ryu ga Gotoku)!!!"

Sakata Ryoma stood on the head of Miss Aryu, who had transformed into Kunitsu Orochi. Kunitsu Orochi coiled around Tiamat, forcing her to fall towards the gates of the Land of Shadows.

The twelve bronze statues of Qin Shi Huang also followed closely behind, and even though they were not as tall as Tiamat, they also helped to push her forward.

"Get out of the way! Marvelous Exploits!"

Banyan Paul appeared, bringing with him the power of the founding of the United States, and directly clashed with Tiamat.

"Imitation of the Divine Beast, the Four Unlikes!!" Taigong Wang also summoned the true form of the Four Unlikes, which, accompanied by a red magic circle soaring into the sky, suppressed Tiamat.

"Aaaaaaaaaaaa!!" Tiamat let out a shriek and finally fell into the Land of Shadows, with the other Heroic Spirits following her in.

That was a magical realm and otherworldly realm located outside the world, isolated from it. A massive "gate" leading to the "Land of Shadows" was temporarily summoned. This was not the work of the goddess Skadi, but rather the Celtic Scáthach manifesting a portion of the "Land of Shadows," the "City of Shadows," which was originally under her control.

"Welcome to Skadi's realm." The purple goddess, who is both the goddess of winter and has merged with Scáthach's power, resides high in the City of Shadows.

All the heroic spirits felt their power increase to some extent, their previously depleted magic power was restored, and even their various stats began to rise.

"Wow, that's amazing." Sakata Ryoma exclaimed sincerely. Aryu, who had transformed into Kunitsu Orochi, was the first-line main force in entangled with Tiamat, and at this moment, the wounds on her body were beginning to heal slowly.

This is precisely the effect of the "City of Shadows": anyone within its range who is recognized by her will receive immense happiness and blessings from the "City of Shadows."

Even without power, those loved by the "City of Shadows" can defeat powerful enemies.

"My brave warriors!"

Skadi's every move was imbued with the God's love.

"This is the final moment, our final battlefield. We will leave the outer heavens to others for now, and we will give our all. For the world we love, for humanity we cherish, let us end it all now!"

“My name is Scáthach Skadi, and I will love you and give you love (Primal Runes).”

The heroic spirits felt their abilities had been enhanced once again, thanks to Skadi's blessing.

"In this Land of Shadows ruled by Scáthach, Tiamat has lost her immortality!"

“Arrraaaaaaaaaaaaa——”

Tiamat let out a shriek.

"Servants of the Land of Shadows!" Skadi summoned the dormant power of the Land of Shadows, "Fight for me, Scáthach!"

Countless servants of the Land of Shadows joined the campaign against Tiamat, and Tiamat began to change.

After Tiamat entered the Land of Shadows, it became clear that she also realized something was wrong. The endless tide of chaos transformed into a monstrous wave, attempting to invade and obliterate this demonic realm.

However, the Buddha's light was constantly purifying the chaotic tide, and at least until he left the mortal world, Tiamat's chaotic tide had no effect.

Tiamat has begun a continuous cycle of rebirth, her Spirit Origin having returned from the Age of Gods to the Jurassic period. The Spirit Origin Expansion Project has ceased, and the Magic Core has been confirmed to be continuously restarting.

The many injuries she had suffered were healed, and the one who appeared before the heroes was God!

“Aaaaaaaaaaaaaaa——”

A colossal beast, sixty meters tall, appeared before everyone, its dragon horns and wings, its ferocious appearance echoing the mythical form of Tiamat as a dragon.

"Is this the dragon body?" A bead of sweat appeared on Joan of Arc's forehead. "What an enormous spiritual foundation it is."

"She's trying to escape!" Charlemagne spotted Tiamat's outstretched wings with lightning speed.

"It's alright. The Land of Shadows is already sealed off. No one can enter or leave except for warriors approved by Scáthach."

Skadi reassured her.

"Aaaaaaaa—" Tiamat screamed, finally showing a reaction other than passively taking the hits.

Dragon's breath.

The dragon's breath, seemingly capable of covering the entire Land of Shadows, swept in. Its endless heat could incinerate space. If Skadi hadn't mobilized the entire Land of Shadows' power to defend against it, this attack would have resulted in casualties among everyone.

But it's clear that Tiamat can still prepare for her next attack!

"We must hurry!" Joan of Arc declared decisively, her azure eyes reflecting Tiamat's massive form, filled with pity and sorrow.

"The hatred and sorrow of being abandoned because one is not needed by human history; and the joy of replacing the Earth's ecology and becoming the 'Mother of All Things' again after being abandoned."

"BEAST2, wielding the principle of 'Return,' is one of the seven great evils of humanity."

"The only thing that can fight against it is the World Weapon that deals with the Beast of Suppression, namely the Grand Servant."

Even with a Spirit Origin close to Grand rank, Skadi is not currently Grand rank.

"Look up at the sky, Origin Sea!"

Joan of Arc pointed her spear towards the Shadow Castle: "Your death is there!"

A tattered, black cloak fluttered in the wind, and a figure resembling death itself stood before him, wearing a skull mask and heavy armor. Eerie blue flames ignited from his eye sockets, and the same eerie flames surrounded his body.

Like death, like an abyss, like a shadow, like judgment.

The seemingly decayed and broken greatsword was stuck in the mud, and the assassin from the abyss gazed at the primordial mother goddess.

An old man from the mountains, unknown to anyone in the everyday world, appears at this moment.

He already possesses the Grand Rank bestowed upon him by the World Consciousness!

"Without death, there is no life; only with death can there be life."

"The eternity you speak of is not walking, but slumber."

"Beast of calamity, evil born of humankind. The very very love that yearns to return is the very foundation that rejects you."

“AaaaaaaaAaaaaaa——”

Tiamat seemed to sense the danger as well, and a cross of light flashed from her huge eyes.

"The title of Grand Master is not what I need; the proof of my strength can be found in this one strike."

"Although I am a god who has fallen into beast form, as the mother of origin, I must reveal my name."

"—I have come swiftly from the depths of the valley, from the darkness of death. I am Hassan al-Sabah, the old man of the mountain."

The corroded greatsword severed Tiamat's attack, and the old man's voice was like that of the Grim Reaper.

"The evening bell has already tolled on your name; I will, by the will of Heaven, strip you of your dragon breath!"

A flash of dark sword light.

"Aaaaaaaa!!"

“Beast’s spirit origin has changed!” Jeanne d’Arc smiled with delight. “This sword not only severed her dragon breath, but also imbued her with the concept of death!”

"Tiamat's spirit origin is still huge, but it's just an ordinary servant spirit origin now."

"We've finally defeated her, and we can finally eliminate her."

"Let's go together!"