Illya: "Yu, you went to another world to gain the power to save me, right?" Emiya Yu: "That's right." Chloe & Miyu: "Then what's with all these girls sitting on the sofa?" Upon hearing this, Emiya Yu looked at the Burst Mage, the Blue Ribbon Goddess, the Gluttonous Sisters, and the Elf Family sitting on the sofa, and said naturally: "Oh~ my dear Illya, Miyu, and Chloe (Kuro), saving the world and chasing girls don't conflict, do they?"

Li Ke was reborn on Whale Island, acquiring the Plundering Ability System. He continuously plundered, stacked, synthesized, and upgraded abilities! Starting as a fishmonger on Whale Island, he killed countless fish over ten years! [Great Strength] (White) accumulated 100,000 times, upgrading to [Godslayer Power] (Black); [Weak Poison] (White) accumulated 100,000 times, upgrading to [Calamity Poison] (Black); [Weakness] (White) accumulated 100,000 times, upgrading to [World-Destroying Thunder] (Black)... When Li Ke left Whale Island and entered the Hunter Tournament: Hisoka: I admit, a ripe fruit can sometimes be deadly. Netero: We old guys have been eliminated by this era! The dying Chimera Ant King: You must have used your full strength, right? Li Ke. The world's strongest, all six Nen types at their maximum, the strongest human, Embossed...

When mathematical genius Lin Xian opened his eyes, he didn't see a world of flesh and blood, but a rational realm flowing with formulas and data. Having traversed the world of cursed warfare, curses were no longer indescribable terrors, but chaotic equations awaiting deciphering.

---

"Domain Expansion: Laplace's Demon"

"Style Reversal: Gödel's Incompleteness"

"The character '茴' in '茴香豆' (fennel seeds) has four ways of being written—while the curse of death has seventeen optimal solutions."

---

He pushed up his glasses at the super-grade cursed spirit that was devouring heaven and earth: "Your probability of existence is approaching zero."

He unfolded a draft paper over the tangled web of a thousand-year-old conspiracy: "There is a sudden change point in the entropy increase curve of your plan."

He even wrote a proof against Gojo Satoru's limitless technique: "The so-called infinity is nothing more than a romantic illusion of convergent sequences."

---

However, as the blood of Shibuya stained the mathematical model, and as the prison gates swallowed the last glimmer of light, Lin Xian finally discovered—

The deepest curse in this world is never the power of magic, but human nature.

The ultimate destination of reason may not be on paper, but in the wheat field growing beneath our feet.

---

This is the ultimate battle between reason and mystery.

[A hardcore epic that rewrites the rules of magic using mathematical formulas]

"When absolute rationality collides with the variables of human nature, the entire world of sorcery will tremble."

Su Can, who had just been admitted to university, died unexpectedly and ended up in a place called Mingbei High School.

In this cruel world, he chose the path of a cultivator to strengthen himself, completing one impossible task after another, all for the sake of obtaining that damned university acceptance letter.

With the merging of the two realms and the revival of spiritual energy, demons, ghosts, and dark creatures from another world simultaneously appear in the world.

The passionate young man Yu Zhibo obtains a system panel, awakens his Sharingan, and can use various ninjutsu!

What? Lightning attribute has a counter effect on demons and ghosts?

I have Chidori for single-target kills and S-rank ninjutsu Kirin for full-coverage bombardment. Are you scared?

Are dark creatures afraid of fire?

My Great Fireball Technique can obliterate you into dust, cremate you, and reduce you to ashes in one fell swoop!

Under my ninjutsu: all demons and monsters will be reduced to ashes!

Under my Sharingan: all disguises will be exposed!

My child, on the day you were born, your name echoed throughout Fuyuki City: "Rin Tohsaka." My child, I proudly watched you grow day by day, becoming the embodiment of "Iron Fist." Remember, we have always lived in this world with elegance and "wisdom." I also believe you will use the power of "dropping the ball" cautiously. But true victory comes when I bear the blame. One day, my life will come to an end, and you will become a demon!

"I just cosplayed as Su Nuo, and I actually time-traveled?"

Hoshino Yu finds himself transformed into one of Sukuna's fingers in a strange world!

The world is full of evil spirits, but ordinary people can't see them?

Then Hoshino Yu discovered a serious problem.

The fact that ordinary people can't see evil spirits means they can't see fingers.

Being unable to see means being unable to touch or have one's body taken away.

"Wait, did she see it?"

Yotsuya Miko? How did I become a Nuo lama?!

Takatsuki Sen? Would you like to be my pet?

Muzan? You're holding your head too high.

The visible ones are Miko, Ghoul, and Demon Slayer; the rest are pending.

"Commander of the Ninth Shadow Legion, Ainz Ooal Gown, requests to fight for my lord!"

The skeleton in the deep purple robe knelt on one knee, its ghostly eyes gleaming with unwavering loyalty.

"Go on, Old Bone, keep your spirits up, don't lose points! Give that old hag, the Fake Witch, a little shock."

Natsuki Subaru sat lazily on the Sky Throne and casually waved his hand.

In an instant, tens of millions of shadow warriors, skeleton knights, dragons, and mages surged out like a tidal wave, covering the sky and instantly turning the earth into a pitch-black ocean.

I, Natsuki Subaru, also known as 486, the script master, the god-slayer, the demon god, the master of the Witch of Deception, the strongest Servant, and the number one unranked powerhouse...

I, Natsuki Subaru, am the most powerful Shadow King in the world of crossover anime!