Academy City. A magical city with a population of 2.3 million, filled with countless individuals possessing extraordinary abilities. Standing at the pinnacle of that city are true monsters. The first, Accelerator. The pinnacle of existence, possessing the strongest and most evil ability to truly control the direction of all energy, the strongest and most all-powerful monster in Academy City. He will face encounters with countless worlds that transcend time and dimensions. This is a world where countless imaginative beings converge, a world of magic, a world of technology, and all sorts of people and things will mingle within it. And then, the first will experience all of this firsthand. "—Interesting, then let me see how your so-called justice actually works, heroes?" Accelerator, who has degraded himself to a villain, the most vicious and evil anti-hero, what kind of encounters will he encounter on this journey beyond dimensions? The strongest and most evil one-way dark hero awakens here. A crossover anime/manga fanfiction, the protagonist is Accelerator from the original work, striving to recreate the feel of the original A Certain Magical Index.

Evan transmigrated to the world of Fairy Tail. He arrived very early, only a day after Natsu joined his guild. This world was dangerous, with accidents possible at any moment; yet it was also wondrous, scattered with countless precious and alluring treasures. Weary of the mundane, Evan quickly integrated into this world. Although things didn't go smoothly at first, he steadily progressed. He witnessed the destruction of a village, experienced stories of blood and tears buried deep in darkness, met the Mirajane sisters in a village haunted by demons, became a rising star amidst lightning and thunder, and together with Natsu, wrote a new chapter in history.

Transmigrating into Overlord, she became the strongest [air]. Ainz Ooal Gown, you wanted to outwit and outmaneuver air, didn't you? If you think you can be defeated so easily, then I'll grant you that defeat. After being afflicted by [Allure], Shalltear recalled being raped during her amnesia. She has already appeared in *Classroom of the Elite*, *Guilty Crown*, *Detective Conan*, *Yuno Gasai's Future Diary*, *Baka and Test*, and *White Album*.

Li Xing accidentally obtained a golden orb of light. He initially thought it was just a tool to travel between different worlds, but he never expected that the orb would have a more powerful function. Soon, Li Xing embarked on the path of constantly traveling and devouring worlds to establish his ideal God Space.

(Half-funny + scheming + satisfying + doesn't fawn over Konoha + semi-invincible + many girls)

The original female characters who were saved: Mikoto Uchiha, Tsunade, Kushina Uzumaki, and Nono Yakushi...

The protagonist is reincarnated into the Naruto world, and after unraveling the mystery of his birth, he discovers that he has become an adorable Uchiha boy and obtains the Blacksmith System.

In the early stages, he distributed weapons in Konoha; in the mid-to-late stages, he left Konoha and distributed weapons throughout the entire ninja world, watching others get beaten to a pulp.

When others use his weapons, he can also gain the attributes, abilities, talents, ninjutsu, and bloodstains of those people.

Moreover, all those who died using his weapons or were killed by his weapons were taken into his Temple of Death.

They only care about fighting, not putting in any effort; they'll just be brothers inside the Ten Thousand Souls Banner!

Kirito Ichimonji, Murasame: One-Sword Slash, Demon Possession, Haki Seed, Stone Mask, Demon Sword Stealing, Demon Sword Thousand Blades, Devil Fruit, Ryujin Jakka

[…Advanced mastery of the Water Dragon Sword, talent copy activated: Advanced Mastery of the Hatake Sword Technique]

[Advanced utilization of "possessed by evil spirits," talent replication activated: Intermediate level of the Thousand Hands Clan's physique]

[The utilization of "possessed by evil spirits" has reached its peak, and the talent for copying is activated: Intermediate Wood Release Power]

[This allows the A-rank "Possessed by Evil Spirits" to evolve into the S-rank (pseudo) "Possessed by Evil Spirits - Wooden Dragon"]

[...Utilization of Lake Toya has reached intermediate level, Talent Copying activated: Intermediate Observation Haki]

[...The utilization of Haki seeds has reached the intermediate level, and the talent for copying has been activated: Intermediate Armament Haki]

Worlds involved: [Tokyo Avengers - From Today, It's My Turn!! - Yakuza - Crows Zero - High & Low]

This is a world full of passion.

Here, strength reigns supreme, the mighty rule, and everyone can obtain everything through their fists.

Some people fight for their brothers, others fight for their ambitions.

Ryuichi Kurosaki travels through time to create his own era!

He could only gather a gang of wicked people, even more wicked than the most wicked.

[Selling jars + Neutral + Ability to travel to all realms + No female lead]

Xia Wen transmigrated to the world of One Piece and awakened the [Multiverse Jar System].

He can get the same thing as long as he sells a jar.

Furthermore, selling a certain quantity will also grant you exclusive jars and other benefits such as shop owner privileges.

[Rumble-Rumble Fruit] + [Unthinkable Slash] = Thor Nami!!!

[Eight Gates] + [Six Treasures Immortal Thief] = One-Punch Kaido!!!

[Demon God Manifestation - Essence of the Demon] + [Heart Cleansing Mantra] = Absolute Zero Kuzan!!!

When Shirahoshi encountered the shrinking lamp, she shrunk to a normal human size. When Shanks ate a Senzu Bean, he grew a new arm.

When Akainu drew his Ryuuka sword, Jakka, it ignited the sea. When Crocodile sat atop the Creation Engine, contemplating the future.

When Luffy opened the One Piece manga, he learned about the future developments.

Everyone was suddenly awakened to find that the sea had become completely unfamiliar!

Navy Headquarters: All Rear Admirals and above, get the chance to open cans!

The four emperors temporarily put aside their grudges and reached a consensus: let's get our hands on the jar first!

The Five Elders held an emergency meeting: We must stop Xia Wen from selling the cans! We must maintain world stability!

When Im awoke from his slumber and learned that there were several Nika Devil Fruit users in the ocean, he felt as if the sky had fallen!

The strongmen who emerged from the jar shop all headed towards the sea, solely to spread the word about the jar shop's greatness.

Thus, a new legend was born on the high seas: "Better to offend the Four Emperors than the Jar Merchant!"

Now... it's the era of big can opening!

Telekinesis, extrasensory perception, hallucinations... An accident during an experiment brought Subject 11 to the world of Fairy Tail. ... "So, am I a psychic or a mage now?" Elivin pondered this pointless question, clutching his head. —————————————————————— No cheat codes, no system, no One Piece or Naruto cameos, just pure Fairy Tail fanfiction. I wanted to write a heartwarming and enjoyable Fairy Tail story. PS: I'm really bad at writing synopses, so check the comments if you're really struggling!

Transmigrating and immediately stumbling upon the Third Shinobi World War? A hellish start! To make matters worse, his identity is that of the Uchiha clan, which is destined to be wiped out in a few years?

Just when I was giving up and waiting to die, the system told me that I had memories of my past life and a [troop production system]!

Suspicion from Konoha's higher-ups? Danzo Shimura's conspiracy? Itachi Uchiha's executioner's blade? No! This so-called "Night of the Clan Massacre" is merely the perfect sacrifice for my ascension to the throne!

Konoha? Too small. The ninja world? Just the beginning.

The rules of the ninja world must be rewritten. I will take control of life and death in the name of the Uchiha and amass billions of soldiers.

From this day forward, I will stand at the top.

(Group portrait, behind the scenes, summoning, pirates)

He traveled through the world of One Piece and awakened the divine skill of manifesting fantasy characters and items.

Kamen Rider Kuuga storms Enies Lobby alone!

Digimon Agumon encounters a young Princess Vivi!

Spirit Detective Yusuke Urameshi (replaced by Raizen) transforms into a demon and confronts Aokiji head-on.

The omniscient and omnipotent Quincy King has descended upon Skypiea!

Multiple sun gods appeared in this world

Nico Robin, who became a Quincy, and Usopp, who gained Nen abilities, had their fates rewritten.

When fantastical characters from all over the world descend upon the world of One Piece, what kind of storm will this sea face?