[Endless battles, sea supremacy, aim for the strongest]

If Blackbeard had taken Luffy's Nika Devil Fruit, Ace had been rescued, and Whitebeard hadn't died at Marineford, what would the future of the world have been like?

On the eve of the summit, an unlucky soul who had traveled from another world was devoured and merged with Douglas Barrett.

The lives of the devil's heirs took a different turn from that point on.

"The Paramecia-type Fusion Fruit allows the user to arrange and combine any object, causing them to fuse. It can also fuse any inorganic matter it touches with its own body to create desired transformations!"

Cells can arrange and combine to become ultimate life forms, ever-changing!

The arrangement and combination of matter—this world is a sandbox game in your hands, and you are the creator!

Microscopic particles arrange and combine, hand-crafted nuclear fusion, devastating the world!

Impel Down is in chaos, a mad dragon emerges from the abyss, turning the entire Deepsea Impel Down into a ship to fight on the summit!

In the Marineford War, a Gundam was launched, and Marineford was sunk with a single shot!

In the new world, we will conquer all and let the name of the Demon God resound throughout the seas!

Bai Ye traverses the Swallowed Starry Sky, only to discover that countless versions of himself have simultaneously transmigrated to various corners of the Swallowed Universe, each with different identities, races, and starting points. Without any cheat codes, he can only rely on sharing the talents of his many selves to seize opportunities in different places, gradually becoming the strongest in the universe. Earth Bai Ye: I possess Earthling blood. Although my growth is slow in the early stages, as long as I survive until the extraterrestrial battlefield, I have a chance to obtain the Star Tower! Demon Bai Ye: I reincarnated as the "Time-Space Nightmare Beast," one of the eighteen royal families of the Demon Clan. Upon adulthood, I am already a Domain Lord, but I am caught up in a conspiracy, facing a life-or-death crisis from the very beginning. Insect Bai Ye: I reincarnated as an apprentice-level Shadow Insect, sent on a mission by the Insect Queen. I discovered that this Queen seems to be seriously injured; perhaps there is a chance to...

Jiang Yi transmigrated to the Douluo Continent, but his martial soul was still the most useless Blue Silver Grass, with no soul power whatsoever. What should he do? Although the Sun Moon Empire hadn't yet launched a war, and the Douluo Continent was at peace, everything was relatively calm. However, even without war, survival was still extremely difficult for a commoner without soul power. Just as Jiang Yi was worrying about his future, the customized achievement system awakened. "Host awakens Blue Silver Grass martial soul. Congratulations, host, you have obtained the achievement: Jiang Yi's Blue Silver Grass. Achievement reward: 0.1 level soul power." "Soul power didn't increase for a year. Achievement: Eternal Blue Silver Grass. Reward: Blue Silver Grass shows slight evolution." "Spending 5 years to break through to level 10. Achievement: The most stable soul master in history. Reward..." With these customized achievements, Jiang Yi gradually changed...

A country boy, full of dreams, stepped into the labyrinthine city of Orario, only to be quickly slapped in the face by reality. The city didn't welcome him with adventure and battle; Koya, without a familiar to take him in, was forced to work as a laborer for the Loki Familia. "So this is the hero I'm going to raise?" [Yes, Himeko-san.] "What are you for?" [I can do anything you want, and even things you dare not imagine. So spend money, Doctor!] "Mora? You only need Mora?" [Mora is all you need; this is our contract, Ningguang-san.]

Transmigrating into Harry Potter, he gains a system that allows him to grow stronger through learning. While young wizards are still struggling with the Levitation Charm, Rock has already mastered the entire Standard Spellbook. Hermione: "His notes are more complete than Mrs. Pince's!" The Weasley twins: "Great Rock! We call you the strongest!" Snape: "Potter! If your potions were even a tenth as good as his..." [Flicker] is maxed out to the Law level, a single [Radiant] Holy Light will crush any dissent. [Levitation] is maxed out to the Myth level, a wave of the hand [Universal Pull] will hold the stars in his palm. When Voldemort brandishes the Elder Wand, announcing his 'Return of the Dead', Rock looks at the densely packed, dazzlingly bright max-level skill panel and silently pulls out the wand he's swung countless times. "Tom, have you ever heard of a spell that falls from the sky... Expelliarmus?"...

(The rating has just been released, so it's rising slowly.)

“As I said, although I am from the Heaven-Defying Sect, I am essentially a person who adheres to traditional cultivation methods. I am not a heaven-defying god.”

"What? You're saying I practice swordsmanship every day without learning any magic or cultivation techniques? How can I become a strong person? Are you cheating?"

"Nonsense. It's all because I want to get closer to ordinary people. Don't talk about cheating or hacking. I'm not that kind of person."

—My Daily Life Cultivating in the Heaven-Defying Sect

[Under One Person + Mythical Beasts + Soul Rings + Leveling Up + Traveling Through Multiple Realms + Decisive and Ruthless Killing]

Zhang Xuanye transmigrated into the world of "Under One Person" and was born in Longhu Mountain, becoming a small black snake.

He was being hunted by the century-old Black Eagle and was unable to cultivate.

The game starts with a bound [Soul Ring Fusion] system, awakening the Nine Nether Dragon Vein!

Hunting down a black eagle and obtaining a hundred-year-old soul ring shocked the Old Celestial Master!

After two years of practicing the Dao, he angrily slew a great demon from the late Ming Dynasty and merged with the thousand-year-old Purple Ring!

A journey through the Northeast: breaking a demon sword, capturing a demon fox, and delivering a devastating blow to a ten-thousand-year-old black ring!

After the Luo Tian Grand Ceremony began, Zhang Xuanye kicked Zhuge Qing and punched Zhang Lingyu, shocking Na Du Tong!

As the Quanxing Sect attacked the mountain, Zhang Xuanye merely smiled disdainfully: "I still have eight more 100,000-year soul rings like these!"

Transmigrating to various anime worlds, Lin Yi is bound to a god-level sign-in system and starts his journey by parachuting into Demon Slayer!

Sign in at the Kamado house to unlock the Demon Blade Thousand Blades, unleashing a multitude of blades to slay all evil spirits; sign in at the Wisteria Forest to obtain the perfect inheritance of the Breath of the Sun, where the blazing sun burns away the darkness of night.

Starting from the world of Demon Slayer... In each world, he keeps checking in and getting stronger! Eventually, he becomes an unparalleled powerhouse spanning multiple anime series!

Having transmigrated into various anime worlds, Yu Sheng Qiuzhe obtains a god-level choice system. While walking the streets at night, he encounters a unconscious Rem, who is leaning against a corner. Out of a helpful spirit, he picks her up. Just then, a fierce shout comes from behind: "Let go of that girl!" "Ding! Master is about to face Tatsumaki's pursuit. Please choose!" "Option 1: Throw Rem at me! Decisively throw Rem at Tatsumaki while shouting 'Throw Rem at me!' Reward: 'Mystic Eyes of Death Perception!'" "Option 2: Kneel and beg for mercy! A true man can bend and stretch, knows when to advance and retreat! Reward: One bottle of Body Extension Potion (one-hour effect)!" "Option 3: Fight to the death! Never compromise or admit defeat until the very last moment! Reward: ..."