He Lang accidentally obtained the Adventure System of the Universe, and from then on gained the ability to travel through the universe.

From The Great Ruler, Tomb of the Gods, The Legend of the Great Desolate World, Primordial Desolation, Ever Night, and The Swordsman in the Snow, he journeyed through world after world, pursuing the true meaning of the Dao. (This is just a rough outline.)

Having traveled to the moon in the One Piece world, Char Aznable, after five years of silence, awakens his omniscience and omnipotence, leading a space pirate crew to invade the Grand Line!

Char decides to recruit the Seven Warlords of the Sea first, but then Shanks and Kizaru suddenly appear, leading to a perfect start!

"Kizaru under Lord Char's command! On April 1st, 1520 of the Sea Calendar!"

"Successfully recruited Admiral Akainu into the organization! Bonus: Double salary!"

"Akainu and Kizaru, you performed well during your undercover work, your salaries will be doubled!"

Upon hearing Robin's report, Kizaru's expression became exaggerated, and he grinned, "Oh, in a couple of days, we'll recruit Kuzan and Sengoku into the organization. Once their salaries are paid, we'll take down the Four Emperors."

Drink the strongest liquor, recruit the most powerful henchmen, and steal the most beautiful women!

Char, in the name of the Empire, declared to the World Government: This world is mine!

The Holy Land of Mary Geoise was reduced to ruins, the Five Elders died in battle, Im was on the verge of death, and the Celestial Dragons were enslaved. The supreme power that had stood for eight hundred years became history!

empire.....

Two years ago, Yoru transmigrated to the western continent of the Fairy Tail world and activated the attribute-collecting system.

Whenever a mage casts a spell, the system will drop magic power and magical attributes.

Ding! Congratulations, host, you have gained the Time Magic attribute.

Ding! Congratulations, host, you have acquired the Flame Dragon Slayer Magic attribute.

Ding! Congratulations, host, you have gained the property of materialization magic.

…

Two years later, Yoru arrived in Ishgard with Irene's additional magical attributes, Neinhardt's materialization magical attributes, and Brandish's shapeshifting magical attributes.

When Ye Yu activated Brandish's shapeshifting magic, Mira, Erza, and the others exclaimed: Wow, it's huge! ...

There is no such thing as a peaceful life; it's just that someone is bearing the burden for you. Behind the scenes, where the light cannot illuminate, heroes are fighting bloody battles. [A List of the Top Ten Behind-the-Scenes Heroes of the Myriad Realms] No. 10 Demon Slayer Corps: We, the Demon Slayer Corps, will live forever until the day Demon Slayer dies. No. 9 Night Raid Team: We are all professional assassins. No. 8 Straw Hat Pirates: Nika and Luffy ignite the summer. No. 7 Dragon Slayer Lu Mingfei: We are all little monsters... No. 2 Emperor Ye: He quelled the turmoil, destroyed the forbidden zone, and suppressed all enemies in the world. No. 1 Desolate Emperor: A young man born in the Great Wilderness, destined for greatness, he reigns supreme for eternity. When the life of the Desolate Emperor is revealed, the myriad realms are shocked and moved to tears.

Shen Lang, carrying the "Divine Elephant Suppressing Prison Technique," transmigrated to the world of "Covering the Sky." Just as he was about to bring a small shock to the people of "Covering the Sky," he was suddenly pulled into a chat group. The chat group was full of himself. Shen Lang was dumbfounded. It turned out that he was not only the protagonist of a fanfiction with cheat codes, but also a transmigrator? Even more incredible, in each world, in addition to the chat group, he also had cheat codes. Shen Lang in "Swallowing the Stars": Borrowing the Martial God, borrowing the Fruit of the Future, obtaining the Great Success Method, enjoying the results first, and making up for the cultivation later... Shen Lang in "Battle Through the Heavens": Virtual space, simulated cultivation, becoming a top alchemist in one second, adding points to become a saint! ... Xiao Yan, Luo Feng, and Ye Fan were all dumbfounded: "Holy crap, there are cheat codes!" This chat group can also travel to the worlds of other group members? "Fanzi (Fengzi, Yanzi), bro will take you to a dungeon..." (Currently, the world is tentatively set as...)

Jiang Chen transmigrated to the world of Under One Person, only to find himself becoming the catalyst for the Medicine Immortal Society's Gu-making, his life hanging by a thread.

Just then, he found himself suddenly added to a strange chat group.

And the member in the group was actually himself, who had traveled through billions of worlds!

As a result, the art styles of each world began to become strange.

He trained to the extreme in the Demon Slayer world, achieving physical perfection and tearing apart the Demon King Muzan with his bare hands.

In the Genshin Impact world, the Three Corpses transformed into a Buddha atop the God's Peak, and with a single palm strike, the Cult Academy was blasted away.

Build a supermachine factory in the cyberpunk world, crush Adam's Hammer, and completely collapse the Abandoned Board Corporation.

In the world of One Piece, he becomes the Mountain Bandit King of the East Blue, transforming into a giant of light and standing atop the Holy Land of Mary Geoise.

Become the creator of a brand new magical fighting style in the Harry Potter world, stepping on Voldemort and punching the pink toad, showcasing the charm of magic.

. . .

Transmigrating into the world of the "Hakoniwa" (Little Garden) in the world of crossover anime, Izayoi Sakamaki, while waiting for her invitation to the Little Garden, was invited to the Multiverse Chat Group and became its strongest member. Esdeath: "Izayoi, I will definitely not let you leave me too far behind!" Rikka Takanashi: "My contractor, following the ancient oath..." Nagatsuki: "You are hundreds of times stronger than the True Ancestor!!!" Touhou Project: "Um... Boss, do you have any extra Third Star Particles? Can I borrow some?" Gilgamesh: "I, the King, declare you the strongest!" Brunhilde: "Lord Izayoi, please save humanity!" Izayoi Sakamaki: "Thanks for the invitation, just arrived in the Little Garden, challenging the Celestial Theory." With her absolute power, Izayoi Sakamaki also became the chat group's sole administrator...

My dad is the leader of the revolutionary army!

My grandfather is a naval hero! A close friend of the Admiral!

I fought back and forth with the Saiyans!

I, the Movie, King Luffy!

Who dares to kill me! Who dares to kill me! Who dares to kill me!

…

The time traveler became King Luffy and chose not to eat the fruit representing destiny. He thought he had a prominent family background and was well-known all over the world, but...how come I, Luffy, have a childhood sweetheart?

The good and passionate manga seems to have suddenly taken a turn...

Yun travels to the world of pirates.

At the beginning, he faced the life and death selection of the Rocks Pirates.

Fortunately, I have awakened the golden finger: my comprehension is beyond belief.

[Through eating, you gain insights and comprehend the Cell-Eating Art.]

You watched Kaido display Armament Haki and Observation Haki, and suddenly gained an insight. You learned Armament Haki and Observation Haki... Through deduction and creation, you successfully created Armament Haki: Divine Armor and Observation Haki: Divine Sense.

[You awakened Conqueror's Haki...successfully comprehended Conqueror's Haki: Kamui, and created a Conqueror's Haki training method.]

[You consumed the Shadow-Shadow Fruit, triggering a sudden burst of intuition and realizing the fruit's hidden power... You developed the Shadow-Shadow Fruit's ultimate hidden form—the Shadow-Shadow Fruit, Mythical Beast, Darkin King form.]

[You create a Devil Fruit fusion...]

Devil Fruit Fusion, Devil Fruit Evolution!

The pinnacle of physique, the ultimate dominance, and unparalleled swordsmanship!

With his extraordinary understanding, Youen created a different world of pirates.