On the battlefield, the Avengers were locked in a fierce battle. Just as Thanos was about to win, suddenly, a loud bang was heard in the sky, and a huge warship that blotted out the sun appeared above everyone's heads. A man stepped out of the open hatch of the warship.

Who are you?!

Thanos sensed unease and shouted loudly.

"You ask who I am?"

The man had an air of arrogance and disdain for the world.

"Listen up, I am the Doctor of Rhodes Island, the Admiral of the Naval Base, the Master of Chaldea, the Commander of Griffin, the Onmyoji of Heian-kyo, the Knight of Princess Connect, the Dress-Up Master of Miracle Continent, the Operator of Rainbow Squad, the Commander of Punishing: Gray Raven, the Duelist of Duel City, the Crying Demon Hunter, the Demon Hunter who collects Gwent cards, the Ash Without Fire, the Ash Lord of the Fire Keeper, the Outer God Exterminator. The one who cuts down the undead. The Dragonborn of Skyrim, the God of War who slaughtered the gods of Olympia and Asgard. The Assassin who has nothing and does whatever he wants, the cop of Raccoon City, the ruler and protector of the Borderlands, the King of Elden, the Highlord of Azeroth, the Warrior of Arad, the Summoner of Valoran, the Defender of Crossfire, the Mercenary of Kohan..."

A virtual reality game based on the Warhammer Universe, boasting a high degree of freedom and incorporating multiple well-known IPs, has become a viral sensation online. Dutch, drawn by its popularity, has also become a player. Little does he know, the game has just begun, and he has already been transported to the real Warhammer Universe, becoming the sole player. Guilliman: Dutch is an excellent warrior, but he doesn't like to listen to people. Every time I give him a mission, he skips it. Talassien: I'm curious how he manages to break stars into blocks. Tau: For that guy, physics doesn't exist. Khorne: That bastard built a giant pillar, saying he'd use it to break me. Nurgle: He kidnapped my children, washed them clean, and that humiliation fills me with grief and anger. Tzeentch: All changes are part of destiny, but that bastard shattered destiny. Slaanesh: Actually, I've already corrupted Dutch, but I dare not tell him. ...Dutch: Forgot the beginning, forgot the end, anyway, let the warp burn. Emperor: Support, 666.

Chang Kun unexpectedly obtained the Creator System and became a candidate for Creator. Afterwards, he created a primordial world, a technological world, a magical world, a world of immortals and heroes…

[Transformation] Takuya wakes up to find himself in another world, Japan, transformed into the white-haired girl, Tower Diana. His determination to overcome difficulties allows him to quickly adapt to this change. Then, on a bright and sunny afternoon, in an effort to apply the idealistic Japanese youth lifestyle gleaned from manga, he confesses his feelings to the school's unattainable beauty, Yukino Yukinoshita, but is rejected… What will become of the disheartened white-haired girl…? Seeing the white-haired girl gradually surrounded by others, an anonymous Yukino thinks: I'm starting to regret it.

Fatti, transmigrated to the world of DanMachi, starts with a fully-equipped arsenal of three magic spells and seven skills. Unfortunately, his potential is extremely limited, preventing him from seeing further. It's only after accidentally discovering a hidden treasure chest function that his life takes a dramatic turn. He opens invitations to recruit familiars from other worlds, acquiring various magic books and transforming himself from a mage into a noble sorcerer. With the goddess Demeter as his backer, he secretly accumulates strength, manages his familiar, and quietly develops his power. From then on, he cautiously and steadily begins his fantastical life in this other world.

"Why does your Gengar look so holy? There's even holy light shining from it?" "Because it believes in Buddhism!" Bian Xiang said solemnly. "What's wrong with your Froslass? Why are its fire moves ineffective?" "Because it has Buddhist light in its heart!" Bian Xiang's expression became even more solemn. "Alright, Team Rocket members, either I'll deliver you from suffering, or I'll convert you!" "You choose one!" Bian Xiang, the most Buddhist Elite Four member of the Pokémon League...

Veteran card player You Ling transmigrated to an elven continent where card playing reigns supreme. Watching the axe-wielding duels, You Ling initially thought he could easily become the world's dueling king. However—[Because you lost your body before transmigrating, you can only reside in another person's body as a soul.] Women only slow down my card-playing speed! But why am I only able to become the card-playing spirit behind these women? Aisha: "I summon Youyou in attack form." You Ling: "Are you stupid? How can you summon a mortal with 300 attack power in attack form?"

A proficiency certificate that lasts forever! A system that allows me to traverse countless worlds! I lack nothing now! In Dr. Stone, the Sword God of Ten Mile Slope, the Wilderness Gourmet, I took my first extraordinary step to save a lost civilization. In One-Punch Man, he extended an invitation to unemployed office workers: "Want to become a savior hero?" In the Biohazard world, a man and a panda roam the apocalypse: "Dragon Warrior? Savior Hero!" In Ling Cage, Battle Through the Heavens, and Mortal's Journey... step by step, he has come a long way, and in countless worlds, everyone praises him as the supreme and holy savior. But only Lin Hao knows that all of this is due to his own hard work and sweat! System! Proficiency! Give me 1000% support!

(Multiple female leads + slow-paced development + occasional lighthearted and humorous slice-of-life scenes)

(This book is also known as: Is Yingmei really me?!, I'm playing Genshin Impact?, Everyone in Teyvat! Lend me your power!)

I am Su Bai, the transmigrator who traveled to Teyvat and was surrounded by beauties. Even my slovenly blonde aunt Yingmei is me!

Furthermore, it awakened the Genshin Impact game system, allowing it to become stronger by deeply participating in Teyvat events and making wishes to obtain rewards!

Holding countless intertwined fates in their hands, Su Bai and Ying Mei looked at the female characters from the game and smiled kindly at each other.

Su Bai: Ying, I have a preliminary idea.

Ying: Su Bai, me too. Forget the flight attendants, the ladies are the real focus of my journey!

Good news, I was killed by a train at home.

Even better news: he's become the navigator of the train.

Even better news is that you can travel to the world of anime by train.

What pioneering and interesting things did you do after becoming a navigator?

She was paired with Kirito.

Adopting Lolis from All Over the World

Discussing the relationship between monarch and subjects with a famous queen

The birth of the king was celebrated with a cannon salute; God was lured onto a train; and Shiori almost fell in love with him.

Do these count?

Worlds experienced: Sword Art Online, Black Bullet, Akame ga Kill!, Date A Live, High School DxD, Guilty Crown, Academy Battle, Accel World...

(P.S.: The world-building is mostly from older anime series, with fewer newer ones.)