My Servant Is An Elf Knight From Another World - Chapter 79

“A modern online novel writer who had been struggling finds themselves transported into the world of One Piece, becoming a 10-year-old child.After a series of events, Ryuen arrives at Cocoyasi Village. The protagonist possesses the Tori Tori no Mi (Bird-Bird Fruit), Mythical Zoan type, Phoenix form.After undergoing a rebirth (Nirvana), the protagonist's transformation no longer involves turning their hands into wings, and the fruit's power becomes even stronger!From the moment they reach Cocoyasi Village, the protagonist and Nami embark on an adventure, traveling from island to island, indulging in food, drink, and fun. Along the way, they also help the poor by taking from the rich, because, after all, Bellmere’s family is still...”

This is a world where a king is the most powerful.

Being a king make you can travel through the world and choose the strongest people in the sub-worlds as retinues

As long as countries are established in different dimension spaces, they can integrate their resources, land, civilization, and cultivation system into their own king’s world to expand their territories and accelerate the process of civilization.

Qin Yi soon discovered that these dimensions were familiars to him from his previous life.

in Naruto s world, the integration of ninja civilization, the whole people are ninja. into bleach world, conquer the world, expand the world map let the world evolve into a shinigami civilization.

Is this just finished? No, everything is just beginning!

Dragon Ball, journey to the west, Marvels, Pirates, all the sub-worlds, is the nourishment of the King’s world civilization!

The first subject he met was Gandalf

The first world is Naruto’s.

- Description from Novelupdates

In a world where magic is a science, Siobhan is a genius.But even geniuses need schooling.When Siobhan stumbled into the theft of a priceless magical book, she thought her dreams of becoming the world's most powerful sorcerer were destroyed.But then a mysterious spell changed her life forever...Siobhan is now wearing the body of a strange man and has a new identity—Sebastien. With a new chance for a new start, she allies herself with a local gang—secretly a revolutionary party funding itself through crime. Now, she is bound by vow to repay them in magic and favors. But as Sebastien's reputation begins to bloom, and Siobhan's old enemies still lurk in the shadows, she quickly realizes that the secrets of this world are deeper and darker than she ever could have imagined.Forced to juggle the two sides of her double life, Siobhan is determined to uncover the truth and take control of the name they gave her - The Raven Queen.

Sky is not born of Shen Huan, millennium is like night.

This is a rebirth who wants to release himself, and has an interesting life story after getting a less serious system.

- Description from Uukanshu