One Piece: Unreal Adventure - Chapter 32: Coby

Gawain is dead and was transmigrated, but there was a slight problem during the process.
After floating for more than a hundred thousand years on a different continent, he felt that he might need a body to become a complete transmigrator, but he did not expect that…

- Description from Novelupdates

[Dimensional Magic Cube's Instructions][1. The Dimensional Magic Cube can automatically absorb the energy that exists in the dimension. Once a month, it can randomly open a dimensional channel and perform dimensional travel.][2. The Dimensional Magic Cube has the ability to convert various powers from different dimensions, ready to be activated and used at any time.][3. There is a storage space inside the Dimensional Magic Cube, which can be opened and used at any time.][4. ...]This is the story of a man who once couldn't choose his own future but vowed to live for himself in this new life.Carrying the Dimensional Magic Cube, Riezel arrived in the world of swords and magic and wandered through different worlds, hoping to find a new beginning.===In a nutshell, a story about a man from Earth who got transmigrated into a fantasy world (original world that act as the main world) and has the ability to travel to various anime worlds to become stronger.Visited Worlds:1. Danmachi (Is It Wrong to Try to Pick Up Girls in a Dungeon?)2. Demon Slayer (Kimetsu no Yaiba)3. ...

In 2030, an anomaly transpired, and aliens invaded the earth! At this age where the world was about to be destroyed, the top talents of mankind gathered from all over the world to develop a holographic game called Miracle. All humans on Earth would enter this game and battle against foreign invaders through holographic simulation. After Mike entered this game, he unexpectedly discovered that he could actually see all kinds of hidden information.

[Beginner-tier Exotic Beast, Level: 1, Status: Weak…]

[Boss-tier Exotic Beast, Level: 10, Status: Berserk...]

[Overlord-tier Exotic Beast, Level: 15, Status: Idle. Will drop a piece of SSS-grade weapon when killed... ]

[Old wooden crate with hidden SSS-grade equipment...]

From then on, Mike used the system to quickly level up in Miracle. Gradually, when he looked back, he had become the world’s greatest existence!

I woke up in my sleep, and a strange door appeared in my home…Behind every door is a strange world.

In the nightmare world, Jiang Cheng added the news from the strong man to the fat man, and he almost cried when he heard the latter, “If you die here, the whole family will stand upside down and bleed?”

“Is such that.”

“Then I don’t think you are too scared?” The fat man widened his eyes.

Jiang Cheng turned his head and said in a very formal tone: “Because I am an orphan.”

- Description from novelbuddy