MTL - One Piece: Wudang Baiye, Deputy Captain of the Straw Hats - Chapter 428

Yeon-woo had a twin brother who disappeared five years ago. One day, a pocket watch left by his brother returned to his possession. Inside, he found a hidden diary in which was recorded “By the time you hear this, I guess I will be already dead….”

The world experienced a cataclysmic change, and countless spatial gateways appeared out of thin air.

Exotic beasts of all shapes and sizes swarmed out of those aforementioned spatial gateways, forcing the humans to face the crucial moment for their survival.

In order to search for a chance at survival, brave warriors from the army and scientific researchers risked their lives and entered the world beyond the spatial gateways. To their surprise, they discovered that there was a chance of obtaining beast cards by killing these exotic beasts in their world.

Those with extraordinary spiritual strength are able to utilize the beast cards, perhaps transforming the cards into the beasts’ combat bodies while they were still alive, or transforming them into weapons or defensive gears, or…

A new occupation came into existence following the changes, known as beastmasters.

A transcender with two souls fused into one found himself in this magnificent new world full of waves, rising step by step as he ascends into the seat of a godly beastmaster.

- Description from Novelupdates

____this story sets in Japan that developed a little different history from yours.

This is how a Japanese Princess relieves her stress of the day by using the latest VRMMORPG, and while playing the villain there, the first town turns into whirlpool of chaos, smashed the underground organization in one hand and went for a coup. It’s literally a playtime diary of a girl who is called as “Genocider-san”, “Roaming Last Boss”, “A different person plays the game”, “Raid Boss”, “Ruthless”, “Calamity”, and such by the players.

Unlimited opening, unlimited power! The mutated mobile phone has a magical app download! All kinds of buildings, can rise to the sky, can sneak into the sea, can be hidden… hidden secrets of the big!

Tang Zhen’s ability to build a city is… Building a city, playing with explosives, crushing the ground and grabbing the ground.

Tang Zhenduan sits on the top of the mountain, and at his feet is an endless floating city, guarded by dragons, surrounded by angels, and countless giant guns stand in the sky!

In the depths of the ocean a million miles ahead, it is another big 6-level building that is waiting for his conquest!

- Description from MTLNovel