One Piece: King of the World - Chapter 453: Operation Mania—Begin!

A man was transported to Ancient China and eventually became a servant of a declining household without a male heir. He utilized his wits and modern knowledge to help the household and eventually become trapped in the sea of political turmoils of the period.

- Description from Novelupdates

In 'The Elf Kingdom', the War of Gods 1000 years ago caused the fall of the World Tree. In a world where true gods rule, the fall of the elven civilization came soon after.A 1000 years has passed, the new World Tree is now reborn.Eve Yggdrasil, the Mother of Nature, the Goddess of Life, the Great Ruler of Elves, armed with the ability to connect to the Internet on the blue planet.He (yes, He) now must rely on players from the blue planet to help his goal of reviving the past glory of the elves and the World Tree.

“My turn, draw cards”

“It’s better to use this one if you’re fighting”

Looking at the card in his hand, Yue Si gave a villainous smile.

- Description from novelbuddy

The spiritual energy recovers, others practice, and Xu Bai upgrades.

After getting the game system, because I haven’t received the main mission, I frantically spent 22 years of experience points.

Then……

Xu Bai suddenly discovered that he was already invincible.

Practice exercises.

Full skill.

Everyone: “Why don’t you have a bottleneck.”

Xu Bai spread his hands: “What’s the bottleneck, click to upgrade, isn’t it enough?”

- Description from novelbuddy