Blackstone Code - Chapter 6:

As a sandbox game player who loves peace and farming, Chen Xiyi said that he is not the kind of fourth natural disaster that will bring chaos to the world, and he is good at influencing the enemy with truth and justice.

“If you have something to say, put away the weapons of mass destruction in your hands first, and you can discuss anything.”–The last words of a famous NPC.

- Description from novelbuddy

In the 5th year of Konoha’s founding.The battle between Hashirama Senju and Madara Uchiha at the Valley of the End had come to a close.In order to treat his elder brother’s injuries, Tobirama Senju resurrected a medical ninja from ancient times, hoping that this individual could prevent the injuries from shortening his brother’s lifespan.This medical ninja’s name was Emiya Shigen.

Twelve zodiac animals represented the months of the Lunar calendar. No one was aware,however, that these twelve representations were Guardian Gods. These twelve positions were passed down the twelve patron bloodlines. They possessed the ability of the zodiac guardians and silently protected the East.

In the East, the auspicious Qilin, possessing royal blood, descended, reigning over the Twelve Zodiac Guardian Gods, who devote all of their power into protecting the East.

A ruffian Qilin, an Earth that transcends all expectations, a legendary city, and the patronage of the Zodiac animals together create an unforgettable novel.

(Rat, Ox, Tiger, Rabbit, Dragon, Snake, Horse, Ram/Goat, Monkey, Rooster, Dog, Pig)

- Description from Novelupdates

This story is centered around the man named Yi Ji-Hyuk, who has spent 1000 years in a Medieval Western fantasy-like world before returning back to the modern-day Earth. When he returns, he finds that his home is facing monster threats, and that humans with superpowers have appeared to protect the innocent people of Earth.