Ichiban Ushiro no Daimaou - Volume 8, Chapter 4 — The Very Last Demon King

Summoned after an unfortunate accident in hopes they could protect the world from a coming threat, Ben and his classmates are gifted another chance at life. With fame and fortune promised to whoever is willing to fight for the sake of the world it doesn't seem like a bad deal, there's just one small problem. Ben wasn't blessed with any magic or combat skills, just crafting and enchanting. While the skills themselves aren't useless they also aren't seen as being necessary to the coming war. Now not needed and alone Ben tries to find a place in the world while meeting some of its colourful characters along the way.

In the age of the Warring States, the world is at war!

At this moment, a great empire is about to be established, and at this moment, this empire is at stake.

In this vast world, Young Master Qin shouted loudly, “I want this great Qin Wanshi–!”

- Description from novelbuddy

Otaku Tang Yi traversal obtains a systematic counterattack.

waste? You can still find your teeth everywhere.

Easily relax the artifact, simply become a master.

Daguai upgrade, killing also upgrade.

Crush the heavens and the world to achieve the invincible supremacy.

genius? In Tang Yi’s eyes, it was just a joke, not as good as a pet dog in the system.

- Description from Uukanshu