In a National War, You Won't Give Me Grenades, So I Make a Mech with My Bare Hands?

The war between all races has begun, and no one can stay out of it.

Zuo Lingchen transmigrates into this world and becomes a builder of advanced weapons.

With the Way of Simplicity System, he can create a weapon instantly by using a blueprint.

He can also spend contribution points to enter an advanced-brain state and run countless experiments.

"At first, I only wanted him to build a few grenades. I didn't care how powerful they were, as long as they made a loud bang."

"And then?"

"Then our mecha warriors stood at the summit of the battlefield between the races."

"Wait, you have to tell us what happened in between, too!"

This novel and its characters are entirely fictional. Any resemblance is purely coincidental. Do not imitate.