Mecha Demon Slayer

A steel tide surges as demons run rampant. Zhuge Yao is reborn at eighteen and resumes his journey to slay demons. On the Morning Star, a mecha empire is fighting off an invasion by another civilization of magical beasts. Just as it teeters on the brink of defeat, a hero emerges like a savior.

With the grand goal of punching a demon-god-level berserker into the ground and kicking down a million-strong wave of fiends, he climbs aboard a mecha once more.

He overcomes every obstacle, fights without cease, and rapidly grows stronger. After crushing one enemy faction after another, he develops his military forces and successfully revives his family. When a million magical beasts come surging in, he unleashes Steel Tide Mode and leads the empire to victory.

Might makes right. If words fail, fight. Fighting is how strangers become friends, and the more you fight, the faster your strength rises.

At first, I only had the strength to smash one layer of stone? No problem. I can still beat up a werewolf strong enough to smash three layers of stone.