MTL - Take a Husband for Farming - Chapter 534

In the Da Li Dynasty, there exist humans, demons, ghosts, and deities.The court oppresses cultivators, while monsters run rampant in the world, causing suffering to the people.Li Fan, under the command of his master, leaves the mountain to slay demons but finds himself caught in a great storm of events.-------------------As the sword leaves the mountain, the world trembles.I have nine swords, each with its own spirit!

Follow Chen Ming as he accepts disciples, establishes a sect, and fights his way in a world that deems him a cannon fodder.
He goes against any common sense using his wits and novel knowhow to finish missions and arm himself against his cruel fate.

- Description from Novelupdates

Noah Weaverheart was nothing but a poor boy with zero talent in Magic.Stuck at the Apprentice Magus rank for years, he was bullied and looked down upon by everyone in the academy.His pathetic life met an end at the hands of an arrogant noble, who decided to bury him and go about his day like nothing happened.However, as he drifted in between the space between life and afterlife, a set of notifications appeared before Noah.[Suitable Host Found!][Initializing The Supreme Magus System!][…][ERROR! ERROR! ERROR!]Before he could understand what was going on, he found himself jolted back to life, but the notifications wouldn’t stop flooding his vision.[A bug has been discovered in the system!][Trying to fix bug…][Fixing Bug…][…][ERROR! FIXING FAILED!][ERROR! SYSTEM FALLING APART!][…][ERROR! BUG UNABLE TO BE FIXED!][The system has been corroded by the bug. All parameters broken down. Required EXP for leveling up now fixed, limits on quests completely removed, Penalty on quests disabled.]At first, he thought it was a disaster.Then he realized—this bug wasn’t a curse, but a huge blessing in disguise!With no restrictions holding him back, Noah could now level up endlessly—faster and stronger than anyone alive.From worthless trash to an unstoppable force, he would rise above all… becoming the most powerful magus in existence!But the more he learns about his broken system… he realized the bug might be something far greater, and far more dangerous than he ever imagined.

After experiencing heartbreak from being abandoned, he enlisted in the military.

And then, he became a war hero.