From A Stronghold NPC To The Final BOSS - Chapter 1033 - : No way out

He is the ruler of the mercenary realm, an overlord that gives headaches to the leaders of any country! For the sake of his friends, he’s willing to sacrifice himself; for the sake of his family, he does not hesitate to spill blood! He is a dragon, one that soars above even the highest of heavens. He’s a power that advances triumphantly through unstable situations, stirring up both the winds and the waters.

- Description from Novelupdates

Even though Gu Yunxi was created from the accumulation of the resentment of souls, there was not a bit of ruthlessness nor cruelty in his nature, only a desire to cultivate. Just as he achieved his human form, he was sent to reincarnate. Under the control of Heaven, he experienced life after life of suffering, dying a terrible death every single time. After thousands of reincarnations, thousands of terrible deaths, he finally accumulated enough power to escape from the Laws of Heaven. He swore to get revenge on this blind Heaven’s Law that’s unable to differentiate good from evil.

So what if it’s the Heavens? He will stir up the rights and wrong, the good and evil!

You want me to accept this life and die, but I just won’t! I want to live, to rebel against the heavens, to reverse this joke of a destiny!

- Description from Novelupdates

On an ordinary day, an inventory livestream descended upon the dimensional multiverse. Those who were selected all had a faint blue light screen appear before them.Immediately after, large characters appeared in front of them.《 Dimensional World Inventory — Top 10 Famous Scenes 》 Scene 1: One person, one sword, guarding a city, battling seventy thousand...Scene ***: The man who almost kicked out the grand finale, Eight Gates Formation! Might Guy!Scene ***: Menma, I found you!Scene ***: .....As one scene after another of regretful characters appeared, everyone watching the scenes shed tears.Monkey D. Luffy: That's amazing, one person, one sword, not only fought against seventy thousand people, but also returned alive?Uzumaki Naruto: I didn't expect that seemingly ordinary guy to be so powerful!Uchiha Sasuke: The one who made the final save was actually you.Jinta Yadomi: Menma, we found you~Everyone: Menma, we found you~Honma Meiko “Menma”: Hi! I've been found!

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

And then, he became a war hero.