Don't get fool by the prologue, it has nothing to do with the current story (Ch.221 ATM)
MC suffered incredible homesick and value memory as precious as treasures, he even refused to gain the 1000th blood vein because it will replace his scar, the only thing he has back from his tribe.
He once manipulated naive boys to go up against each other and killing all of them to finish his grand plan of annihilating all powerhouse there to rule it for his resource and to create a fate-related treasure.
The entire universe and everything in the end (Except for the Moon World) is just a simulation that somehow the "future" human creates and the things inside can "magically" come out to the real world.
Firstly, the main plot is to go to save the foreign planet, so the MC and human go all the way to this planet, then out of nowhere, f***ing Japanese (Really?As expected from a KR author.) evil overlord want some oil from the planet which btw is useless because the dungeons have something much better.
Powersclaing in this novel is way Over The Top with every fight the worlds are destroyed all the time.
The minor completion of one of the best physique, make MC fist weight 1000 mountains. This is without any Qi or any skill to back it up, just pure Brute Force
Also, MC arrogant pierce the heaven, if he can change it to power, he will instantly become the strongest for all eternity.