Rowan_Eternal

After saving one world from a Demon God and earning the trust and devotion of a perverted goddess, Sol is rewarded with all his powers intact and sent back home with the goddess accompanying him as his personal slave. 
 
That was supposed to be the end, the Demon God was supposed to be his last great trial. However, they are both summoned once again to an even more doomed world, almost immediately after returning to Sol's. 

This time around, Sol refuses his role as hero.

Unable to find rest, he turns his wrath to the pantheon of gods in a spiteful quest to become the strongest being in existence, followed by his slave who took his place as hero. 
Battles await, secrets of old begin to scurry into the light when the world as he knows it begins expanding beyond the visible horizons of reality and deep into the fringes of eternal darkness.

Terrible consequences lay beyond the borders of the known.

The World's most Overpowered Side-Character

"Ever since birth, the only thing that I have ever known is war." Xie began.

"Mhm," Sol nodded, locking in to the story and sitting there silently while the man recalled all of the major events that led to the demise of his home realm, the death of his family, the fall of the King, his descent into madness after watching the entirety of the world he knew burn.

The reason that Source seemed to have more peace than the Grand Collective was because they killed an entire realm in the pursuit of false peace and then the smaller clans and races joined together and suppressed the powerful, Godslayers were basically extinct there, and the Vatui had been forced into ruin.

Mercy is for the Weak.