MTL - The Great Conqueror - Chapter 15 Fangs

Claire receives a strange dream the night before her 18th birthday, an unknown goddess offers her power as her paladin. This power comes with a “gift” Claire was not ready for, but if it means getting her brother back, then she'll master it. Join Claire and her party as they navigate adventuring, fighting against tyranny, and the gifts the goddess bestowed them.

He rose from abjection and achieved eternity in glory.
He embraced the prettiest beauties and killed the strongest opponents.
He was able to shift the clouds into rain and cover the sky with one hand.
He could overrun the entire world and go anywhere as he pleased.
He pacified wars and held the world in awe.
He was matchless in the world.
However, his hair turned white overnight for his beloved woman and he was on the verge of death.
He was surrounded by enemies who were trying to take his life.
He struggled his way to become mighty and fought for everything he cherished.
For this age, he was the only king of the Dark World.
His name was a byword for might.
As a man living in the world, his only ideal was to pursue brilliance.

- Description from Novelupdates

The hero who was killed by the demon king ended up reincarnated as the son of the one who killed him! Thus began the life of the hero who donned in the mask of the ideal demon prince to topple his own kingdom while doing his best to prevent anyone from discovering his identity―― But to do that and blend into the demon tribe society, he had to kill his former comrades. Nevertheless, to become stronger, to save humanity, he had to walk through all kinds of paths of carnage! This is the tale of the demon race’s fake prince destroying his own kingdom.

O Hero, Trample Those Who You Should Protect!

TN: Most part of the other character in the novel is depicted from a non-human perspective so expect something that is completely different from the common sense of human.

The empire encompassed endless twinkling stars, but in this dark and terrifying distant future, there were only endless wars.......Gu Hang became the governor of a wasteland planet, where previous governors had all been executed for failing to deliver the tithe on time.Monsters and Low Energy Storms rampaged, survivor factions schemed against each other, technological regression, low productivity, the resurgence of Evil Gods, Green Skin Orcs taking root and sprouting...“Don't panic just yet, let me check the panel below.”[Military Tokens], [Heroes], [Technology], [Events]...Starting as the planetary governor, he would build fleets that traversed the Star Sea, suppressing all alien forms, heretics, traitors, and demons of chaos!Although I formed battle groups on my own, funded Battle Nuns, diverted the imperial tax, and disregarded deployment orders... I knew I was fiercely loyal!Traitors? This is clearly the Third Empire!