The Elite Assassin Becomes a Flat and Ugly Nerd! - Chapter 20

This is a world where everyone participates in simulations, amidst an eerie apocalyptic setting.Only by performing a Heaven-defying Fate Change in the simulated life can one avoid being consumed by the black mist.Lu Yuan crosses over accidentally and gains an Adaptive Talent, receiving a Divine-level Talent automatically in every simulation!First Life: A modern technology world where Martial Dao is in decline.[Heaven Rewards Diligence]: With every bit of effort, reap a hundredfold reward; even breathing makes you stronger!Second Life: A Magic World, reincarnated as an ordinary skeleton.[Undead Calamity]: Transform into the Undead Dominator, using the Catastrophe Legion to battle against the Abyss Demon!Some Life: Parasitic cultivation, where cultivators are reared by the Insect Race.[Heaven-defying Comprehension]: Deduce the Gu Dao cultivation system, becoming the first Gu Immortal in history!As each Divine-level Talent is activated, the Gods and Demons finally discover in terror…

The journey to the martial peak is a lonely, solitary and long one. In the face of adversity, you must survive and remain unyielding. Only then can you break through and continue on your journey to become the strongest. High Heaven Pavilion tests its disciples in the harshest ways to prepare them for this journey. One day the lowly sweeper Kai Yang managed to obtain a black book, setting him on the road to the peak of the martials world.

- Description from novelupdates

Once upon a time, a hero had been summoned to a different world in order to defeat the demon king. After the war stretching 3 years ended the commendable hero slew the demon king. And he was forcibly deported back to earth after being dismissed.

Such bullshit!

Elves in addition to beast race, dwarfs and demon race. Even though I wanted to make a harem in the different world I saved! My dream will not come true on earth, where there is no magic at all. Thus, the hero returns on his own. Without the blunder of being extradited to earth this time, he will build a harem of his own in a different world.

The Halfling says: curiosity is power.The Dwarf says: unity is power.The Elf says: Magic is power.The Gnome says: creation is power.The Beastman says: slaughter is power.Humans say: authority is power.The Dragon always says: knowledge is power.The Gods once said: faith is power.Lynch stands on the terrace of the All-Knowing Tower, overlooking the Anriel Continent, and gently says:“I”, am power.