Hell's Handbook - Chapter 406

Abandoned at birth in a humble stable, Shirone was raised by commoners—but he was anything but ordinary. Blessed with remarkable insight, he taught himself to read at a young age. A fateful visit to the city introduced him to the wonders of magic, igniting an unshakable dream of becoming a mage. Yet, beneath the city's dazzling facade lurked a ruthless social hierarchy, where power and privilege crushed those who dared to rise above their station. As Shirone uncovers the world's darkest secrets before even coming of age, one question remains—can he defy fate and claim his destiny as a mage in a world determined to keep him down?

The world that nurtured the civilization which reached the pinnacle of magic was on the verge of destruction.
The last survivor transmigrated to the past, when the magic civilization started growing, as countless mages were still fumbling their ways through the thorny paths of magic knowledge.
He, who came from the end of the magic era, aim to reach the pinnacle of magic.

- Description from Novelupdates

Superpowers descended upon the world. This was a world where everyone awakened to superpowers.

Some people awakened to abilities at the lowest F rank. They could only work the most difficult jobs for their entire lives. Meanwhile, some people started off with S rank powers and skyrocketed to fame.

In this age where talents determined everything, Ling Feng awakened the clone ability, which was ranked second last in the F rank powers.

The crowd mocked him, “That is one of the most useless talents. After one awakens this ability, they can create a clone of themselves. However, their strength is halved in the process. Aside from running errands and making deliveries, it is useless.”

However, very soon, Ling Feng discovered that something was off. That was because his talent could level up from the lowest F rank up to the SSR rank! He had unlimited clones and unlimited evolution!

Many years later, half of the superpower users in the world were Ling Feng’s clones.

Nagi who was summoned to another world acquired the「Skill Structure」skill.

Nagi felt the hints of black job from the king’s request 「To defeat the devil king」. He leaves the castle and starts his journey with a slave girl.

The small demon girl Cecyl, the melee-fighter beast girl Rita , Aine the onee-chan maid, Regii the cursed sword.

Rafiria the warm and fluffy elf and Iris the sea dragon shrine maiden.

Nagi rewrites the girls’ skills and made them into 「cheat characters」one after another.