Summoners War: Only I Summoned Divine Beasts - Chapter 1182: Five Enemies

Chen Sha came to a world of immortal martial arts and was ordered to take charge of the world’s first sect.

Before his death, the previous chief told him:

“If you don’t become the best in the world for one day, you are not allowed to go down the mountain for one day.”

So he closed himself in painstakingly, crossed the heaven gate in his body, and faced off against the ancient and modern powerhouses…

…

Many years later, Chen Sha recalled the day he went down the mountain,

From the moment he descended the mountain, he was number one in the world.

In the next ten epochs, any gods and demons have returned, immortals and Buddhas have lived in the world, ancient powers and ancient gods have appeared one after another.

No matter how the times change, he has always been No. 1 in the world and has never changed.

- Description from novelbuddy

In a monstrous post-apocalyptic setting, this is a story of how a lowly Inventor, Lance, conquered a nation governed by immoral group of Scientists called The Corporation. He grew and climbed up to the highest rank possible as a Scientist with his inventions and side businesses. Eventually, he became a weapons inventor, building weapons to two opposing sides. In doing so, Lance always crossed a dilemma. How could a nobody topple the most powerful government? How could one overcome circumstances beyond his grasp, especially in a world filled with monstrous mutations called the Abominants?

In 1892, in the Scottish Highlands, Hogwarts Castle.Just as the freshly graduated William Richard “reluctantly” accepted the offer from Headmaster Blake to take the job of teaching Defense Against the Dark Arts—he traversed through time once again and found himself in London a hundred years later.Upon receiving another owl from Hogwarts, he didn't hesitate much, and to continue learning his beloved magic, he once again enrolled as a rare fifth-year transfer student at Hogwarts over the past hundred years.Albus Dumbledore: Although I don't know why William keeps murmuring things like “I held you when you were a child,” putting that aside, he really is a diligent and studious good child.Sorting Hat: Az— Mmm...Tom Riddle: Shut up! How dare you call that great one's name directly?Harry Potter: Though Mr. Richard said he uses Unforgivable Curses as lighting spells and has built a tower of troll and goblin heads, I believe he must be a good person.

A protagonist reborn in another world.