MTL - Dark Game, Draw the Talent of Almighty Power at the Beginning - Chapter 244 The power of the king - enfeoffment

He became a teacher at the best magic academy in the empire.
….For being mistaken for someone else.

Lynn traveled to a magical world similar to the European Middle Ages but possessing magical powers.

Here, magic can affect and control elementary particles.

So…a scientific theory is a magic formula!

Wizards called spellcasters who are actually scientists, under the siege of the Holy See, struggled to explore the truth of the world, until the arrival of Lin En, which set off a renaissance of an alien version…

(PS: The 2 million-word work “Hogwarts Bloodline Wizards” has already been completed, and the quality is guaranteed!)

- Description from novelbuddy

The story is about a a hitman, Who dies because of his own recklessness and transmigrates into a game he used to play after his retirement as a hitman.I'm not gonna spoil any further, but i might answer few of your questions.Is MC overpowered?Nope, he'll become strong over time and all battle he'll fight will be because of his effort and techniques.Is there magic and adventure?Yes! It have both magic like normal isekai with adventure and fighting with monsters and many other things. There are other important things like “Essence Stone” But let's talk about it in the chapters.There will be harem?Not really, He will be in contact with many beautiful female and males but one waifu but i haven't decided yet.All i can say is, give it a try, I'll try my best to make it worth your time.

A single distrustful phone call to the authorities led Ling Ke, who had crossed over to the eve of the Third Honkai Eruption, to endure years of torment as a lab rat.By now, the Crimson Herrscher had already “transcended,” Kiana was with Anti-Entropy, Mei was with World Serpent, and Bronya had long since reunited with Seele...As for Ling Ke, he had become the Herrscher of Dominance, commanding a thousand puppets.“From this moment on, I will exact my revenge upon this world!”The once ordinary Chinese man who had crossed over into this world, now completely consumed by darkness, revealed a terrifying, twisted grin.A forewarning—this is not a happy story.