Butcher Demon - Chapter 187:

The older young Lisko woke up and found that he had become an American. He took over his father’s ranch and began to live in the United States.

- Description from novelbuddy

Mortimer Zhu is an extremely unfortunate high school student who accidentally enrolls into an academy of a dubious nature, where it is the norm to jump in front of moving trains, get dismembered during orientation, and crushed by vindictive bouncing classrooms. Can he stay alive or will he die from the rigors of school? Why have evil spirits suddenly acquired a taste for his flesh?

- Description from Novelupdates

Seemingly as if they were waking up from deep slumber, billions of people transmigrated to the Divine Tree Realm.

They now had to plant Divine Trees and produce divine fruits to awaken their supernatural abilities? So that they could fend against the Netherworld invasion!?

Every Divine Tree Master would randomly choose three talents.

Enoch discovered that he could see hidden talent information.

[Hundred Times Amplification (Class: SSS)]: Sunlight Absorption x100, Growth Speed x100, Production Speed x100...

[Fruit of 10,000 Worlds (Class: SSS)]: Your trees could bear Demon Fruits, Cultivation Method Fruits, Life Fruits...

[Spring Rejuvenation (Class: SSS)]: When you produce fruits, you can bury them to grow additional fruit trees. The fruit harvest during the spring season of the following year will be x100!

Choose three ultimate SSS-class talents, and start from zero to grow little saplings into the trees of the world!

Devour the fruits of the world, and become the Supreme Overlord! Command an army of millions and conquer the entire Netherworld!

Everyone would soon realize that Enoch seemed to be playing a different game from them!

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.