MTL - I Made Scientific Magic - Chapter 136 low of universal gravitation

Traveling through the fantasy world, after hundreds of years of tossing, Han Li, who is of mediocre aptitude, is ruined.

After going down the mountain to marry a wife, he found that the way he opened the fantasy world was wrong.

You can rise from lying down, why should you practice hard, fight and kill?

Many years later, a long-lived family quietly rose up, with tentacles all over the heavens and worlds, and behind the scenes they controlled the various holy lands and immortal mansions.

On this day, Han Li was high in the ninth heaven, looking at the billions of descendants below, telling his glorious history.

A fairy emperor came across the border, intending to destroy the Han family, but was killed by Han Li with a snap of his fingers.

Immediately, the heavens were shocked, that ancestor Han was so strong!

【Longevity Flow + Family Flow + Goudao Flow】

- Description from novelbuddy

In the twenty-seventh year of Hong Guang, the allied forces of seven nations invaded the Great Blue Dynasty.Rifled muskets, mortars, and armored vehicles combined into a steel tide, were ultimately shattered by the Great Blue's armored cavalry.Muscle, magic, firearms, cannons... the new and the old powers continuously collided.In an era of great strife, Li Fei, with the help of a Ten Thousand Blood Bead, gradually became an existence akin to a BOSS:'Is this the extent of your damage? You haven't even taken off one-thousandth of my health.''You don't think this is enough to kill me, do you?''Don't rush, the second phase is up next!'......

Yang Qing never expected that he would travel to the fairy world, let alone that he would have a chance to travel back.

It’s just that after I came back, I found out that this world is not friendly to cultivation, and it’s a completely degenerated world, so what else can I do?

Part-time work is not allowed, so he can only rely on the rune technology of the fairy world and develop a little black technology to live his life, so his eyes are directly fixed on the moon above his head, where his dream begins!

- 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.