Dragon Tamer - Chapter 249 - 250 Who Are You?

With the Legendary Mechanic System, I transmigrated to Marvel Universe to be Dr. Zola’s assistant.

With Mechanical Force Analysis, I can learn every black technology.

Winter Soldier’s arm? I built a better one for you.

Iron Man’s armor? I already made it a decade earlier.

Doc Ock’s tentacles? I am the one who provided core technology.

Hulk’s mutation? Sorry, I was there and got hit by the radiation too.

As for a certain purple potato, can he collect all Infinity Stones?

……

However, I only had one simple ultimate dream. That is to go home…

- Description from Novelupdates

The world was cruel.....Especially for those who had lost their chances to shine.Aether was one of them....Aether, an individual born with a silver spoon, found himself discarded like a defective product. He had longed for love and tenderness, but what others showed him was nothing but pain.Even in the face of that pain, he smiled not because he wanted to, but because he had no other choice. Despite the heartbreak, he entered into a hell called society with a beautiful smile.....“Can't you do a single thing!!”“...”“You are fired!!!”“....W-Wh..”“I am sorry, Sir, but you need at least a bachelor's degree to enter our company!!”“....I-I am...”“I am sorry, Sir, but we cannot provide a loan for your ideas without reassurance!!”“....W-Why?”“I heard your father is a politician.... So, You know....”“...”After a long struggle, he finally got a job, but his brother's words rang in his ears:“Yeah, yeah… I know you got the job thanks to me, of course. So, don't ever contact me or even MY parents” his brother declared.“...Heh...”Just as he believed he had earned society's recognition, an unforeseen event claimed his pathetic, seemingly worthless life....“HONK!! HONK!!”Yet, amidst the cruelty of society, he defiantly cried,“I JUST WANT TO LIVE!!!!!”Witnessing his heartfelt cry and desire to live in the hellish place called society, he was granted a second chance.~Ding!~However, even in this new life, his situation remained unchanged. He continued to struggle not only to live and eat but also..... seduction.“HOW DARE YOU SEDUCE THE PRINCESS!!”“.....he..he... B-But I didn't seduce her!!”“HOW DARE YOU SEDUCE MY MOTHER!!”“...Hehe”“YOU HAVE SOME NERVE TO SEDUCE MY WIFE, DON'T YOU?”“HEHEHEHEHEE.....”

In this world, orphans or just anyone without any hope for this world can apply to become a “walking target”. Their sole purpose is to be a practicing dummy for the students of the sect who train to become “Demon Hunters”. These students need “walking targets” to test their training on living, walking beings of flesh and blood.
In exchange, they will be provided with food & shelter.
Their existence value is lower than a slave, but if they manage to survive a few years they can receive a life long pension.

Xiao Han is such a “walking target”. One time he witnessed a powerful Demon Hunter disposing a demon. When the demon died, a fragment of the demon that managed to escape entered Xiao Han’s heart. No one saw that, and even Xiao Han himself only felt some discomfort for an instant.

But that thing in his heart soon gave Xiao Han visions, and the first one is of a cultivation method which allows Xiao Han to absorb damage to enhance his body. A perfect cultivation method for a “walking target”.

- Description from Novelupdates

The constant mission is getting redemption.

Shuttle though various worlds to become a variety of scum men, do a little whitewashing and become a good man in the eyes of everyone.

Redeem those who are miserable, and let them live a happy life.

- Description from Novelupdates