MTL - The Ancestor of Body Repair - Chapter 1414 Research (below)

Huang Dan’s pain nerve is innately different from the ordinary people. A little tore in his skin can cause him to sweat all over his body painfully to the point of him unable to make a word out.

Somehow, he began to cross world, following Mr. System to do the tasks…

In the first world, Huang Dan realizes what it means to die painfully and to live to die again.

TL’s summary:
MC suddenly transmigrated and is bind to a system, requiring him to solve mysteries. Born with a higher degree of pain sensitivity, he met different people in the different worlds and learns what kind of emotion smiling is.

- Description from Novelupdates

Genius, antisocial, solitary, intractable , maniacal.

At the turn of every era, it is he who raises the flag of the rebel cross.

Winners take it all, losers take the fall.

He who brings order to a chaotic world, assembles talents and masterminds.

He who hides among the crowd, yet stands on the top of the world.

— The one and only, him.

- Description from Novelupdates

Born into a dirt poor mining family, Karl only had one chance to get ahead in life, the annual elite recruitment day. On their final day of middle school, every student in the Golden Dragon Nation was given an experimental injection to awaken their affinity with magic.

Those few who succeeded would become the Elite, the leaders and idols of the nation, blessed with incredible magical powers and respected by all. Those who did not would return to their normal lives of hard work and low wages, just doing the best they could.

But with the nation surrounded by enemies, both humans and monsters, how long would these peaceful days of magical idols last?

Follow the story of Karl as he awakens a unique power and strives to become the world's first Legendary Beast Master.

I wasn’t supposed to awaken. I didn’t have a System. I didn’t have power. I was just another nobody trying not to die.Then I fell, into something ancient.Now I’ve been chosen by a Trial that wasn’t meant for me.If I survive, I won’t just awaken.I’ll become something the world was never ready for.One of the Primordials.