The Retired Hero is an Extra - Chapter 143 - : Boss Monster

“This is the system? This is my trump card? Why did you only give it to me after I died?” Lu Qing crossed over to the cultivation world and spent 200 years to become a Golden Core cultivator. He married, had children, and created a clan.

He only activated the “Clan Development System” after he died from serious injuries. [Spiritual Root Enhancement], [Resource Scouting], [Pure-yang Body]… Which option do you want?

I’ll give it all to you! I truly am your ancestor. Listen to me and I’ll take you to the skies!

Traveling to the world of Hokage, Kamiyo Colt witnessed the chaos of the Nine Tails firsthand.Without any special powers initially, he planned to develop quietly and survive until the Infinite Tsukuyomi. However, when he first trained his Chakra, his system finally activated.The system's rules were simple:By healing others, he could gain random attributes and skills.“Heal Uzumaki Naruto to receive pure Ashura Chakra!”“Heal Uchiha Shisui to gain his bloodline talent!”“Heal Sasuke Uchiha to obtain pure Indra Chakra!”In this way, Colt steadily developed his abilities over more than ten years.During the Fourth Ninja World War, when the ninja coalition saw him suddenly knock out the Six Paths Madara with a single punch, he looked innocently back at them.“What? I'm a medical ninja. Doesn't it make sense to defeat him with one punch?”

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

I am Ye Qing. Lucky I found a [Monster Factory] application.