The Nine Cauldrons - Chapter 601 - Life or Death

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?”

One day, Luo Jian woke up from his sleep and found himself in a locked chamber where the door and window were all sealed. A note with a few lines written on it was tacked to the wall: “Escape from this room within an hour, otherwise, you will die.”

There is a sequel called Reincarnation Night (轮回之夜) that takes place in the same universe but has different main characters

- Description from Novelupdates

It’s the age of superhumans!Genetic modifications, Cybernetic enhancements, magic enchantments- the choice is yours! For the right price, you can rise above the masses and gain power only ever seen in myths!For the right price!No matter how far humanity advances, power will always fall in the hands of the wealthy few. It was a truth Dante learned at a very young age and with it came a burning hatred for those who look down on everyone from their ivory towers.The flames grew stronger once he found himself faced with the cruelty of those who rule from above. He swore revenge on each and every one of them, but true power couldn’t be fought with hatred alone.In his search for a weapon that could help him take his revenge, Dante crosses paths with a certain Artifact, his fate taking a turn he could never have anticipated.