I Transmigrated into a Book and Became the Real Rich Daughter's Pampered Cousin - Chapter 392 - : The Truth

The most feared Assassin in the world died because of vengeance.

What would you do if you were told you only had five years to live?Aster Mistral, suffering from an incurable congenital “disease” that saps life force out of his every breath, decided to fight with all his might. Waking up into the future, 2,500 years later, he embarks on a quest to find a cure for his ailment!“My target! To find the Panacea on the 1,000th floor of the dungeon!”Together with trustworthy allies, he forges a path of blood and corpses, building his foundation and increasing his level! However, he can’t stay in dungeons all the time, as he has a duty to fulfill.“To raise the human DNA average of the world, the government wants my seeds?!”Follow Aster on his laidback journey of fighting monsters, courting girls, escaping adversaries, and discovering secrets about himself!

In a world where human and monsters relied on mystical fruits and their inner power to fight for dominance, a lost soul was thrown, given the powers from all the other worlds he’s known. But there was a catch; he had no control over what power he would get! With knowledge beyond that of most, he sails his path to the top of the one piece world!

- Description from Novelupdates

One-eyed Wolf Lecan is a skilled adventurer who has conquered many dungeons all over the world. He had been going solo for a long time, but in the last three years, he’s had a partner. That partner jumps into the black hole together with Lecan, and both go their separate ways as they fall into another world. Dungeons and magical beasts also exist in that world. After learning the native language, Lecan goes on a journey. Meeting a good teacher, Lecan studies medicine making and magic under that teacher, and begins his dungeon explorations for real.