MTL - Divine Doctor: Daughter of the First Wife - Chapter 5 Killing ring

Riding out the apocalypse on a tropical island isn't exactly a vacation. When mana arrives on Earth, Coop finds himself isolated in paradise with only one real option to survive. He needs to claim a civilization shard and level up. Coop maximizes his chances by carefully selecting a class and committing to progression. He’ll need to grind thousands of monsters to compete on the system's leaderboards while upgrading his settlement to represent the factionless.

Living as a concubine’s daughter in her previous life, He Danggui got herself and her daughter tortured and killed by her family and Princess Zhou, while her husband, Lord Ning, allowed them to do so for a secret.

After reborn as a child, she swore to hold back her kindness to the villains. How did she survive in a family with various secrets and conspiracies? Who would be her final choice? The love of her previous life or a new lover who could offer her a happy and simple life?

Sharing the identities of doctor, political counsellor and princess, was she able to bring great changes both in Jianghu and the imperial family? With her intelligence and excellent medical skills, would she let them pay for what they did to her or live differently as a new one?

- Description from Novelupdates

Following a brutal and tortured death, a former assassin, known only by his codename Kuro, is given the opportunity to reincarnate in another world, a world with magic and monsters. Armed with an unrivaled healing factor and an inhumane pain threshold, Kuro opts to go for a reckless direct approach in this world instead of a stealthy and cautious one, and as a result, slowly gains attention bit by bit.

Having previously been a loner in his old life, he interacts and befriends people for the first time in his existence, however, his blunt nature also sees him making just as many enemies, both big and small. By combining his old assassin skills with the magic powers of this world, along with his high resistance to pain and rapid regeneration, he doesn't take long to establish himself as a formidable force in this world.

Initially, Kuro only faces minor threats, like weaker monsters and bandits. But before too long, the threats slowly but surely become more and more severe…from Zombies to a bloodthirsty empire to Vampires and Demons, and even divine beings…however, as the enemies he faces grow stronger, so does Kuro, gaining rare powers that have never or rarely ever been seen in this world…

[Congratulations, Host! You have transmigrated to a magical world.]Good![Congratulations, Host! You have received a transmigration gift: SSS-tier identity—Prince of Ilan!]Very Good![Congratulations, Host! You have received a transmigration gift: SSS-tier Gift—Marty Bloodline!][Level-up Speed ×10, All Spell Power ×10]Very Very Good![Generating Bloodline…][0%... 5%... 35%... 42%...]Can’t wait any longer~~~[Warning! Warning! Warning!][World backlash detected! System is about to collapse!][Host, please evade! Host, please evade!]Wait, are you kidding me???[Bang!]And just like that, you transmigrated into a magical world.With the system gone, despite your extraordinary talent, you chose to lay low and survive.The world is vast, but staying alive is the top priority.Years later, a rumor began to spread around you:“Wait… you're telling me that useless prince… has been god rank all along???”