MTL - The Legendary Mechanic in Marvel Universe - Chapter 50 found it

If you transmigrate into a cultivation novel, you absolutely have to fight over opportunities with the protagonist! I can’t be Long Aotian, but I can be the female version of him!

Unfortunately, as beautiful of a thought that was, our protagonist was still killed off as a boss by the male lead! Luckily, she reincarnated again and returned to when the male lead was a child! Seeing the little thing, bone thin with a vague hint of domineering flashing on his face, she had two choices:

1. Kill him. See how he’s going to be so overpowered when he’s dead!

2. Take care of him and honorably ask for something in return in the future!

Thinking of the treasures only the male lead could get to, the money crazy her chose to take care of him.

But who would have known that she would accidentally raise this cute and upright little boy into a black-bellied wolf! After he grew up, he used his treasures to seduce her!

“Master, do you want it? Then why don’t you dual cultivate with your disciple?”

Master with tears streaming down her face: If I had known I could get treasures with s*x appeal, why would I have been a boss in my last life!

- Description from Novelupdates

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.

A world from another dimension suddenly appeared in the Milky Way galaxy and collided with the earth. A spatial collapse occurred, which allowed the monsters crossing over from the other side to invade various countries, and the earth fell into great calamity.

The military was powerless against the invasion because modern weapons didn't work against monsters from another world. Under the desperate situation, a god-like figure appeared and bestowed blessings upon the humans to awaken their power. From then on, the earth regained its hope, and these extraordinary people were called Realizers.

Tenku Okuihara is a five-year-old boy who dreams of becoming a Realizer to protect the world and his family. But an incident changed his life goal from a hero to a grim reaper.

I found myself possessing the body of a young master who everyone was eager to kill. I’m invincible, so let them try to kill me. It’s only for one second, though.