one piece: gene extraction and fusion system - Chapter 1: A Beast, a System, and a New Beginning

More than ten years later, this sentence gradually spread in Elbaf Continent:

Never use magic to deal with tyrants, because you will find that he will return your spells to you thousands of times after being strengthened by countless magic specialties.

This is the story of a dragon-shaped self-propelled fort that keeps doing things in another world.

There is nothing that one magic can’t fix. If there is, then there are more. ——Izawa

- Description from novelbuddy

He—an enigmatic and cold-blooded soldier with a mysterious background.
She—a ruthless and bloodthirsty spy.

Others treated disease to save person, he treated disease to steal heart.

The Frost Goddess was deeply captivated by him. The gentle and kind beautiful teacher was completely enchanted by him. Even the cold and beautiful female assassin melted quietly because of him.

Competing in medical skills? He was the one who treated the Godly Doctor. Competing with backgrounds? Leaders rushed to him. What? You actually wanted to compete with him in a match for match? Looking at the gentle girl beside him, Tang Yu had a headache as he said, “Beautiful girl, how did you fall in love with me?”

- Description from Novelupdates

(A/N: If a ruthless MC is not your cup of tea, don't read this.)Heat Wave, Torrential Rain, Severe Cold, Tsunami, Flood, and Alien Beasts swept the world in a series of natural disasters, almost wiping out mankind.Lu Nanzhi regressed two years to the past and found out that the settings of the natural disasters was similar to the mobile game app she played before regression.And it was in the beta testing phase.Ding—[Beta Game Test is over.][Data is being reset.][Player is starting over.][Please claim the Beta Test Rewards.]Equip with the Beta Test Rewards, Lu Nanzhi was determine to survive in this life and started stockpiling like crazy!