One Piece: The Virus King

He transmigrated into the world of Pirate King, but obtained a Virus King System.

What? Modifying his body with mutated viruses is child's play? Having a superhuman body is no big deal?

What? Powerful viruses can easily break down Devil Fruits? Microbes and bacteria can effortlessly replicate their abilities with the Copy-Copy Fruit?

What? He can even create his own viral DNA lineage database? He can create the DNA of Majin Buu and the ancestors of Otsutsuki Kaguya?

What? The reason Devil Fruits grant powers when eaten is that they contain something that can alter DNA? Does Oda know about this setting?

But the way these viruses are cultivated is also a little...

This novel and its characters are entirely fictional. Any resemblance to real people or events is purely coincidental. Do not imitate.