Mr. Zhan's Little Demon is All Grown up - Chapter 30: Threat

This is the story of a crazy lich who possesses an internal game system and brings catastrophe to the entire world.

In 1984, the appearance of Sean added another fire to the already chaotic public order in the United States and poured another barrel of oil…

What? You say he’s a source of chaos and a total badass?

you are gone!

Rebirth, Beauty Comprehensive, Coquettish Lawyer, Breaking Bad, Shanzhai, Hollywood, Iron Crotch, Security Group, a comprehensive business empire.

- Description from novelbuddy

Anyone who could construct a stable Spell Model could become a Wizard — that was the Wizards’ ultimate secret! Having been given a new life as the son of an aristocrat and armed with a super quantum computer from his past life, Spell Models came as easily as breathing to Merlin. With this overwhelmingly huge advantage, would Merlin become the greatest Grand Wizard of all time?

- Description from Novelupdates

A biker tries to save a cat on the highway and gets hit by a truck (Truck-Kun), he was rushed to the hospital but, due to internal bleeding, he dies only to be reborn as a cat, in a new world with a system.

In this new and vast world, he tries his best to get used to his new body and get stronger along the way. With his overpowered system and skills. To one day become untouchable.