I Have an Invincible Demon System Inside Me

Tang Fei accidentally transmigrates from Earth and happens upon the Invincible Demon System.

"You suffer in silence and play dumb, all just to scrape by?"

"Sorry, that's not happening."

"You're a genius with the Supreme Upgrade System?"

"Sorry, it's mine now."

"You're the God of the Planes, able to travel between planes and rule all worlds?"

"Sorry, from now on, you're under my command!"

"You refuse to accept that?"

"Then die!"

As the strongest Host in the history of Systems, Tang Fei sets out on a journey across countless worlds, crushing all opposition with his ridiculously overpowered stats. "When I swing this sword, you might die!" Tang Fei.