Witcher: I Can Extract Everything - Chapter 17

Meet Baek Ri-hyun, the renowned legendary martial artist of murim and was given the title Martial God.In a battle against the Heavenly Demon who has transcended mortality, Baek Ri-hyun was suddenly pulled by an unknown forces to bring him to another world by the power of a goddess who is in need of help from different people, not knowing she pulled a god into her world.Blessed with a system to aid the growth of the future heroes, I don't think he'll need something like it as he ventures the new world.

An ordinary youth living in the year 2050 in the Western calendar accidentally came to a fantasy world created by the collision of magical elements and supernatural technology at the other end of the dimension…

- Description from novelbuddy

WSA 2025 Entry—Updates on Weekdays#wsa #wsa2025Demon Kings.The Strongest Demons who stand at the peak of the Demon race’s hierarchy.Each one of them wields such overwhelming power that they sit at the top of the Universe’s food chain; among its strongest beings.When the reborn Xaren laid eyes upon the visage of one of these Demon Kings, all he could feel was endless admiration towards the immense power displayed.At that moment, he gained a goal to strive for in this second life of his.He was originally just living to survive, but now, he was living for something else.The path ahead was going to be rocky, riddled with trials, and standing in his way forward would be the many horrors that lurked in the corners of the Universe.But he’s not gonna let that stop him.After all, he’s Gonna Be a Demon King![Check out my other stories from my profile: Godslayer’s Legend, Reincarnated Hero System & Beyond the Bloodline]

Our protagonist Caam is a man from Earth that was reincarnated into this world as a demon. In order to survive, he spared no effort in avoiding the sparks of battle and without noticing it, he became strong himself.