1. Soul of Negary World Hopping with dark story. MC will try to squeeze the world he's in just for him to be stronger and reach godhood. He's like the last boss... 2. I Really Am Not The Lord of Demon Ridiculously very very strong mc
Soul of Negary, Reverend Insanity, Warlock of the Magus World, I'm Really Not The Demon God's Lackey.
https://www.royalroad.com/fiction/28687/the-last-science-se The world turned upside down by something, kinda.