I Went from Detective to Great Magician on My Own

The tentacles of the Old Gods spread across the entire continent, strangling every possible power that might arise, until Foril traveled here. He relied on Shuxia and his own excellent strength to go from detective to the strongest magician in the mainland bit by bit. Steam and steel, old gods and potions, faith, magical dragons... This continent is filled with too many old gods... But even so, the times are constantly advancing, and the old gods could not have imagined that a man and a group of gray rats would meet them head-on! "Look directly at me, bastard!" "Squeak, squeak, squeak!"