Youngest Son of the Renowned Magic Clan is a Manga/Manhwa/Manhua in english language, Action series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

A flimsy plotline and a garbage setting. A string of words too embarrassing to even call a novel. Yet I ended up inside the pages of that very same novel I wrote. And as Rasen Mayten no less, a bastard of a side character who gets murdered at the age of 17. As the writer and creator of this world, I will now recreate the world of the character 'Rasen Mayten'.