6 decades books

Kazz is the worst sorcerer in the world, he''''s weak, lazy, and a grifter who thinks his life has no purpose, however after witnessing an incredible show of strength from a young woman he decides to put his ultimate grift into action just to get out of poverty, and that is defeating the demon king... Or at least that''''s his excuse to get use of the girl''''s strenght for his own benefit!