Genius Warlock of the 19Th Century

In 19th century Europe, a genius warlock from the bottom of society encountered a black magician by chance. In the process of learning black magic, he gradually became fascinated. "Can I extract souls as raw materials for magic?" "No, extracting your soul will hurt yourself." "I didn't say extracting one's own soul, wouldn't extracting other people's souls do no harm to oneself?" "Oh my gosh, you are such a natural born black magician." This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.