HP: Principle of Magic

"As a senior Auror, who do you least want to fight?" Several years later, the Daily Prophet interviewed Harry Potter, one of the top ten young wizards. "Professor Valentine! I would rather face Voldemort than face him!" Harry said in horror. "?" "Whose good person's color-changing spell releases a gamma ray burst? Whose good person's armor spell can freeze people to death? Whose good person's fire spell can turn a young man into an old one like he was just unearthed?" ……… Agares Valentine, a genius boy who graduated from Hogwarts, went to college in the Muggle world, but used natural science to explain magic and took a different path to become stronger. This book is also known as "Professor, why is your magic so weird?" "Isn't this magic? How come you have become a concept god?" It is a very serious (possibly) professorial text with no system and no time travel.