Practicing magical skills by mistake will cause chaos in the world

"Have you heard? There is a new demon in the world?"
"But that old stone demon who claims to have astonishing wisdom?"
"Yes, that's the devil! That devil has great martial arts skills. He often uses a wrong secret book to make the entire sect go crazy! And he takes pleasure in it!"
"That's what I heard too! The devil is really crazy!"
Half a magical secret book opens Shi Feizhe's path to martial arts!
When he became invincible and everyone shouted for beating, he faced the rumors and angrily said:
"What? Did I practice wrongly?"
"No way! Absolutely not!"
"With the same technique, I'm obviously stronger!"
"If you can't practice, that's because you're not talented enough. It's your problem! It's you who are wrong!"
"No one knows how to practice martial arts better than me!"