My Devil King Disciple Became Useless

My tenth year after transferred into this book. The male lead, who was cool, dominant, and powerful in the book, had practiced for five years and reached a level that was equivalent to 500 years of practice for others...

Under my influence, he became a useless person...

Original Title: 我把徒弟养废了
Author: 叫我烟烟烟
Leads: 沉舟 林碧落