Deceive the Younger Junior Sister at the Beginning, and Reward the Abnormal Pupil

Who says villains have to go head-to-head with Destiny's Son? I start by awakening my perverted pupil, which can see through people's hearts! I'll intercept the protagonist's opportunity! I'll steal the protagonist's skills! The protagonist's future wife, I'm sorry, is now my personal swordsman whom I taught you step by step! Many years later, the protagonist's alliance gathered to attack me, only to find that his former confidante and right-hand man had all become members of my "Devil Training Class", shouting in unison: "Whoever touches my master, die!" This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.