Curse Technique can be divided into many types.
Back then, Hu Zhili was wholeheartedly pursuing quick, precise, and cruel effects, learning only the most effective and vicious magic from his younger sister, and without exception, this kind of curse required using one's own lifespan to cast it.
Simply put, if he wanted to curse someone, he would have to first take out his own lifespan to perform the curse, waiting until the other person was cursed to death before possibly replenishing the lost lifespan.
Not knowing how much lifespan the opponent actually had left was the biggest obstacle for Hu Zhili when casting a curse.
After all, the lifespan spent was tangible and if the opponent's lifespan was little or they died before the curse took effect, it would be a losing deal for him.
And this loss meant losing his own life!
