"Substitute technique." Lin Hu paused for a moment as he knew that it was a high martial art that was a bit magical. "There's a technique to switch you with your servant's life under a special soul contract. This would allow the attack that can kill you to be diverted to the servant, which will kill them instantly."
"How is that possible?" Lin Xiao was stunned. How could one trade one's life with another person?
"It's not impossible, but this technique is not invincible. For example, it can't be used during sparring nor during a life and death's battle where the two have signed the agreement. There are many others but I won't explain it to you.
