I Don't Have Enough Lifespan, so I Can Only Plunder Others

Travel to a world where everyone practices martial arts. Awakening a system that can plunder other people's lifespan, and use lifespan to upgrade skills. It takes one year of life to upgrade the skill to a small level. Spend five years of your life improving your skills to perfection Spend ten years of your life improving your skills to perfection From now on, I am either looking for techniques to increase my lifespan, or I am robbing others of their lifespan. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.