Lifespan-Fueled Simulations: Gaining Longevity by Stealing Years

[Power fantasy + Martial arts + Invincible + Ruthless + Deduction + Simulation (no womanizing, no harem). The blurb doesn't do it justice, read the story!] Lin Xuan transmigrates to a high-martial fantasy world and becomes a sickly weakling who can't cultivate! Fortunately, he activates the Life-for-Power System! He can steal the lifespan of other living beings and use it to deduce martial arts, making his strength improve by leaps and bounds every day. Who says you can't cultivate without talent? I may have no talent, but I've got a cheat! By the time Lin Xuan realized it, he had already become an supreme, forbidden existence with endless lifespan! Behind him lay countless piles of bones...