[Fast-paced + action-oriented + exhilarating + chaotic killing + no talking + level progression per chapter + invincible + single female lead]

When immortals cease their presence, demons wreak havoc on the world.

Li Ci awakens the Lifespan Deduction System, slays demons, plunders lifespan, and deduces endless supreme immortal techniques.

[Iron Finger → King of Hell's Finger → God King's Finger → Supreme Immortal Technique: Immortal's Guidance!]

[Dragon-Slaying Sword → God-Slaying Sword → Great River Sword Qi → Supreme Immortal Technique: Nine Heavens Starry Sky Great Sword Art!]

[Giant Spirit Body → Nine Deaths Demon Emperor Body → Great Sun Holy Buddha Body → Supreme Immortal Technique: Ancient Holy Body!]

Lifespan calculations are unparalleled; with a flick of the finger, one is invincible, unmatched in the world