I Slay Demons in a Chaotic Age and Refine My Way to Sainthood!

Qin Ming transmigrated to the Great Yan Dynasty, where he was framed by a frontier general. With no other choice, he left home and settled in Qingyun City, becoming a low-ranking Demon Slayer Guard. He bound himself to the Demon-Slaying Deduction System. “You killed a black-maned wolf demon and gained five years of demon lifespan!” “You killed the dark red Rat King and gained twenty years of demon lifespan!” “You killed a Shadow Leopard at the Origin Opening Realm and gained fifty years of demon lifespan!” “You spent ten years of demon lifespan to deduce Bone-Tempering Stance to perfection!” “You spent a hundred years of demon lifespan, transforming Stone-Splitting Fist into Mountain-Crushing Fist!” “You spent eight hundred years of demon lifespan, transforming the sixth-grade art, Tiger-Subduing True Mantra, into the fifth-grade Tiger-Subduing Heavenly Aura Mantra, at mastery!” When a mighty figure from the Great Xia Dynasty's Purple Mansion Realm stood high above the world and unleashed a world-ending tribulation of lightning, Qin Ming silently opened his panel. “System, give me all the points!” The next moment, dark golden astral energy tore through the sky, and a hundred-zhang Dharma Idol shattered with a thunderous crash! Everyone: “???????”