Transmigrating into a Book as the Villain: Devouring the Protagonist's Fortune from the Start

Lu Xing wakes up to find that he's become the cannon-fodder villain in a fantasy power-fantasy novel, someone who doesn't survive three chapters! Right in front of him is the famous scene from the original story: the protagonist holds a divine sword, ready to offer him as a sacrifice to Heaven! A certain death trap? [Ding! The God-Tier Devouring System has awakened!] [Devour anything, exchange it for anything!] “Ding! Successfully devoured part of Heaven's Chosen Lin Feng's fortune. Exchange points +10,000!” “Ding! Exchange successful! Congratulations, Host, you've obtained the god-tier cultivation art, Heaven-Devouring Demon Art!” From then on, Lu Xing becomes the ultimate nightmare of every Heaven's Chosen protagonist. The Sword God reborn from the dead? I'll take your divine sword and legacy! A genius alchemist with an old master in his ring? That strange flame of yours looks delicious! A Desolate Ancient Sacred Body born with Supreme Bones? Sorry, those bones are mine now! One Heaven's Chosen after another appears, brimming with confidence and carrying their golden fingers, only to discover in despair that the greatest “opportunity” in this world is none other than themselves! Lu Xing: “Heaven's Chosen protagonists? No, you're just my personal experience-point packs!”