This Villain Is Too Oppressive

Lin Yuan: Let me tell you a story first. Once upon a time there was a man who got one billion, but was chased by a snail all his life, and the snail could not be killed. The story is over, I am the one who got the billion, and the protagonist of this world is the snail. (He traveled through time and became a peerless evildoer with extreme talents, but he was hunted by the protagonist for the rest of his life, and the protagonist could not be killed...)