Xuanhuan: This Proficiency Is Far Too Overpowered

After transmigrating into a fantasy novel as the great villain, he binds a Proficiency Panel. He only wanted to lie flat and be a good person, but the protagonist forced him to cripple his own cultivation and subjected him to every kind of humiliation! Then he decides: swing his blade a hundred million times, reach perfection, and wield a single strike that makes him supreme across the Nine Heavens and Ten Lands, invincible! In this world, immortal sects and martial dynasties pursue fame and fortune, and everyone seeks immortality! Yet the strong prey on the weak and treat human life with contempt! I, Gu Changsheng, will sever the path to immortality and bring an end to the ages! I will give the world a pure land once more!