If You Are Not Invincible, How Can You Be a Demon King?

Lu Zheng traveled through time and became a martial arts apprentice, but at the beginning he was hired to dump his corpse in a mass grave. Fortunately, by awakening his system and consuming the karma spring, he can improve his skill level. From "Yuanyang Vajra Kung Fu" to "The Golden Body of the Immovable King of Ming Dynasty, which will be destroyed for all kalpas", From "Glazed Vajra Finger" to "Daluo Prison Seal", From "Dark Shadows and Mysterious Charms" to "Jiuyou Wuxiang Zhenwo Sutra" … Step by step, he finally becomes invincible!