Become Invincible in the World from the Method of Qualitative Transformation

In troubled times, evil spirits are everywhere. Lin An traveled through time and found himself in a village full of evil spirits. He wanted to use his body to reincarnate into a monster. Just when he thought he was in danger, Lin An awakened to the golden finger. Killing the alien species and obtaining the alien species can make the skill qualitatively change, and it can also directly complete the skill. [Huasheng Boxing (beginner level): not good] → [Huasheng Da Zizi Fist (celestial level): perfect] [The Secret of Metamorphosis (Beginner Level): Not in the Current] → [The Secret of Destroying Demons with One Qi of Heaven and Earth (Heavenly and Human Level): Perfect] [Breeze Footwork (Beginner Level): Unrivaled] → [Xuanqing Demon Shadow Body Technique (Heavenly Level): Perfect] A few years later, someone scolded Lin An angrily: "Everyone has developed yin-type Qi, how come you have become the most yang-type Qi?" Lin An looked at the mountain of corpses and sea of blood behind him, and shook his head: "Maybe you all practiced it wrong." He flicked the long knife in his hand and glanced at the sky. In the sky, the figures of various immortals and Buddhas flickered. Lin An threw out the long knife and stepped on it. "Actually, I'm curious whether those who have become immortals or Buddhas are considered aliens." "How about you sacrifice yourself and let me kill one of you?"