My Teacher Is Invincible. My Disciple, Come and Protect Me Quickly.

Yang Xiu, who has a plain temperament, travels to a world full of aura. And gained unknown powerful power, but could not control it. Forced to have no choice but to live like a mortal, he went around to learn from his teachers, hoping to control his own power. ... Many years later, Yang Xiu stepped on a foreign land, looked up at the vast starry sky, and sighed with emotion while holding the hot 'Cold Expelling Pill'. "I am truly invincible now"