Legendary System

"Oh? Is Wu Zun very powerful? Wan Jian Jue" "Illusion? I can do it too" "Oh? The genius of the sect? I'll beat up your entire sect with one hand. You're nothing." "Oh? You said you are the Demon King and control thousands of great demons. Okay, do you want to dig out the beast core yourself, or should I dig it out for you?" … Watch the boy from Earth rewrite history with his heaven-defying system