Martial Arts System in a Fantasy World

One step to reach the sky, one sword to cut down the sun and the moon! He was an orphan in his previous life and was beaten to death. Unexpectedly, unexpectedly, the book in his arms got into his jade pendant, turned into a system, and parasitized in his mind. In this life, I will definitely use the sword in my hand to kill everyone in the world who stands in my way.