The Boundless Heaven Sword Art was invented by Palace Master Xuan Yi.
Jian Wushuang did not know which level this Secret Skill belonged to. He only knew that it was powerful.
The Boundless Heaven Sword Art was comprised of seven movements and each move was stronger than the previous one.
The first move was already terrifying, but the second move was several times more terrifying than it.
The third move was naturally more terrifying than the second move.
Jian Wushuang had lived in the Eternal Zone for 100 years. His Sword Principle had made a breakthrough, so did his Boundless Heaven Sword Art.
He had already mastered the third move.
The third move consumed an enormous amount of Spiritual Power. Once Jian Wushuang displayed it, it would cost him 40% of his Spiritual Power. Unless necessary, he would not display it. But now, he could only turn to this move to defeat the three monsters.