Secret Skills of Star Palace, also known as Secret Skill of Seven Star, originated from Seven Star Black Sect.
Back in the Ancient Past, there had been numerous experts from the Seven Star Black Sect. Their understanding and usage of the Secret Skill of Seven Star had reached incredible levels.
These powerful experts form the Seven Star Black Sect had managed to infuse star power into their blood essence.
Emperor Thirteen was the leader of the seven stars and cultivated the Secret Skill of Seven Star.
However, the restriction by this heaven and earth was far too large for him.
He could not use most of his fighting power and most of his secret skills.
It was not only difficult to cast Secret Skill of Seven Star.
Emperor Thirteen would not be able to cast Nine Star Armour like how Emperor Bai did.