When Ye Mo changed the first formation flag, Ye Mo had the big idea of the framework of the formation. Changing up the rest of the formation flags would be easy for him. After a day, Ye Mo had changed all of the outer formation flags of the illusion formation. Ye Mo knew there were a few main formation flags he didn't change but he had made.
During this time, Ye Mo didn't let Shadowless go out to hunt for food. He didn't even care about the voice calling out for his soul. Ye Mo set out a few spirit sense strikes every once in a while and the voice couldn't affect him. He just focused on setting up the formation. To him, the most important thing was preparing his escape path.
Ye Mo understood this place completely now, it was shaped like an oval, with the center of the formation at the center of the oval. Thus Ye Mo predicted that if someone was controlling the formation, he would be at the center of the oval. That would be the center of the formation.
