Ye Fei wasn't unfamiliar with formations. He even had a magical artifact capable of arranging and altering time through formations. However, the formations he had seen before were always set up with objects or natural landscapes, like the massive natural formation in the southwestern primeval forest.
This kind of formation, composed and arranged by people like his mother-in-law and senior sisters, was something he had never seen before. It was so fascinating that he was completely captivated.
While formations might not be particularly useful to him personally, the idea of teaching them to his women was appealing. It would enhance their combat strength.
Although with him around, the chances of his beloved women engaging in life-and-death battles were virtually nonexistent, the saying "the more skills you have, the better" still held, right?