Wudi was walking by a pond enjoying the fresh air and marveling at the protective formation. He could feel a decent amount of Qi in the air. The Divine Demon Mountain already had a robust amount of dense Qi, especially the further you go in and the formation surrounding the fortress seemed to gather and amplify it largely. It wasn't as dense as the Qi around the imperial palace, but it had a different feel to it.
Wudi smiled, enjoying the fresh air and thought, "Formation dao is an auxiliary path, but looking at the formation, I can't help but feel slightly enmeshed. I'll ask Uncle Shou to get me some materials to practice formations."