In this battle, Yitiao was severely wounded. After the city's defense forces joined the fight, Yitiao was driven into the skies, helplessly watching as they took Bai Suqing to the Seven Treasures Pagoda within the city.
The water cellar at the base of the Seven Treasures Pagoda was actually an Imprisonment Spell Array inscribed with ancient Yun Qin era symbols. The unique secret Formation of the Yun Qin mages had also been lost on the Silk Continent due to wars and the changing of times, so the only existing functioning Imprisonment Spell Array was in the Seven Treasures Pagoda.
The Seven Treasures Pagoda was cast entirely of bronze. After the First Emperor of Yun Qin collected weapons from all over and smelted twelve Golden Figures, there was too much bronze left over, so he had no choice but to cast seven bronze pagodas and place them throughout the Nine States. The water cellars at their bases were inscribed with Imprisonment Spell Arrays, intended to suppress evil.