After Wall Guardian Elder saw the Sect Leader nodding toward her.
Wall Guardian Elder immediately began, forming a Spell with his hands.
The reason Wall Guardian Elder formed a Spell with his hands was that he understood the Sect Leader's intention.
The Sect Leader's intention was to let him open the gate leading outside the walls, where they would reclaim the resources they gained before.
Reclaiming, in essence, meant that they would transport those resources back slowly while Thunder Eye wasn't paying attention, since they were obtained through great sacrifice and loss.
If solely relying on Wall Guardian Elder to slowly move the walls, it would take hundreds of years to reclaim the resources they obtained before. Moreover, during this time, no one could guarantee that Thunder Eye would not attack the Array.
