The seal already cracked under their attack before, but it could self repair. However, that took a long time.
Ye Mo could tell that in a few days, this seal would reveal a periodic entrance. Cultivators from outside would be able to enter from the light pillar. This opening wouldn't be open for long, but cultivators could go in and out quickly.
Xie Zhengshi must've realized this. To be able to do this, it meant he was a formation grand master.
However, he didn't say this and instead tried to ambush him. The only reason was to take all the immortal crystals for himself.
Although everyone loved immortal crystals, Ye Mo felt contempt towards Xie Zhengshi's plans.
Cha Qizhao quickly said, "Brother Ye you must not attack that seal anymore - if you do, it would explode again."
Ye Mo didn't plan to do so. He instead turned around and looked at Xie Zhengshi asking, "City lord Xie, you're a formation grand master?"
