Upon hearing this, Leo Ray exchanged a glance with Jasper Richardson, and then shook his head helplessly: "It's unfortunate, Her Majesty the Queen, but there are no traces of any Barrier Area here, and when the Grand Army disappeared, there were no signs of spatial fluctuations, without doubt."
Just as Leo Ray said, when Saul and the others mysteriously disappeared, Leo Ray had already instructed Jasper Richardson, who had returned to Tier 5 peak, to detect any possible space fluctuations.
However, until the changes on the City Wall came closer, Jasper Richardson had not detected any traces of space fluctuations.
Moreover, even the most skilled space series master couldn't possibly open such a vast Void Space entrance and instantly teleport hundreds of thousands of the Grand Army.
Even taking a step back, even if someone could open such a massive Void Space entrance, it's absolutely impossible not to leave any traces.