Ash
Keiza's heart skipped a beat, her pupils constricting. However, after a moment, she slowly managed to calm down. She realized what was happening and made the same deductions as everyone else a step quicker.
She didn't know a lot about this formation. Although she had been monitoring Leonel all this time using Libra family twins, the level of clarity their methods could bring was limited. While they could cover very large regions and their methods were difficult to detect, there was a tradeoff that came with that as well.
Even so, she knew enough to know that this formation was the formation that Leonel had used to clear the Gold Grade trial, and also further knew that he needed soul constructs to make use of it. Even though many had died in this battle, they were ultimately just a drop in the bucket, they weren't nearly enough to turn the tide.