Moments ago.
The banshee queen was busy messing with the remnant of the humans that attacked her.
They refused to tell how they breached the array. Hence, she needed to scare them.
Despite killing one of the last two men, the other didn't spill out the method. He trembled in her presence, yet, when it came to what might save his life, he was firm.
However, he would never expect that the queen didn't need a method to break out of the array.
Once she consumed her precious egg, she would begin her first mutation as a banshee queen. This would give her enough power to break the array.
The humans' legend Caelein used [Holy Crystals] as a power source for the arrays. Over the decades, it would gradually lose power. So, the queen understood she was capable of damaging it, once she got her first mutation.
As a queen and a naturally inquisitive creature, the queen possessed a large amount of knowledge in her head.