By sending the signal with their fake orders to the walls, Esen's mental energy would follow along giving her the chance to take over their defensive system.
Because of the distance between the couple's current location and the walls, it was not guaranteed but at the very least she could mess up with the system from there.
'It's there.'
Esen informed Mares as soon as she felt her mental energy entering the defensive system.
'Very well.'
Having done what they aimed to do on this base Mares finally stopped hiding his presence, leaving his power out.
His large coat covered his body and within the small room he was in, it occupied every grain of space on it.
Making his sword out of his multi-weapon, the silver-eyed brought it down with a slash of Ghastly Energy, destroying the room in one large attack that traveled across the whole building.