An invasion of the past
After the last attack on the vampire settlement and getting no further information on Quinn, Muka, Xander, and Layla had decided to put some defensive measures in place. Although the previous attack had happened from within somehow, there was no harm in increasing their defenses.
The wandering guards that patrolled the settlement had their numbers increased, and each of them was given a communication crystal. It would amplify their voices, and the message would then be relayed to certain towers that had been built in the settlement.
These towers served two purposes. One was as a repeater; if a message was received from the transmitting crystal, it would play it out loud for everyone to hear and spread it until it reached another tower.
At the same time, vampires were stationed on the towers, keeping watch over the settlement and its surroundings.