"How did you find the undead's base of operation?" Lith asked.
"I was lucky. I stumbled upon the vampires during my patrol, while they were assaulting a travelers' caravan. I was about to intervene when I noticed that the bandits were freaking undead.
"I let them do their job and then I followed them back to their hideout. They had taken the humans alive, so I thought that I could save them later. Worst case scenario, they would have been collateral damage. The Kingdom sometimes requires sacrifices." Acala shrugged.
"After alerting the Headquarters, I tailed them in an underground network of caves that led me damn deep. That plus the arrays shut down all communications.
"I got stuck there because, after performing the ritual to turn their prisoners into thralls, the guards resumed their positions while I was still studying the odd machinery they built. I had to wait for their next expedition to get my opportunity to escape.