Jake reached the enemies in time to see them using the system to head to another world. It was a pity that he couldn't tell to where they teleported to… Nevertheless, they were retreating en masse, so the job was over before things got too messy. A good part of the city had been destroyed, and hundreds of lives had been taken, but at least the worst-case scenario was avoided. Unfortunately, he didn't learn much about the enemies... so he couldn't predict their next steps.
Jake decided to leave the city, and he found it weird that he barely saw anyone guarding the entrances… the soldiers of the place were still recovering, but if reinforcements hadn't come to help… then why did the attackers leave?
"Perhaps they assumed that I was just the first or that I warned others," Jake thought while he was returning to the area of the dungeon without being bothered by anyone.