Fex's bad plan
As the three boys followed Fex they couldn't help but wonder what kind of plan he had. He said he had prepared everything beforehand. Quinn was thinking of all the possibilities, given how young Fex was and how the system hadn't recognised him it was clear that the two Vampire minds were a generation apart.
Meaning perhaps there were some things that had changed that even the system didn't know about. Maybe in the time period, they were able to find a substitute for the human flesh? Whatever the plan might have been it had to be better than letting Peter roam around and kill people.
As they followed Fex they realized that he was leading them back to the student dorms. Until finally, they had reached a room not too far away from theirs, located at the end of the hall. It was the last room.
"I hope you're hungry," Fex said as he opened the door.