Reign and the others first waited in the tower for a bit. Without any knowledge of how the inside of the base looked like, it would be dumb of them to simply get out and explore.
Aethion only needed about 5 minutes to get the information. He was only asking for a map, and the immense pain the man's soul was going through made him break fairly quickly, leading to him telling Aethion what he wanted to know.
"Continue with the interrogation, get everything we need from that guy before moving to the other two, I want to know just what the hell is going on in this place." Reign said as he and the other two started moving.
With the mental map that Reign had of the entire building, it wasn't hard for them to get to the basement, but it would take some time. There were elevators present in the building which would speed up their journey a lot, but unfortunately, the elevators could only be used by those who were members of the gang.