"Well, it's just what the system does," they say, raising their paws into a shrug. "Usually it's just Bezaliel's goonies or cursed ones slipping in through the tunnels. Here."

They run over to the three other boxes 'typing' in some kind of code into the sigils on the side of the front pyramid. Each one does the same thing - the base of that pyramid glows, and then shifts upwards like a lid. The last pyramid box has nothing in it.

"Oh, there's nothing in this one..."