As the Auction was going on, there were some people sneaking around in the Auction building right under everyone's nose. When it's said right under everyone's nose it literally means right under their nose, which is also right under their feet.
There were some people wearing black colored dresses or more precisely it was just a piece of black clothing that was wrapped around their bodies making them look like walking black mummies, instead of the normal mummies that are wrapped in white clothing.
Now the question – What were they doing? And how did they go unnoticed by so many high-ranking raiders?
To answer those questions, you will have to look closely at them. The dress they were wearing or the piece of clothing they had wrapped around them had some strange patterns drawn over them.
Those patterns were unreadable as they were very complex, but they glowed from time to time as if indicating that they were working fine.
