Blank-Faced Joe ordered his subordinate to hand him the remaining keys he lacked, and after looking at them for a long moment. His hand moved as he began assembling them in a mysterious way; this unknown fact was the last defensive wall to protect the treasury. The seven keys were in fact a hidden puzzle that needed a special assembling before they could open the door that led to the treasury.
After a minute of concentration, he managed to assemble the seven keys into a star-shaped object, and his subordinate looked at him with awe as they didn't even know that the key needed to be used like this. A few of them couldn't help but feel shame. They had thought of treason when they dealt with the keys. But now they didn't feel any regret when they saw that they simply weren't qualified enough. His fluid action clearly showed them that he had dabbled with the seven keys more than once, as if he was one of their creators.