Dark Guild couldn't comprehend what was happening to them at all as their hideout was simultaneously attacked.
Many of them tried to escape, only to be tracked down and killed. They couldn't escape and only hid, which was the reason that they were safe as long as they couldn't be found out. However, with their hideout exposed, they had nothing that could save them from The Authority and Explorers from different guilds.
Even their Headquarter was being raided by an army of Rank-A and Rank-S. As they had gotten the information that the place was a headquarters, they were more than prepared.
However, there was nothing for them to worry about. Most of their strong fighters were gone and only a couple of people were left behind.
It was easier to destroy their headquarters than other hideouts where Rank-S executives were present. However, they didn't find the head of the Dark Guild. He seemed to have already abandoned the place and ran away.