Adventurer Zero.

He didn't waste any more time as he stabbed the helpless gang boss, before retrieving his void daggers and regrouping with the others.

"What was that quake?" Brian asked when Blake arrived at the hideout entrance.

"Nothing much, I just blew up the core to save me the strength and energy to fight the gang boss." Blake said. Before he had made the decision, he had used the system to scan the walls of the hideout in order to prevent it from collapsing on them.

"Any problem at your end?" Blake asked as he looked over to Brian.

"Na…" Castiel said with a smile.

After being given the confirmation that they were done, Blake contacted Arnold. "It is done."

"Great, meet me at the adventurer association to receive your pay." Arnold said before cutting the communication link.

Once the call was over, the trio exited the sewers and boarded a carriage that took them to the adventurer's association.

…

On the other side of the call.