Mob was relieved that Reigen seemed to recover so quickly. It made it easier to concentrate on reaching out for any dangerous spirits in the area. Unfortunately for the both of them, the negative energy is too dense for him to root it out at its source. At least from here. It'd be like swimming through an enormous bowl full of jelly. If they got closer, it'd be easier.

"I'm not sure which way to go," Mob said, though his feet continued to carry him forward. "Do you have a map? I might have an easier time if we're closer to the building's middle."