"That would be preferable, yes," Castiel acknowledged. Uriel, in his usual gusto, had been much too happy to offer to smite the entire block and be done with it, but such would have left untold amount of casualties. As Heaven could not be reached for input, Anna gained the upper hand on behalf of the block's inhabitants and Uriel had withdrawn his suggestion, muttering about mud monkeys. They had laid siege and culled what they believed to be the majority of the demons from the vicinity, but the Enochian warding made the inside of the building an expansive blind spot. In truth, they could not be sure what, if anything, lay wait inside. The implication was that it was preferable that the chosen human not go up against demons, but the job did not come with guarantees.
"We believe that you are uniquely qualified for the task of covert entry. It will not be easy. But first, there are a few things we must prepare you for . . . in case." In case of what, he did not have to say.