A Force Field, a Force Field A.

Ave has been researching a form of transportation that will be able to get the three of you through the field. She says, we discovered this anomaly several weeks ago, and we've been trying to figure out a way to breach it. The temporal chalice is what is projecting that field, and it is almost certainly where you will find it. We don't know what's waiting for you in there. It could be an army encampment or even a whole city.