Remnant: The Last City
A glowing blue force field that surrounds Remnant and separates it from the rest of the world. It was created by the Council of Elders at the time of the Great Calamity to protect the city of Remnant from utter destruction.
The barrier has been maintained successfully by each subsequent Council of Elders all the way up to the present day. However, recently there have been rumors that the barrier is failing in places and things have been crossing over…