When East Trivedon fell, it was completely isolated to prevent any more stragglers besides the already escaped who were being hunted down before they reached civilization. West Trivedon was armed to the teeth in the borders in preparation while the US government was trying to find a way to end this for good. But then, the previously encountered Baratrum breached through here, and it all went downhill from here. We have reports that there is high activity around this area. Patient Zero must be here. Be prepared for anything. (Levels 11-15 map, Chapter 1 Finale)
Music: Icicle Ignition (Undertale: Last Corridor)
