The Boundary’s a strange dimension

The brightly lit corridor stretched long and straight, leading to the cathedral ahead. With the cool sound of his boots echoing in a silence similar to the deep sea, Jin walked without hesitation.

He was heading for the underground research facility.

He wanted to check on the status of something that was there. That something was the "Cauldron," which connected the world to the "Boundary," a strange dimension outside of it.
- Blazblue: Continuum Shift Part 2 Chapter 3