In the inner region of the Alba Mountain Range, a giant black cube suddenly shook violently. The vibrations were transmitted to the surrounding ground causing several of the surrounding trees to collapse. The cube is the god prison that Lilith used to confine Ziel.
When the students and teachers were being hunted by Lilith, Ziel was filling the entire area of the God Prison with his power. He expended massive amounts of aura, mana, and spiritual power to overwhelm the God Prison. The entire area of the God Prison was almost the same size as a kingdom. Ziel must fully charge the entire area with his power until it is overloaded and explodes from within.