Yu Yu Hakusho1992

Koenma:
Okay, everyone, here's how it shakes down: There are four stages to such an apocalyptic breach. Stage One - Demon energy thickens in the human world, allowing demon parasites to thrive. As the size of the breech increases, we move to Stage Two, in which normal humans find themselves blessed with unusual powers. Now Stage Three is where things really heat up. Demon energy floods the streets and low class monsters spawn at will. They aren't smart or strong, but they are excessively violent. In the fourth and final stage, the border tunnel breech achieves a stabilized diameter of over two kilometers, allowing total passage.