Normal Form
The stage is divided in several floors. There are also bombs scattered on each floor which can be detonated to clear the support blocks/pillars to make them collapse. Don't worry since the explosions and floors collapsing above won't damage any players. There are also usable ladders in each floor.. The building has unlimited floors and destroying the current floors will just be replaced with another one above, albeit with a different layout ala tetris.
The drums are not just there as obstacles; if ever the you're directly under one when a floor collapses, you'll be trapped inside for a brief period.
Omega Form
The battle takes place on the rooftop of the building with no hazards or transitions.