It would have to be a new Arena which would be pitch black. The arena room would have no floor, but there would be round plat forms hanging from chains with glowing light in the center. There should supper charged thralls that spit green acid. And the main boss should be twice the size of the supper charged ones. The battle would be jumping from plat form to plat from taking down thrall while trying to avoid the boss and hitting him for a distance.