Except for the Ginia battle zone.

The abyssal rift in the Sea Ruins Battle Zone is the largest, with the scale of the war and the area covered by the flames of battle being equally immense. Even the combined size of the previous Sky Battle Zone and Deep Sea Forest Battle Zone couldn't compare to the Sea Ruins Battle Zone. Adding the later Black Reef Battle Zone only made the overall scale balanced.

But for Saga, his neutron flood could still cover the entire area.

Even Saga himself wasn't sure about the vast range that needed to be controlled and restrained, which was a major feature of this ability.