she is going to fly over the pacific ocean to seed rain so none would fall on land so she can build maruyu land. and end up causing a drought or smth kek

Supposedly this was suppose to be the Abyss equivalent of a weather controlling device. It was at least implied to be the reason it was snowing at the time.

"Warning. Weather Control Device detected."

The instant she gains reliable control the weather the war would be over wouldn’t it?

Wait, wait, Maru-Yu stop! That's a direction in which you should not be going!