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Okay. Now I'll wait for the guys and ask them for advice. If that's the case, I would destroy the other spheres as well; maybe they really are a win condition against this boss. But I'm not sure. For example, it's possible that the spheres need to be destroyed after the boss appears, not before, and right now we're just making things more difficult for ourselves. Or maybe it's not like that at all, and the spheres protect against flooding. In any case, we need to think about it.