I've been doing Fern's victory road puzzle according to a youtube guide, but now I'm stuck. So I turned trees into crystals three times and got Fern's Decuideye to break them with arrows, and from what I see from the video it should stop shooting arrows after the third time, which lets me move up the main path. But after breaking all three crystals the arrows haven't stopped, and I can't get through. I can't figure what I missed doing.